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Posted to commits@polygene.apache.org by ni...@apache.org on 2016/12/17 10:27:44 UTC
[08/81] [abbrv] [partial] zest-java git commit: ZEST-195 ;
Replace all "zest" with "polygene"
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/property/PropertyModel.java
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diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/property/PropertyModel.java b/core/runtime/src/main/java/org/apache/polygene/runtime/property/PropertyModel.java
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--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/property/PropertyModel.java
@@ -0,0 +1,338 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.property;
+
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.Field;
+import java.lang.reflect.Member;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.lang.reflect.TypeVariable;
+import java.util.List;
+import java.util.stream.Stream;
+import org.apache.polygene.api.common.MetaInfo;
+import org.apache.polygene.api.common.QualifiedName;
+import org.apache.polygene.api.constraint.ConstraintViolation;
+import org.apache.polygene.api.constraint.ConstraintViolationException;
+import org.apache.polygene.api.entity.Queryable;
+import org.apache.polygene.api.property.DefaultValues;
+import org.apache.polygene.api.property.GenericPropertyInfo;
+import org.apache.polygene.api.property.InvalidPropertyTypeException;
+import org.apache.polygene.api.property.Property;
+import org.apache.polygene.api.property.PropertyDescriptor;
+import org.apache.polygene.api.service.NoSuchServiceException;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.type.Serialization;
+import org.apache.polygene.api.type.ValueCompositeType;
+import org.apache.polygene.api.type.ValueType;
+import org.apache.polygene.api.util.Classes;
+import org.apache.polygene.api.value.MissingValueSerializationException;
+import org.apache.polygene.api.value.ValueDeserializer;
+import org.apache.polygene.api.util.Visitable;
+import org.apache.polygene.api.util.Visitor;
+import org.apache.polygene.bootstrap.BindingException;
+import org.apache.polygene.runtime.composite.ValueConstraintsInstance;
+import org.apache.polygene.runtime.model.Binder;
+import org.apache.polygene.runtime.model.Resolution;
+import org.apache.polygene.runtime.types.ValueTypeFactory;
+
+/**
+ * Model for a Property.
+ *
+ * <p>Equality is based on the Property accessor object (property type and name), not on the QualifiedName.</p>
+ */
+public class PropertyModel
+ implements PropertyDescriptor, PropertyInfo, Binder, Visitable<PropertyModel>
+{
+ private Type type;
+
+ private transient AccessibleObject accessor; // Interface accessor
+
+ private final QualifiedName qualifiedName;
+
+ private final ValueConstraintsInstance constraints; // May be null
+
+ protected final MetaInfo metaInfo;
+
+ private final Object initialValue;
+
+ private final boolean useDefaults;
+
+ private final boolean immutable;
+
+ private ValueType valueType;
+
+ protected PropertyInfo builderInfo;
+
+ private final boolean queryable;
+
+ public PropertyModel( AccessibleObject accessor,
+ boolean immutable,
+ boolean useDefaults,
+ ValueConstraintsInstance constraints,
+ MetaInfo metaInfo,
+ Object initialValue
+ )
+ {
+ if( accessor instanceof Method )
+ {
+ Method m = (Method) accessor;
+ if( !m.getReturnType().equals( Property.class ) )
+ {
+ throw new InvalidPropertyTypeException( accessor );
+ }
+ }
+ this.immutable = immutable;
+ this.metaInfo = metaInfo;
+ type = GenericPropertyInfo.propertyTypeOf( accessor );
+ this.accessor = accessor;
+ qualifiedName = QualifiedName.fromAccessor( accessor );
+
+ this.useDefaults = useDefaults;
+
+ this.initialValue = initialValue;
+
+ this.constraints = constraints;
+
+ final Queryable queryable = accessor.getAnnotation( Queryable.class );
+ this.queryable = queryable == null || queryable.value();
+ }
+
+ @Override
+ public <T> T metaInfo( Class<T> infoType )
+ {
+ return metaInfo.get( infoType );
+ }
+
+ public String name()
+ {
+ return qualifiedName.name();
+ }
+
+ @Override
+ public QualifiedName qualifiedName()
+ {
+ return qualifiedName;
+ }
+
+ @Override
+ public Type type()
+ {
+ return type;
+ }
+
+ @Override
+ public AccessibleObject accessor()
+ {
+ return accessor;
+ }
+
+ @Override
+ public ValueType valueType()
+ {
+ return valueType;
+ }
+
+ @Override
+ public boolean isImmutable()
+ {
+ return immutable;
+ }
+
+ public PropertyInfo getBuilderInfo()
+ {
+ return builderInfo;
+ }
+
+ @Override
+ public boolean queryable()
+ {
+ return queryable;
+ }
+
+ @Override
+ public Object initialValue( ModuleDescriptor module )
+ {
+ // Use supplied value from assembly
+ Object value = initialValue;
+
+ // Check for @UseDefaults annotation
+ if( useDefaults )
+ {
+ if( value == null || ( ( value instanceof String ) && ( (String) value ).length() == 0 ) )
+ {
+ if( valueType instanceof ValueCompositeType )
+ {
+ Class<?> propertyType = valueType().types().findFirst().orElse( null );
+ value = module.instance().newValue( propertyType );
+ }
+ else
+ {
+ value = DefaultValues.getDefaultValueOf( type );
+ }
+ }
+ else
+ {
+ Class<?> propertyType = valueType().types().findFirst().orElse( null );
+ if( value instanceof String && !propertyType.equals( String.class ) )
+ {
+ try
+ {
+ // here we could possibly deserialize json to other types...
