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Posted to commits@commons.apache.org by si...@apache.org on 2011/05/13 09:33:06 UTC
svn commit: r1102591 -
/commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java
Author: simonetripodi
Date: Fri May 13 07:33:06 2011
New Revision: 1102591
URL: http://svn.apache.org/viewvc?rev=1102591&view=rev
Log:
first checkin of FromBinderRuleSet class
Added:
commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java (with props)
Added: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java
URL: http://svn.apache.org/viewvc/commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java?rev=1102591&view=auto
==============================================================================
--- commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java (added)
+++ commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java Fri May 13 07:33:06 2011
@@ -0,0 +1,223 @@
+/* $Id$
+ *
+ * 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.binder;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Map;
+
+import org.apache.commons.digester3.Digester;
+import org.apache.commons.digester3.Rule;
+import org.apache.commons.digester3.RuleSet;
+
+/**
+ * {@link RuleSet} implementation that allows register {@link RuleProvider} instances
+ * and add rules to the {@link Digester}.
+ *
+ * @since 3.0
+ */
+final class FromBinderRuleSet
+ implements RuleSet
+{
+
+ /**
+ * The data structure where storing the providers binding.
+ */
+ private final Collection<RuleProvider<? extends Rule>> providers = new LinkedList<RuleProvider<? extends Rule>>();
+
+ /**
+ * Index for quick-retrieve provider.
+ */
+ private final Map<Key, Collection<RuleProvider<? extends Rule>>> providersIndex =
+ new HashMap<Key, Collection<RuleProvider<? extends Rule>>>();
+
+ /**
+ *
+ *
+ * @param <R>
+ * @param <RP>
+ * @param provider
+ */
+ public <R extends Rule, RP extends RuleProvider<R>> void registerProvider( RP provider )
+ {
+ this.providers.add( provider );
+
+ Key key = new Key( provider.getPattern(), provider.getNamespaceURI() );
+
+ Collection<RuleProvider<? extends Rule>> indexedProviders = this.providersIndex.get( key ); // O(1)
+ if ( indexedProviders == null )
+ {
+ indexedProviders = new ArrayList<RuleProvider<? extends Rule>>(); // O(1)
+ this.providersIndex.put( key, indexedProviders );
+ }
+ indexedProviders.add( provider );
+ }
+
+ /**
+ *
+ *
+ * @param <R>
+ * @param <RP>
+ * @param keyPattern
+ * @param namespaceURI
+ * @param type
+ * @return
+ */
+ public <R extends Rule, RP extends RuleProvider<R>> RP getProvider( String keyPattern,
+ /* @Nullable */String namespaceURI, Class<RP> type )
+ {
+ Key key = new Key( keyPattern, namespaceURI );
+
+ Collection<RuleProvider<? extends Rule>> indexedProviders = this.providersIndex.get( key ); // O(1)
+
+ if ( indexedProviders == null || indexedProviders.isEmpty() )
+ {
+ return null;
+ }
+
+ for ( RuleProvider<? extends Rule> ruleProvider : indexedProviders ) // FIXME O(n) not so good
+ {
+ if ( type.isInstance( ruleProvider ) )
+ {
+ return type.cast( ruleProvider );
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void addRuleInstances( Digester digester )
+ {
+ for ( RuleProvider<? extends Rule> provider : providers ) {
+ digester.addRule( provider.getPattern(), provider.get() );
+ }
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public String getNamespaceURI()
+ {
+ return null;
+ }
+
+ /**
+ * Used to associate pattern/namespaceURI
+ */
+ private static final class Key
+ {
+
+ private final String pattern;
+
+ private final String namespaceURI;
+
+ public Key( String pattern, String namespaceURI )
+ {
+ this.pattern = pattern;
+ this.namespaceURI = namespaceURI;
+ }
+
+ public String getPattern()
+ {
+ return pattern;
+ }
+
+ public String getNamespaceURI()
+ {
+ return namespaceURI;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public int hashCode()
+ {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + ( ( namespaceURI == null ) ? 0 : namespaceURI.hashCode() );
+ result = prime * result + ( ( pattern == null ) ? 0 : pattern.hashCode() );
+ return result;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public boolean equals( Object obj )
+ {
+ if ( this == obj )
+ {
+ return true;
+ }
+
+ if ( obj == null )
+ {
+ return false;
+ }
+
+ if ( getClass() != obj.getClass() )
+ {
+ return false;
+ }
+
+ Key other = (Key) obj;
+ if ( namespaceURI == null )
+ {
+ if ( other.getNamespaceURI() != null )
+ {
+ return false;
+ }
+ }
+ else if ( !namespaceURI.equals( other.getNamespaceURI() ) )
+ {
+ return false;
+ }
+
+ if ( pattern == null )
+ {
+ if ( other.getPattern() != null )
+ {
+ return false;
+ }
+ }
+ else if ( !pattern.equals( other.getPattern() ) )
+ {
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public String toString()
+ {
+ return "Key [pattern=" + pattern + ", namespaceURI=" + namespaceURI + "]";
+ }
+
+ }
+
+}
Propchange: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java
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Propchange: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java
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Propchange: commons/sandbox/digester3/trunk/src/main/java/org/apache/commons/digester3/binder/FromBinderRuleSet.java
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