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Posted to commits@commons.apache.org by si...@apache.org on 2011/05/24 07:58:00 UTC
svn commit: r1126882 -
/commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java
Author: simonetripodi
Date: Tue May 24 05:58:00 2011
New Revision: 1126882
URL: http://svn.apache.org/viewvc?rev=1126882&view=rev
Log:
first checkin of AbstractMethodHandler class
Added:
commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java (with props)
Added: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java
URL: http://svn.apache.org/viewvc/commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java?rev=1126882&view=auto
==============================================================================
--- commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java (added)
+++ commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java Tue May 24 05:58:00 2011
@@ -0,0 +1,149 @@
+/* $Id$
+ *
+ * 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.commons.digester3.annotations.handlers;
+
+import static org.apache.commons.digester3.annotations.utils.AnnotationUtils.*;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import org.apache.commons.digester3.binder.RulesBinder;
+import org.apache.commons.digester3.annotations.AnnotationHandler;
+import org.apache.commons.digester3.annotations.DigesterRule;
+import org.apache.commons.digester3.annotations.DigesterRuleList;
+import org.apache.commons.digester3.annotations.FromAnnotationsRuleModule;
+import org.apache.commons.digester3.annotations.rules.CreationRule;
+
+/**
+ * Handler that takes care to create the
+ * {@link org.apache.commons.digester3.annotations.rules.SetNext}
+ * and
+ * {@link org.apache.commons.digester3.annotations.rules.SetRoot}.
+ *
+ * @since 3.0
+ */
+abstract class AbstractMethodHandler<A extends Annotation> implements AnnotationHandler<A, Method> {
+
+ /**
+ * The default args size the method has to have in order to be analyzed.
+ */
+ private static final int SUPPORTED_ARGS = 1;
+
+ /**
+ * {@inheritDoc}
+ */
+ public void handle( A annotation, Method element, RulesBinder rulesBinder )
+ {
+ if ( SUPPORTED_ARGS != element.getParameterTypes().length )
+ {
+ DigesterRule rule = annotation.annotationType().getAnnotation( DigesterRule.class );
+
+ rulesBinder.addError( "Methods annotated with digester annotation rule @%s must have just one argument",
+ rule.reflectsRule().getName() );
+ return;
+ }
+
+ Object explicitTypesObject = getAnnotationValue( annotation );
+ if ( explicitTypesObject == null || !explicitTypesObject.getClass().isArray()
+ || Class.class != explicitTypesObject.getClass().getComponentType() )
+ {
+ rulesBinder.addError( "Impossible to apply this handler, @%s.value() has to be of type 'Class<?>[]'",
+ annotation.getClass().getName() );
+ return;
+ }
+
+ Class<?>[] explicitTypes = (Class<?>[]) explicitTypesObject;
+ Class<?> paramType = element.getParameterTypes()[0];
+
+ if ( explicitTypes.length > 0 )
+ {
+ for ( Class<?> explicitType : explicitTypes )
+ {
+ if ( !paramType.isAssignableFrom( explicitType ) )
+ {
+ rulesBinder.addError( "Impossible to handle annotation %s on method, %s has to be a %s",
+ annotation, element.toGenericString(), explicitType.getName(),
+ paramType.getName() );
+ return;
+ }
+
+ doHandle( annotation, element, explicitType, rulesBinder );
+ }
+ }
+ else
+ {
+ doHandle( annotation, element, paramType, rulesBinder );
+ }
+ }
+
+ private void doHandle( A methodAnnotation, Method method, Class<?> type, RulesBinder rulesBinder )
+ {
+ if ( type.isInterface() && Modifier.isAbstract( type.getModifiers() ) )
+ {
+ rulesBinder.addError( "Impossible to proceed analyzing %s, specified type '%s' is an interface/abstract",
+ methodAnnotation, type.getName() );
+ return;
+ }
+
+ for ( Annotation annotation : type.getAnnotations() )
+ {
+ doHandle( methodAnnotation, annotation, method, type, rulesBinder );
+ }
+ }
+
+ private void doHandle( A methodAnnotation, Annotation annotation, Method method, final Class<?> type,
+ RulesBinder rulesBinder )
+ {
+ if ( annotation.annotationType().isAnnotationPresent( DigesterRule.class )
+ && annotation.annotationType().isAnnotationPresent( CreationRule.class ) )
+ {
+ rulesBinder.install( new FromAnnotationsRuleModule()
+ {
+
+ @Override
+ protected void configure()
+ {
+ bindRulesFrom( type );
+ }
+
+ } );
+
+ String pattern = getAnnotationPattern( annotation );
+ String namespaceURI = getAnnotationNamespaceURI( annotation );
+ doBind( pattern, namespaceURI, method, type, rulesBinder );
+ }
+ else if ( annotation.annotationType().isAnnotationPresent( DigesterRuleList.class ) )
+ {
+ // check if it is one of the *.List annotation
+ Annotation[] annotations = getAnnotationsArrayValue( annotation );
+ if ( annotations != null )
+ {
+ // if it is an annotations array, process them
+ for ( Annotation ptr : annotations )
+ {
+ doHandle( methodAnnotation, ptr, method, type, rulesBinder );
+ }
+ }
+ }
+ }
+
+ protected abstract void doBind( String pattern, String namespaceURI, Method method, Class<?> type,
+ RulesBinder rulesBinder );
+
+}
Propchange: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/annotations/handlers/AbstractMethodHandler.java
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