+ ValueDeserializer deserializer = module.instance()
+ .serviceFinder()
+ .findService( ValueDeserializer.class )
+ .get();
+ if( deserializer != null )
+ {
+ value = deserializer.deserialize( module, propertyType ).apply( (String) value );
+ }
+ }
+ catch( NoSuchServiceException e )
+ {
+ throw new MissingValueSerializationException( "@UseDefaults with initialization value requires that there is a visible ValueDeserializer service available.", e);
+ }
+ }
+ }
+ }
+ return value;
+ }
+
+ @Override
+ public void bind( Resolution resolution )
+ throws BindingException
+ {
+ ValueTypeFactory factory = ValueTypeFactory.instance();
+ Class<?> declaringClass = ( (Member) accessor() ).getDeclaringClass();
+ Class<?> mainType = resolution.model().types().findFirst().orElse( null );
+ Serialization.Variant variant = findVariant();
+ valueType = factory.newValueType( type(), declaringClass, mainType, resolution.layer(), resolution.module(), variant );
+ builderInfo = new BuilderPropertyInfo();
+ if( type instanceof TypeVariable )
+ {
+ type = Classes.resolveTypeVariable( (TypeVariable) type, declaringClass, mainType );
+ }
+ }
+
+ private Serialization.Variant findVariant()
+ {
+ Serialization serialization = metaInfo.get( Serialization.class );
+ Serialization.Variant variant = null;
+ if( serialization != null )
+ {
+ variant = serialization.value();
+ }
+ if( variant == null )
+ {
+ variant = Serialization.Variant.entry;
+ }
+ return variant;
+ }
+
+ @Override
+ public <ThrowableType extends Throwable> boolean accept( Visitor<? super PropertyModel, ThrowableType> visitor )
+ throws ThrowableType
+ {
+ return visitor.visit( this );
+ }
+
+ @Override
+ public void checkConstraints( Object value )
+ throws ConstraintViolationException
+ {
+ if( constraints == null )
+ {
+ return;
+ }
+ constraints.checkConstraints( value, accessor );
+ }
+
+ @Override
+ public boolean equals( Object o )
+ {
+ if( this == o )
+ {
+ return true;
+ }
+ if( o == null || getClass() != o.getClass() )
+ {
+ return false;
+ }
+
+ PropertyModel that = (PropertyModel) o;
+ return accessor.equals( that.accessor );
+ }
+
+ @Override
+ public int hashCode()
+ {
+ return accessor.hashCode();
+ }
+
+ @Override
+ public String toString()
+ {
+ if( accessor instanceof Field )
+ {
+ return ( (Field) accessor ).toGenericString();
+ }
+ else
+ {
+ return ( (Method) accessor ).toGenericString();
+ }
+ }
+
+ private class BuilderPropertyInfo implements PropertyInfo
+ {
+ @Override
+ public boolean isImmutable()
+ {
+ return false;
+ }
+
+ @Override
+ public QualifiedName qualifiedName()
+ {
+ return qualifiedName;
+ }
+
+ @Override
+ public Type type()
+ {
+ return type;
+ }
+
+ @Override
+ public void checkConstraints( Object value )
+ throws ConstraintViolationException
+ {
+ if( constraints != null )
+ {
+ List<ConstraintViolation> violations = constraints.checkConstraints( value );
+ if( !violations.isEmpty() )
+ {
+ Stream<Class<?>> empty = Stream.empty();
+ throw new ConstraintViolationException( "", empty, (Member) accessor, violations );
+ }
+ }
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/query/IterableQuerySource.java
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diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/query/IterableQuerySource.java b/core/runtime/src/main/java/org/apache/polygene/runtime/query/IterableQuerySource.java
new file mode 100644
index 0000000..b12ba18
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/query/IterableQuerySource.java
@@ -0,0 +1,245 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.query;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Predicate;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+import org.apache.polygene.api.composite.Composite;
+import org.apache.polygene.api.property.Property;
+import org.apache.polygene.api.query.grammar.OrderBy;
+import org.apache.polygene.spi.query.QuerySource;
+
+import static java.util.stream.Collectors.toList;
+import static org.apache.polygene.api.util.Classes.instanceOf;
+
+/**
+ * JAVADOC
+ */
+public class IterableQuerySource
+ implements QuerySource
+{
+ private final Iterable iterable;
+
+ /**
+ * Constructor.
+ *
+ * @param iterable iterable
+ */
+ @SuppressWarnings( "raw" )
+ IterableQuerySource( final Iterable iterable )
+ {
+ this.iterable = iterable;
+ }
+
+ @Override
+ public <T> T find( Class<T> resultType,
+ Predicate<Composite> whereClause,
+ List<OrderBy> orderBySegments,
+ Integer firstResult,
+ Integer maxResults,
+ Map<String, Object> variables
+ )
+ {
+ return stream( resultType, whereClause, orderBySegments, firstResult, maxResults, variables )
+ .findFirst().orElse( null );
+ }
+
+ @Override
+ public <T> long count( Class<T> resultType,
+ Predicate<Composite> whereClause,
+ List<OrderBy> orderBySegments,
+ Integer firstResult,
+ Integer maxResults,
+ Map<String, Object> variables
+ )
+ {
+ return list( resultType, whereClause, orderBySegments, firstResult, maxResults, variables ).size();
+ }
+
+ @Override
+ public <T> Stream<T> stream( Class<T> resultType,
+ Predicate<Composite> whereClause,
+ List<OrderBy> orderBySegments,
+ Integer firstResult,
+ Integer maxResults,
+ Map<String, Object> variables
+ )
+ {
+ return list( resultType, whereClause, orderBySegments, firstResult, maxResults, variables ).stream();
+ }
+
+ @SuppressWarnings( {"raw", "unchecked"} )
+ private <T> List<T> list( Class<T> resultType,
+ Predicate<Composite> whereClause,
+ List<OrderBy> orderBySegments,
+ Integer firstResult,
+ Integer maxResults,
+ Map<String, Object> variables
+ )
+ {
+ // Ensure it's a list first
+ List<T> list = filter( resultType, whereClause );
+
+ // Order list
+ if( orderBySegments != null )
+ {
+ // Sort it
+ list.sort( new OrderByComparator( orderBySegments ) );
+ }
+
+ // Cut results
+ if( firstResult != null )
+ {
+ if( firstResult > list.size() )
+ {
+ return Collections.emptyList();
+ }
+
+ int toIdx;
+ if( maxResults != null )
+ {
+ toIdx = Math.min( firstResult + maxResults, list.size() );
+ }
+ else
+ {
+ toIdx = list.size();
+ }
+
+ list = list.subList( firstResult, toIdx );
+ }
+ else
+ {
+ int toIdx;
+ if( maxResults != null )
+ {
+ toIdx = Math.min( maxResults, list.size() );
+ }
+ else
+ {
+ toIdx = list.size();
+ }
+
+ list = list.subList( 0, toIdx );
+ }
+
+ return list;
+ }
+
+ @SuppressWarnings( {"raw", "unchecked"} )
+ private <T> List<T> filter( Class<T> resultType, Predicate whereClause )
+ {
+ Stream stream = StreamSupport.stream( iterable.spliterator(), false );
+ if( whereClause == null )
+ {
+ return List.class.cast( stream.filter( resultType::isInstance )
+ .collect( toList() ) );
+ }
+ else
+ {
+ return List.class.cast( stream.filter( instanceOf( resultType ).and( whereClause ) )
+ .collect( toList() ) );
+ }
+ }
+
+ @Override
+ public String toString()
+ {
+ return "IterableQuerySource{" + iterable + '}';
+ }
+
+ private static class OrderByComparator<T extends Composite>
+ implements Comparator<T>
+ {
+
+ private final Iterable<OrderBy> orderBySegments;
+
+ private OrderByComparator( Iterable<OrderBy> orderBySegments )
+ {
+ this.orderBySegments = orderBySegments;
+ }
+
+ @Override
+ @SuppressWarnings( {"raw", "unchecked"} )
+ public int compare( T o1, T o2 )
+ {
+ for( OrderBy orderBySegment : orderBySegments )
+ {
+ try
+ {
+ final Property prop1 = orderBySegment.property().apply( o1 );
+ final Property prop2 = orderBySegment.property().apply( o2 );
+ if( prop1 == null || prop2 == null )
+ {
+ if( prop1 == null && prop2 == null )
+ {
+ return 0;
+ }
+ else if( prop1 != null )
+ {
+ return 1;
+ }
+ return -1;
+ }
+ final Object value1 = prop1.get();
+ final Object value2 = prop2.get();
+ if( value1 == null || value2 == null )
+ {
+ if( value1 == null && value2 == null )
+ {
+ return 0;
+ }
+ else if( value1 != null )
+ {
+ return 1;
+ }
+ return -1;
+ }
+ if( value1 instanceof Comparable )
+ {
+ int result = ( (Comparable) value1 ).compareTo( value2 );
+ if( result != 0 )
+ {
+ if( orderBySegment.order() == OrderBy.Order.ASCENDING )
+ {
+ return result;
+ }
+ else
+ {
+ return -result;
+ }
+ }
+ }
+ }
+ catch( Exception e )
+ {
+ return 0;
+ }
+ }
+
+ return 0;
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderFactoryImpl.java
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diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderFactoryImpl.java b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderFactoryImpl.java
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+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderFactoryImpl.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.query;
+
+import org.apache.polygene.api.query.NotQueryableException;
+import org.apache.polygene.api.query.QueryBuilder;
+import org.apache.polygene.api.query.QueryBuilderFactory;
+import org.apache.polygene.api.service.NoSuchServiceException;
+import org.apache.polygene.api.service.ServiceFinder;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.api.util.NullArgumentException;
+import org.apache.polygene.spi.query.EntityFinder;
+
+/**
+ * Default implementation of {@link QueryBuilderFactory}
+ */
+public final class QueryBuilderFactoryImpl
+ implements QueryBuilderFactory
+{
+ private ServiceFinder finder;
+
+ /**
+ * Constructor.
+ *
+ * @param finder The ServiceFinder of the Module this QueryBuilderFactory belongs to.
+ */
+ public QueryBuilderFactoryImpl( ServiceFinder finder )
+ {
+ NullArgumentException.validateNotNull( "ServiceFinder", finder );
+ this.finder = finder;
+ }
+
+ /**
+ * @see QueryBuilderFactory#newQueryBuilder(Class)
+ */
+ @Override
+ public <T> QueryBuilder<T> newQueryBuilder( final Class<T> resultType )
+ {
+ NotQueryableException.throwIfNotQueryable( resultType );
+
+ final ServiceReference<EntityFinder> serviceReference;
+ try
+ {
+ serviceReference = finder.findService( EntityFinder.class );
+ return new QueryBuilderImpl<T>( serviceReference.get(), resultType, null );
+ }
+ catch( NoSuchServiceException e )
+ {
+ return new QueryBuilderImpl<T>( null, resultType, null );
+ }
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderImpl.java
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diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderImpl.java b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderImpl.java
new file mode 100644
index 0000000..7d5cb4b
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryBuilderImpl.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.query;
+
+import java.util.function.Predicate;
+import org.apache.polygene.api.composite.Composite;
+import org.apache.polygene.api.query.Query;
+import org.apache.polygene.api.query.QueryBuilder;
+import org.apache.polygene.api.query.QueryExpressions;
+import org.apache.polygene.spi.query.EntityFinder;
+import org.apache.polygene.spi.query.QueryBuilderSPI;
+import org.apache.polygene.spi.query.QuerySource;
+
+/**
+ * Default implementation of {@link QueryBuilder}
+ */
+final class QueryBuilderImpl<T>
+ implements QueryBuilder<T>, QueryBuilderSPI<T>
+{
+
+ /**
+ * Entity finder to be used to locate entities.
+ */
+ private final EntityFinder entityFinder;
+
+ /**
+ * Type of queried entities.
+ */
+ private final Class<T> resultType;
+ /**
+ * Where clause.
+ */
+ private final Predicate<Composite> whereClause;
+
+ /**
+ * Constructor.
+ *
+ * @param entityFinder entity finder to be used to locate entities; canot be null
+ * @param resultType type of queried entities; cannot be null
+ * @param whereClause current where-clause
+ */
+ QueryBuilderImpl( final EntityFinder entityFinder,
+ final Class<T> resultType,
+ final Predicate<Composite> whereClause
+ )
+ {
+ this.entityFinder = entityFinder;
+ this.resultType = resultType;
+ this.whereClause = whereClause;
+ }
+
+ @Override
+ @SuppressWarnings( "unchecked" )
+ public QueryBuilder<T> where( Predicate<Composite> specification )
+ {
+ if( specification == null )
+ {
+ throw new IllegalArgumentException( "Where clause cannot be null" );
+ }
+ if( this.whereClause != null )
+ {
+ specification = QueryExpressions.and( this.whereClause, specification );
+ }
+ return new QueryBuilderImpl<>( entityFinder, resultType, specification );
+ }
+
+ @Override
+ public Query<T> newQuery( Iterable<T> iterable )
+ {
+ return new QueryImpl<>( resultType, whereClause, new IterableQuerySource( iterable ) );
+ }
+
+ // SPI
+ @Override
+ public Query<T> newQuery( QuerySource querySource )
+ {
+ return new QueryImpl<>( resultType, whereClause, querySource );
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryImpl.java
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diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryImpl.java b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryImpl.java
new file mode 100644
index 0000000..d4d768c
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+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/query/QueryImpl.java
@@ -0,0 +1,220 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.query;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Predicate;
+import java.util.stream.Stream;
+import org.apache.polygene.api.composite.Composite;
+import org.apache.polygene.api.property.Property;
+import org.apache.polygene.api.query.Query;
+import org.apache.polygene.api.query.QueryExecutionException;
+import org.apache.polygene.api.query.QueryExpressions;
+import org.apache.polygene.api.query.grammar.OrderBy;
+import org.apache.polygene.spi.query.QuerySource;
+
+/**
+ * Default implementation of {@link org.apache.polygene.api.query.Query}.
+ */
+/* package */ class QueryImpl<T>
+ implements Query<T>
+{
+ private static final long serialVersionUID = 1L;
+
+ /**
+ * Type of queried entities.
+ */
+ private final Class<T> resultType;
+ /**
+ * Where clause.
+ */
+ private final Predicate<Composite> whereClause;
+ private QuerySource querySource;
+ /**
+ * Order by clause segments.
+ */
+ private List<OrderBy> orderBySegments;
+ /**
+ * First result to be returned.
+ */
+ private Integer firstResult;
+ /**
+ * Maximum number of results to be returned.
+ */
+ private Integer maxResults;
+ /**
+ * Mapping between variable name and variable values.
+ */
+ private Map<String, Object> variables;
+
+ /**
+ * Constructor.
+ *
+ * @param resultType type of queried entities; cannot be null
+ * @param whereClause where clause
+ */
+ /* package */ QueryImpl( final Class<T> resultType,
+ final Predicate<Composite> whereClause,
+ final QuerySource querySource
+ )
+ {
+ this.resultType = resultType;
+ this.whereClause = whereClause;
+ this.querySource = querySource;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#orderBy(org.apache.polygene.api.query.grammar.OrderBy[])
+ */
+ @Override
+ public Query<T> orderBy( final OrderBy... segments )
+ {
+ orderBySegments = Arrays.asList( segments );
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#orderBy(org.apache.polygene.api.property.Property, org.apache.polygene.api.query.grammar.OrderBy.Order)
+ */
+ @Override
+ public Query<T> orderBy( Property<?> property, OrderBy.Order order )
+ {
+ if( orderBySegments == null )
+ {
+ orderBySegments = new ArrayList<>();
+ }
+ orderBySegments.add( new OrderBy( QueryExpressions.property( property ), order ) );
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#orderBy(org.apache.polygene.api.property.Property)
+ */
+ @Override
+ public Query<T> orderBy( Property<?> property )
+ {
+ orderBy( property, OrderBy.Order.ASCENDING );
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#firstResult(int)
+ */
+ @Override
+ public Query<T> firstResult( int firstResult )
+ {
+ this.firstResult = firstResult;
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#maxResults(int)
+ */
+ @Override
+ public Query<T> maxResults( int maxResults )
+ {
+ this.maxResults = maxResults;
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#setVariable(String, Object)
+ */
+ @SuppressWarnings( "unchecked" )
+ @Override
+ public Query<T> setVariable( final String name, final Object value )
+ {
+ if( variables == null )
+ {
+ variables = new HashMap<String, Object>();
+ }
+ variables.put( name, value );
+
+ return this;
+ }
+
+ /**
+ * @see org.apache.polygene.api.query.Query#getVariable(String)
+ */
+ @SuppressWarnings( "unchecked" )
+ @Override
+ public <V> V getVariable( final String name )
+ {
+ if( variables == null )
+ {
+ return null;
+ }
+ else
+ {
+ return (V) variables.get( name );
+ }
+ }
+
+ @Override
+ public Class<T> resultType()
+ {
+ return resultType;
+ }
+
+ @Override
+ public T find()
+ throws QueryExecutionException
+ {
+ return querySource.find( resultType, whereClause, orderBySegments, firstResult, maxResults, variables );
+ }
+
+ @Override
+ public long count()
+ throws QueryExecutionException
+ {
+ return querySource.count( resultType, whereClause, orderBySegments, firstResult, maxResults, variables );
+ }
+
+ @Override
+ public Iterator<T> iterator()
+ {
+ return stream().iterator();
+ }
+
+ @Override
+ public Stream<T> stream()
+ {
+ return querySource.stream( resultType, whereClause, orderBySegments, firstResult, maxResults, variables );
+ }
+
+ @Override
+ public String toString()
+ {
+ return "Query{" +
+ " FROM " + querySource +
+ " WHERE " + whereClause +
+ ( orderBySegments != null ? " ORDER BY " + orderBySegments : "" ) +
+ ( firstResult != null ? " FIRST " + firstResult : "" ) +
+ ( maxResults != null ? " MAX " + maxResults : "" ) +
+ " EXPECT " + resultType +
+ ( variables != null ? " WITH VARIABLES " + variables : "" ) +
+ '}';
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceInstance.java
new file mode 100644
index 0000000..104938f
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceInstance.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.service;
+
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.service.ServiceImporter;
+
+/**
+ * JAVADOC
+ */
+public final class ImportedServiceInstance<T>
+ implements Activation
+{
+ private final T instance;
+ private final ServiceImporter<T> importer;
+
+ public ImportedServiceInstance( T instance, ServiceImporter<T> importer )
+ {
+ this.importer = importer;
+ this.instance = instance;
+ }
+
+ public T instance()
+ {
+ return instance;
+ }
+
+ public ServiceImporter importer()
+ {
+ return importer;
+ }
+
+ public boolean isAvailable()
+ {
+ return importer.isAvailable( instance );
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ // NOOP
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ // NOOP
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceModel.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceModel.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceModel.java
new file mode 100644
index 0000000..174735f
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceModel.java
@@ -0,0 +1,197 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Proxy;
+import java.util.stream.Stream;
+import org.apache.polygene.api.common.MetaInfo;
+import org.apache.polygene.api.common.Visibility;
+import org.apache.polygene.api.identity.Identity;
+import org.apache.polygene.api.service.ImportedServiceDescriptor;
+import org.apache.polygene.api.service.ServiceImporter;
+import org.apache.polygene.api.service.ServiceImporterException;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.util.HierarchicalVisitor;
+import org.apache.polygene.api.util.VisitableHierarchy;
+import org.apache.polygene.runtime.activation.ActivatorsInstance;
+import org.apache.polygene.runtime.activation.ActivatorsModel;
+
+/**
+ * JAVADOC
+ */
+public final class ImportedServiceModel
+ implements ImportedServiceDescriptor, VisitableHierarchy<Object, Object>
+{
+ private final ModuleDescriptor module;
+ private final Class<?> type;
+ private final Visibility visibility;
+ @SuppressWarnings( "raw" )
+ private final Class<? extends ServiceImporter> serviceImporter;
+ private final Identity identity;
+ private final boolean importOnStartup;
+ private final MetaInfo metaInfo;
+ private final ActivatorsModel<?> activatorsModel;
+ private final String moduleName;
+
+ @SuppressWarnings( "raw" )
+ public ImportedServiceModel( ModuleDescriptor module,
+ Class serviceType,
+ Visibility visibility,
+ Class<? extends ServiceImporter> serviceImporter,
+ Identity identity,
+ boolean importOnStartup,
+ MetaInfo metaInfo,
+ ActivatorsModel<?> activatorsModel,
+ String moduleName
+ )
+ {
+ this.module = module;
+ type = serviceType;
+ this.visibility = visibility;
+ this.serviceImporter = serviceImporter;
+ this.identity = identity;
+ this.importOnStartup = importOnStartup;
+ this.metaInfo = metaInfo;
+ this.activatorsModel = activatorsModel;
+ this.moduleName = moduleName;
+ }
+
+ public boolean isImportOnStartup()
+ {
+ return importOnStartup;
+ }
+
+ @Override
+ @SuppressWarnings( "unchecked" )
+ public Stream<Class<?>> types()
+ {
+ return Stream.of( type );
+ }
+
+ @Override
+ public Visibility visibility()
+ {
+ return visibility;
+ }
+
+ @Override
+ public ModuleDescriptor module()
+ {
+ return module;
+ }
+
+ @Override
+ public <T> T metaInfo( Class<T> infoType )
+ {
+ return metaInfo.get( infoType );
+ }
+
+ @Override
+ @SuppressWarnings( "raw" )
+ public Class<? extends ServiceImporter> serviceImporter()
+ {
+ return serviceImporter;
+ }
+
+ @Override
+ public Class<?> type()
+ {
+ return type;
+ }
+
+ @Override
+ public Identity identity()
+ {
+ return identity;
+ }
+
+ public String moduleName()
+ {
+ return moduleName;
+ }
+
+ @SuppressWarnings( { "raw", "unchecked" } )
+ public ActivatorsInstance<?> newActivatorsInstance( ModuleDescriptor module )
+ throws Exception
+ {
+ return new ActivatorsInstance( activatorsModel.newInstances( module ) );
+ }
+
+ @Override
+ public boolean isAssignableTo( Class<?> type )
+ {
+ return this.type.isAssignableFrom( type );
+ }
+
+ @Override
+ public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
+ throws ThrowableType
+ {
+ if( visitor.visitEnter( this ) )
+ {
+ activatorsModel.accept( visitor );
+ }
+ return visitor.visitLeave( this );
+ }
+
+ @SuppressWarnings( { "raw", "unchecked" } )
+ public <T> ImportedServiceInstance<T> importInstance( ModuleDescriptor module )
+ {
+ try
+ {
+ ServiceImporter importer = module.instance().newObject( serviceImporter );
+ T instance = (T) importer.importService( this );
+ return new ImportedServiceInstance<>( instance, importer );
+ }
+ catch( ServiceImporterException e )
+ {
+ throw e;
+ }
+ catch( Exception e )
+ {
+ throw new ServiceImporterException( "Could not import service " + identity, e );
+ }
+ }
+
+ @SuppressWarnings( "raw" )
+ public Object newProxy( InvocationHandler serviceInvocationHandler )
+ {
+ if( type.isInterface() )
+ {
+ return Proxy.newProxyInstance( type.getClassLoader(),
+ new Class[]{ type },
+ serviceInvocationHandler );
+ }
+ else
+ {
+ Class[] interfaces = type.getInterfaces();
+ return Proxy.newProxyInstance( type.getClassLoader(),
+ interfaces,
+ serviceInvocationHandler );
+ }
+ }
+
+ @Override
+ public String toString()
+ {
+ return type.getName() + ":" + identity;
+ }
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceReferenceInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceReferenceInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceReferenceInstance.java
new file mode 100644
index 0000000..328e26b
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServiceReferenceInstance.java
@@ -0,0 +1,221 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.util.stream.Stream;
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationEventListener;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.composite.ModelDescriptor;
+import org.apache.polygene.api.identity.Identity;
+import org.apache.polygene.api.service.ServiceImporterException;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.api.service.ServiceUnavailableException;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.runtime.activation.ActivationDelegate;
+
+/**
+ * Implementation of ServiceReference. This manages the reference to the imported service.
+ * <p>
+ * Whenever the service is requested it is returned directly to the client. That means that
+ * to handle service passivation and unavailability correctly, any proxying must be done in the
+ * service importer.
+ * </p>
+ *
+ * @param <T> Service Type
+ */
+public final class ImportedServiceReferenceInstance<T>
+ implements ServiceReference<T>, Activation
+{
+ private volatile ImportedServiceInstance<T> serviceInstance;
+ private T instance;
+ private final ModuleDescriptor module;
+ private final ImportedServiceModel serviceModel;
+ private final ActivationDelegate activation = new ActivationDelegate( this );
+ private boolean active = false;
+
+ public ImportedServiceReferenceInstance( ImportedServiceModel serviceModel, ModuleDescriptor module )
+ {
+ this.module = module;
+ this.serviceModel = serviceModel;
+ }
+
+ @Override
+ public Identity identity()
+ {
+ return serviceModel.identity();
+ }
+
+ @Override
+ public Stream<Class<?>> types()
+ {
+ return serviceModel.types();
+ }
+
+ @Override
+ public <M> M metaInfo( Class<M> infoType )
+ {
+ return serviceModel.metaInfo( infoType );
+ }
+
+ @Override
+ public synchronized T get()
+ {
+ return getInstance();
+ }
+
+ public ImportedServiceModel serviceDescriptor()
+ {
+ return serviceModel;
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ if( serviceModel.isImportOnStartup() )
+ {
+ getInstance();
+ }
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ if( serviceInstance != null )
+ {
+ try
+ {
+ activation.passivate( () -> active = false );
+ }
+ finally
+ {
+ serviceInstance = null;
+ active = false;
+ }
+ }
+ }
+
+ @Override
+ public boolean isActive()
+ {
+ return active;
+ }
+
+ @Override
+ public boolean isAvailable()
+ {
+ try
+ {
+ getInstance();
+ return serviceInstance.isAvailable();
+ }
+ catch( ServiceImporterException ex )
+ {
+ return false;
+ }
+ }
+
+ @Override
+ public ModelDescriptor model()
+ {
+ return serviceModel;
+ }
+
+ public ModuleDescriptor module()
+ {
+ return module;
+ }
+
+ private T getInstance()
+ throws ServiceImporterException
+ {
+ // DCL that works with Java 1.5 volatile semantics
+ if( serviceInstance == null )
+ {
+ synchronized( this )
+ {
+ if( serviceInstance == null )
+ {
+ serviceInstance = serviceModel.<T>importInstance( module );
+ instance = serviceInstance.instance();
+
+ try
+ {
+ activation.activate(
+ serviceModel.newActivatorsInstance( module ),
+ serviceInstance, () -> {
+ active = true;
+ }
+ );
+ }
+ catch( Exception e )
+ {
+ serviceInstance = null;
+ throw new ServiceUnavailableException( "Could not activate service " + serviceModel.identity(), e );
+ }
+ }
+ }
+ }
+
+ return instance;
+ }
+
+ @Override
+ public String toString()
+ {
+ return serviceModel.identity() + ", active=" + isActive() + ", module='" + serviceModel.moduleName() + "'";
+ }
+
+ @Override
+ public void registerActivationEventListener( ActivationEventListener listener )
+ {
+ activation.registerActivationEventListener( listener );
+ }
+
+ @Override
+ public void deregisterActivationEventListener( ActivationEventListener listener )
+ {
+ activation.deregisterActivationEventListener( listener );
+ }
+
+ @Override
+ public int hashCode()
+ {
+ return identity().hashCode();
+ }
+
+ @Override
+ public boolean equals( Object obj )
+ {
+ if( obj == null )
+ {
+ return false;
+ }
+ if( getClass() != obj.getClass() )
+ {
+ return false;
+ }
+ final ServiceReference other = (ServiceReference) obj;
+ return identity().equals( other.identity() );
+ }
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesInstance.java
new file mode 100644
index 0000000..61a15c9
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesInstance.java
@@ -0,0 +1,128 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.util.List;
+import java.util.stream.Stream;
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationEventListener;
+import org.apache.polygene.api.activation.ActivationEventListenerRegistration;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.common.Visibility;
+import org.apache.polygene.api.service.ImportedServiceDescriptor;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.runtime.activation.ActivationDelegate;
+import org.apache.polygene.runtime.activation.ActivatorsInstance;
+
+import static java.util.stream.Collectors.toList;
+
+/**
+ * JAVADOC
+ */
+public class ImportedServicesInstance
+ implements Activation, ActivationEventListenerRegistration
+{
+ private final ImportedServicesModel servicesModel;
+ private final List<ServiceReference<?>> serviceReferences;
+ private final ActivationDelegate activation = new ActivationDelegate( this, false );
+
+ public ImportedServicesInstance( ImportedServicesModel servicesModel,
+ List<ServiceReference<?>> serviceReferences
+ )
+ {
+ this.servicesModel = servicesModel;
+ this.serviceReferences = serviceReferences;
+ for( ServiceReference serviceReference : serviceReferences )
+ {
+ serviceReference.registerActivationEventListener( activation );
+ }
+ }
+
+ public Stream<ImportedServiceModel> models()
+ {
+ return servicesModel.models();
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ Iterable<Activation> activatees = serviceReferences.stream().filter( Activation.class::isInstance )
+ .map( Activation.class::cast )
+ .collect( toList() );
+ activation.activate( ActivatorsInstance.EMPTY, activatees );
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ activation.passivate();
+ }
+
+ public Stream<ServiceReference<?>> visibleServices( final Visibility visibility )
+ {
+ return serviceReferences.stream()
+ .filter( item ->
+ ( (ImportedServiceReferenceInstance) item ).serviceDescriptor()
+ .visibility()
+ .ordinal() >= visibility.ordinal()
+ );
+ }
+
+ @Override
+ public String toString()
+ {
+ StringBuilder sb = new StringBuilder( "Services{" );
+ String sep = " ";
+ for( ServiceReference serviceReference : serviceReferences )
+ {
+ sb.append( sep ).
+ append( serviceReference.identity() ).
+ append( "(active=" ).append( serviceReference.isActive() ).append( ")" );
+ sep = ", ";
+ }
+ return sb.append( " }" ).toString();
+ }
+
+ @Override
+ public void registerActivationEventListener( ActivationEventListener listener )
+ {
+ activation.registerActivationEventListener( listener );
+ }
+
+ @Override
+ public void deregisterActivationEventListener( ActivationEventListener listener )
+ {
+ activation.deregisterActivationEventListener( listener );
+ }
+
+ public Stream<? extends ImportedServiceDescriptor> stream()
+ {
+ return servicesModel.models();
+ }
+
+ public Stream<ServiceReference<?>> references()
+ {
+ return serviceReferences.stream();
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesModel.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesModel.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesModel.java
new file mode 100644
index 0000000..af34755
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ImportedServicesModel.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.service;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.util.HierarchicalVisitor;
+import org.apache.polygene.api.util.VisitableHierarchy;
+
+/**
+ * JAVADOC
+ */
+public class ImportedServicesModel
+ implements VisitableHierarchy<Object, Object>
+{
+ private List<ImportedServiceModel> importedServiceModels;
+
+ public ImportedServicesModel( List<ImportedServiceModel> importedServiceModels )
+ {
+ this.importedServiceModels = importedServiceModels;
+ }
+
+ public ImportedServicesInstance newInstance( ModuleDescriptor module )
+ {
+ List<ServiceReference<?>> serviceReferences = new ArrayList<>();
+ for( ImportedServiceModel serviceModel : importedServiceModels )
+ {
+ ImportedServiceReferenceInstance serviceReferenceInstance = new ImportedServiceReferenceInstance( serviceModel, module );
+ serviceReferences.add( serviceReferenceInstance );
+ }
+
+ return new ImportedServicesInstance( this, serviceReferences );
+ }
+
+ @Override
+ public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
+ throws ThrowableType
+ {
+ if( visitor.visitEnter( this ) )
+ {
+ for( ImportedServiceModel importedServiceModel : importedServiceModels )
+ {
+ if( !importedServiceModel.accept( visitor ) )
+ {
+ break;
+ }
+ }
+ }
+ return visitor.visitLeave( this );
+ }
+
+ public Stream<ImportedServiceModel> models()
+ {
+ return importedServiceModels.stream();
+ }
+}
\ No newline at end of file
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceInstance.java
new file mode 100644
index 0000000..da40e1f
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceInstance.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.service;
+
+import java.lang.reflect.Proxy;
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.configuration.Configuration;
+import org.apache.polygene.api.configuration.Enabled;
+import org.apache.polygene.api.service.Availability;
+import org.apache.polygene.api.service.ServiceComposite;
+import org.apache.polygene.api.util.Classes;
+import org.apache.polygene.runtime.composite.TransientInstance;
+import org.apache.polygene.runtime.composite.TransientStateInstance;
+
+/**
+ * JAVADOC
+ */
+public class ServiceInstance
+ extends TransientInstance
+ implements Activation
+{
+ public static TransientInstance serviceInstanceOf( ServiceComposite composite )
+ {
+ return (TransientInstance) Proxy.getInvocationHandler( composite );
+ }
+
+ private final boolean implementsServiceAvailable;
+ private final boolean hasEnabledConfiguration;
+
+ public ServiceInstance( ServiceModel compositeModel,
+ Object[] mixins,
+ TransientStateInstance state
+ )
+ {
+ super( compositeModel, mixins, state );
+
+ implementsServiceAvailable =
+ Classes.assignableTypeSpecification( Availability.class ).test( descriptor() );
+ hasEnabledConfiguration = compositeModel.configurationType() != null
+ && Enabled.class.isAssignableFrom( compositeModel.configurationType() );
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ // NOOP
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ // NOOP
+ }
+
+ @SuppressWarnings( "unchecked" )
+ public boolean isAvailable()
+ {
+ // Check Enabled in configuration first
+ if( hasEnabledConfiguration && !( (Configuration<Enabled>) proxy() ).get().enabled().get() )
+ {
+ return false;
+ }
+
+ // Ask service if it's available
+ return !implementsServiceAvailable || ( (Availability) proxy() ).isAvailable();
+ }
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceModel.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceModel.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceModel.java
new file mode 100644
index 0000000..abbe40b
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceModel.java
@@ -0,0 +1,192 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.lang.reflect.AccessibleObject;
+import java.lang.reflect.ParameterizedType;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Predicate;
+import org.apache.polygene.api.common.MetaInfo;
+import org.apache.polygene.api.common.Visibility;
+import org.apache.polygene.api.configuration.Configuration;
+import org.apache.polygene.api.identity.HasIdentity;
+import org.apache.polygene.api.identity.Identity;
+import org.apache.polygene.api.injection.scope.This;
+import org.apache.polygene.api.property.Property;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.util.Classes;
+import org.apache.polygene.api.util.HierarchicalVisitor;
+import org.apache.polygene.runtime.activation.ActivatorsInstance;
+import org.apache.polygene.runtime.activation.ActivatorsModel;
+import org.apache.polygene.runtime.composite.CompositeMethodsModel;
+import org.apache.polygene.runtime.composite.CompositeModel;
+import org.apache.polygene.runtime.composite.MixinModel;
+import org.apache.polygene.runtime.composite.MixinsModel;
+import org.apache.polygene.runtime.composite.StateModel;
+import org.apache.polygene.runtime.composite.TransientStateInstance;
+import org.apache.polygene.runtime.composite.UsesInstance;
+import org.apache.polygene.runtime.injection.DependencyModel;
+import org.apache.polygene.runtime.injection.InjectionContext;
+import org.apache.polygene.runtime.property.PropertyInstance;
+
+/**
+ * JAVADOC
+ */
+public final class ServiceModel extends CompositeModel
+ implements ServiceDescriptor
+{
+ private final Identity identity;
+ private final boolean instantiateOnStartup;
+ private final ActivatorsModel<?> activatorsModel;
+ private final Class configurationType;
+
+ public ServiceModel( ModuleDescriptor module,
+ List<Class<?>> types,
+ Visibility visibility,
+ MetaInfo metaInfo,
+ ActivatorsModel<?> activatorsModel,
+ MixinsModel mixinsModel,
+ StateModel stateModel,
+ CompositeMethodsModel compositeMethodsModel,
+ Identity identity,
+ boolean instantiateOnStartup
+ )
+ {
+ super( module, types, visibility, metaInfo, mixinsModel, stateModel, compositeMethodsModel );
+
+ this.identity = identity;
+ this.instantiateOnStartup = instantiateOnStartup;
+ this.activatorsModel = activatorsModel;
+
+ // Calculate configuration type
+ this.configurationType = calculateConfigurationType();
+ }
+
+ @Override
+ public boolean isInstantiateOnStartup()
+ {
+ return instantiateOnStartup;
+ }
+
+ @Override
+ public Identity identity()
+ {
+ return identity;
+ }
+
+ @SuppressWarnings( { "raw", "unchecked" } )
+ public ActivatorsInstance<?> newActivatorsInstance( ModuleDescriptor module )
+ throws Exception
+ {
+ return new ActivatorsInstance( activatorsModel.newInstances( module ) );
+ }
+
+ @Override
+ @SuppressWarnings( "unchecked" )
+ public <T> Class<T> configurationType()
+ {
+ return configurationType;
+ }
+
+ @Override
+ public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
+ throws ThrowableType
+ {
+ if( visitor.visitEnter( this ) )
+ {
+ if( activatorsModel.accept( visitor ) )
+ {
+ if( compositeMethodsModel.accept( visitor ) )
+ {
+ if( stateModel.accept( visitor ) )
+ {
+ mixinsModel.accept( visitor );
+ }
+ }
+ }
+ }
+ return visitor.visitLeave( this );
+ }
+
+ public ServiceInstance newInstance( final ModuleDescriptor module )
+ {
+ Object[] mixins = mixinsModel.newMixinHolder();
+
+ Map<AccessibleObject, Property<?>> properties = new HashMap<>();
+ stateModel.properties().forEach( propertyModel -> {
+ Object initialValue = propertyModel.initialValue( module );
+ if( propertyModel.accessor().equals( HasIdentity.IDENTITY_METHOD ) )
+ {
+ initialValue = identity;
+ }
+
+ Property<?> property = new PropertyInstance<>( propertyModel, initialValue );
+ properties.put( propertyModel.accessor(), property );
+ } );
+
+ TransientStateInstance state = new TransientStateInstance( properties );
+ ServiceInstance compositeInstance = new ServiceInstance( this, mixins, state );
+
+ // Instantiate all mixins
+ int i = 0;
+ UsesInstance uses = UsesInstance.EMPTY_USES.use( this );
+ InjectionContext injectionContext = new InjectionContext( compositeInstance, uses, state );
+ for( MixinModel mixinModel : mixinsModel.mixinModels() )
+ {
+ mixins[ i++ ] = mixinModel.newInstance( injectionContext );
+ }
+
+ return compositeInstance;
+ }
+
+ @Override
+ public String toString()
+ {
+ return super.toString() + ":" + identity;
+ }
+
+ @SuppressWarnings( { "raw", "unchecked" } )
+ public Class calculateConfigurationType()
+ {
+ DependencyModel.ScopeSpecification thisSpec = new DependencyModel.ScopeSpecification( This.class );
+ Predicate<DependencyModel> configurationCheck = item -> item.rawInjectionType().equals( Configuration.class );
+ return dependencies().filter( thisSpec.and( configurationCheck ) )
+ .filter( dependencyModel -> dependencyModel.rawInjectionType().equals( Configuration.class ) )
+ .filter( dependencyModel -> dependencyModel.injectionType() instanceof ParameterizedType )
+ .map( dependencyModel -> Classes.RAW_CLASS.apply( ( (ParameterizedType) dependencyModel.injectionType() ).getActualTypeArguments()[ 0 ] ) )
+ .reduce( null, ( injectionClass, type ) -> {
+ if( injectionClass == null )
+ {
+ injectionClass = type;
+ }
+ else
+ {
+ if( injectionClass.isAssignableFrom( type ) )
+ {
+ injectionClass = type;
+ }
+ }
+ return injectionClass;
+ } );
+ }
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceReferenceInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceReferenceInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceReferenceInstance.java
new file mode 100644
index 0000000..e6e53bd
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServiceReferenceInstance.java
@@ -0,0 +1,323 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.lang.reflect.Method;
+import java.util.stream.Stream;
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationEventListener;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.common.Visibility;
+import org.apache.polygene.api.composite.CompositeDescriptor;
+import org.apache.polygene.api.composite.CompositeInstance;
+import org.apache.polygene.api.composite.ModelDescriptor;
+import org.apache.polygene.api.identity.Identity;
+import org.apache.polygene.api.property.StateHolder;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.service.ServiceImporterException;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.api.service.ServiceUnavailableException;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.runtime.activation.ActivationDelegate;
+
+/**
+ * Implementation of ServiceReference.
+ * <p>
+ * This manages the actual instance of the service and implements the service Activation.
+ * </p>
+ * <p>
+ * Whenever the service is requested a proxy is returned which points to this class. This means
+ * that the instance can be passivated even though a client is holding on to a service proxy.
+ * </p>
+ * @param <T> Service Type
+ */
+public final class ServiceReferenceInstance<T>
+ implements ServiceReference<T>, Activation, ModelDescriptor
+{
+ private volatile ServiceInstance instance;
+ private final T serviceProxy;
+ private final ModuleDescriptor module;
+ private final ServiceModel serviceModel;
+ private final ActivationDelegate activation = new ActivationDelegate( this );
+ private boolean active = false;
+
+ ServiceReferenceInstance( ServiceModel serviceModel, ModuleDescriptor module )
+ {
+ this.module = module;
+ this.serviceModel = serviceModel;
+
+ serviceProxy = newProxy();
+ }
+
+ @Override
+ public Identity identity()
+ {
+ return serviceModel.identity();
+ }
+
+ @Override
+ public Stream<Class<?>> types()
+ {
+ return serviceModel.types();
+ }
+
+ @Override
+ public <M> M metaInfo( Class<M> infoType )
+ {
+ return serviceModel.metaInfo( infoType );
+ }
+
+ @Override
+ public synchronized T get()
+ {
+ return serviceProxy;
+ }
+
+ @Override
+ public boolean isActive()
+ {
+ return active;
+ }
+
+ @Override
+ public boolean isAvailable()
+ {
+ return getInstance().isAvailable();
+ }
+
+ @Override
+ public ModelDescriptor model()
+ {
+ return serviceModel;
+ }
+
+ public ModuleDescriptor module()
+ {
+ return module;
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ if( serviceModel.isInstantiateOnStartup() )
+ {
+ getInstance();
+ }
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ if( instance != null )
+ {
+ try {
+ activation.passivate( () -> active = false );
+ } finally {
+ instance = null;
+ active = false;
+ }
+ }
+ }
+
+ private ServiceInstance getInstance()
+ throws ServiceImporterException
+ {
+ // DCL that works with Java 1.5 volatile semantics
+ if( instance == null )
+ {
+ synchronized( this )
+ {
+ if( instance == null )
+ {
+ instance = serviceModel.newInstance( module );
+
+ try
+ {
+ activation.activate( serviceModel.newActivatorsInstance( module ),
+ instance,
+ () -> active = true );
+ }
+ catch( Exception e )
+ {
+ instance = null;
+ throw new ServiceUnavailableException( "Could not activate service " + serviceModel.identity(), e );
+ }
+ }
+ }
+ }
+
+ return instance;
+ }
+
+ @Override
+ public String toString()
+ {
+ return serviceModel.identity() + "(active=" + isActive() + ",module='" + module.name() + "')";
+ }
+
+ @SuppressWarnings( "unchecked" )
+ public T newProxy()
+ {
+ return (T) serviceModel.newProxy( new ServiceReferenceInstance.ServiceInvocationHandler() );
+ }
+
+ public ServiceDescriptor serviceDescriptor()
+ {
+ return serviceModel;
+ }
+
+ @Override
+ public Visibility visibility()
+ {
+ return serviceModel.visibility();
+ }
+
+ @Override
+ public boolean isAssignableTo( Class<?> type )
+ {
+ return serviceModel.isAssignableTo( type );
+ }
+
+ public final class ServiceInvocationHandler
+ implements CompositeInstance
+ {
+ @Override
+ @SuppressWarnings( "unchecked" )
+ public <P> P proxy()
+ {
+ return (P) ServiceReferenceInstance.this.get();
+ }
+
+ @Override
+ public <P> P newProxy( Class<P> mixinType )
+ throws IllegalArgumentException
+ {
+ return getInstance().newProxy( mixinType );
+ }
+
+ @Override
+ public <M> M metaInfo( Class<M> infoType )
+ {
+ return ServiceReferenceInstance.this.metaInfo( infoType );
+ }
+
+ @Override
+ public Stream<Class<?>> types()
+ {
+ return ServiceReferenceInstance.this.types();
+ }
+
+ @Override
+ public CompositeDescriptor descriptor()
+ {
+ return ServiceReferenceInstance.this.serviceDescriptor();
+ }
+
+ @Override
+ public Object invokeComposite( Method method, Object[] args )
+ throws Throwable
+ {
+ return getInstance().invokeComposite( method, args );
+ }
+
+ @Override
+ public StateHolder state()
+ {
+ return getInstance().state();
+ }
+
+ @Override
+ public Object invoke( Object object, Method method, Object[] objects )
+ throws Throwable
+ {
+ if( method.getDeclaringClass().equals( Object.class ) )
+ {
+ switch( method.getName() )
+ {
+ case "toString":
+ return serviceModel.toString();
+ case "equals":
+ return objects[0] == object;
+ case "hashCode":
+ return serviceModel.toString().hashCode();
+ }
+ }
+
+ ServiceInstance instance = getInstance();
+
+/*
+ if (!instance.isAvailable())
+ {
+ throw new ServiceUnavailableException("Service is currently not available");
+ }
+
+*/
+ return instance.invoke( object, method, objects );
+ }
+
+ @Override
+ public String toString()
+ {
+ return serviceModel.toString();
+ }
+
+ @Override
+ public ModuleDescriptor module()
+ {
+ return module;
+ }
+ }
+
+ @Override
+ public void registerActivationEventListener( ActivationEventListener listener )
+ {
+ activation.registerActivationEventListener( listener );
+ }
+
+ @Override
+ public void deregisterActivationEventListener( ActivationEventListener listener )
+ {
+ activation.deregisterActivationEventListener( listener );
+ }
+
+ @Override
+ public int hashCode()
+ {
+ return identity().hashCode();
+ }
+
+ @Override
+ @SuppressWarnings( "raw" )
+ public boolean equals( Object obj )
+ {
+ if ( obj == null ) {
+ return false;
+ }
+ if ( getClass() != obj.getClass() ) {
+ return false;
+ }
+ final ServiceReference other = ( ServiceReference ) obj;
+ return identity().equals( other.identity() );
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesInstance.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesInstance.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesInstance.java
new file mode 100644
index 0000000..c40a74a
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesInstance.java
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+package org.apache.polygene.runtime.service;
+
+import java.util.List;
+import java.util.stream.Stream;
+import org.apache.polygene.api.activation.Activation;
+import org.apache.polygene.api.activation.ActivationEventListener;
+import org.apache.polygene.api.activation.ActivationEventListenerRegistration;
+import org.apache.polygene.api.activation.ActivationException;
+import org.apache.polygene.api.activation.PassivationException;
+import org.apache.polygene.api.common.Visibility;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.runtime.activation.ActivationDelegate;
+import org.apache.polygene.runtime.activation.ActivatorsInstance;
+
+import static java.util.stream.Collectors.toList;
+
+/**
+ * JAVADOC
+ */
+public class ServicesInstance
+ implements Activation, ActivationEventListenerRegistration
+{
+ private final ServicesModel servicesModel;
+ private final List<ServiceReference<?>> serviceReferences;
+ private final ActivationDelegate activation = new ActivationDelegate( this, false );
+
+ public ServicesInstance( ServicesModel servicesModel, List<ServiceReference<?>> serviceReferences )
+ {
+ this.servicesModel = servicesModel;
+ this.serviceReferences = serviceReferences;
+ for( ServiceReference serviceReference : serviceReferences )
+ {
+ serviceReference.registerActivationEventListener( activation );
+ }
+ }
+
+ public Stream<? extends ServiceDescriptor> models()
+ {
+ return servicesModel.models();
+ }
+
+ @Override
+ public void activate()
+ throws ActivationException
+ {
+ Iterable<Activation> activatees = serviceReferences.stream().filter( Activation.class::isInstance )
+ .map( Activation.class::cast )
+ .collect( toList() );
+ activation.activate( ActivatorsInstance.EMPTY, activatees );
+ }
+
+ @Override
+ public void passivate()
+ throws PassivationException
+ {
+ activation.passivate();
+ }
+
+ public Stream<ServiceReference<?>> visibleServices( final Visibility visibility )
+ {
+ return serviceReferences.stream()
+ .filter( item -> ( (ServiceReferenceInstance) item ).serviceDescriptor()
+ .visibility().ordinal() >= visibility.ordinal() );
+ }
+
+ @Override
+ public String toString()
+ {
+ StringBuilder sb = new StringBuilder( "Services{" );
+ String sep = " ";
+ for( ServiceReference serviceReference : serviceReferences )
+ {
+ sb.append( sep ).
+ append( serviceReference.identity() ).
+ append( "(active=" ).append( serviceReference.isActive() ).append( ")" );
+ sep = ", ";
+ }
+ return sb.append( " }" ).toString();
+ }
+
+ @Override
+ public void registerActivationEventListener( ActivationEventListener listener )
+ {
+ activation.registerActivationEventListener( listener );
+ }
+
+ @Override
+ public void deregisterActivationEventListener( ActivationEventListener listener )
+ {
+ activation.deregisterActivationEventListener( listener );
+ }
+
+ public Stream<? extends ServiceDescriptor> descriptors()
+ {
+ return servicesModel.models();
+ }
+
+ public Stream<ServiceReference<?>> references()
+ {
+ return serviceReferences.stream();
+ }
+}
http://git-wip-us.apache.org/repos/asf/zest-java/blob/1c722f44/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesModel.java
----------------------------------------------------------------------
diff --git a/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesModel.java b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesModel.java
new file mode 100644
index 0000000..ebdf64c
--- /dev/null
+++ b/core/runtime/src/main/java/org/apache/polygene/runtime/service/ServicesModel.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ */
+
+package org.apache.polygene.runtime.service;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Stream;
+import org.apache.polygene.api.service.ServiceDescriptor;
+import org.apache.polygene.api.service.ServiceReference;
+import org.apache.polygene.api.structure.ModuleDescriptor;
+import org.apache.polygene.api.util.HierarchicalVisitor;
+import org.apache.polygene.api.util.VisitableHierarchy;
+
+/**
+ * JAVADOC
+ */
+public class ServicesModel
+ implements VisitableHierarchy<Object, Object>
+{
+ private final List<ServiceModel> serviceModels;
+
+ public ServicesModel( List<ServiceModel> serviceModels )
+ {
+ this.serviceModels = serviceModels;
+ }
+
+ public ServicesInstance newInstance( ModuleDescriptor module )
+ {
+ List<ServiceReference<?>> serviceReferences = new ArrayList<>();
+ for( ServiceModel serviceModel : serviceModels )
+ {
+ ServiceReferenceInstance serviceReferenceInstance = new ServiceReferenceInstance( serviceModel, module );
+ serviceReferences.add( serviceReferenceInstance );
+ }
+
+ return new ServicesInstance( this, serviceReferences );
+ }
+
+ @Override
+ public <ThrowableType extends Throwable> boolean accept( HierarchicalVisitor<? super Object, ? super Object, ThrowableType> visitor )
+ throws ThrowableType
+ {
+ if( visitor.visitEnter( this ) )
+ {
+ for( ServiceModel serviceModel : serviceModels )
+ {
+ if( !serviceModel.accept( visitor ) )
+ {
+ break;
+ }
+ }
+ }
+ return visitor.visitLeave( this );
+ }
+
+ public Stream<? extends ServiceDescriptor> models()
+ {
+ return serviceModels.stream();
+ }
+
+ public boolean contains( Class<?> type )
+ {
+ for( ServiceModel model : serviceModels )
+ {
+ if( model.hasType( type ) )
+ {
+ return true;
+ }
+ }
+ return false;
+ }
+}