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Posted to commits@commons.apache.org by si...@apache.org on 2010/01/13 22:51:05 UTC
svn commit: r898948 -
/commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java
Author: simonetripodi
Date: Wed Jan 13 21:51:05 2010
New Revision: 898948
URL: http://svn.apache.org/viewvc?rev=898948&view=rev
Log:
first checkin of MethodHandler class
Added:
commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java (with props)
Added: commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java
URL: http://svn.apache.org/viewvc/commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java?rev=898948&view=auto
==============================================================================
--- commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java (added)
+++ commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java Wed Jan 13 21:51:05 2010
@@ -0,0 +1,137 @@
+/*
+ * 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.digester.annotations.handlers;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+
+import org.apache.commons.digester.annotations.CreationRule;
+import org.apache.commons.digester.annotations.DigesterLoader;
+import org.apache.commons.digester.annotations.DigesterLoaderHandler;
+import org.apache.commons.digester.annotations.DigesterRule;
+import org.apache.commons.digester.annotations.DigesterRuleList;
+import org.apache.commons.digester.annotations.FromAnnotationsRuleSet;
+import org.apache.commons.digester.annotations.utils.AnnotationUtils;
+
+/**
+ * Handler that takes care to create the
+ * {@link org.apache.commons.digester.annotations.providers.SetNextRuleProviderRuleProvider}.
+ *
+ * @version $Id$
+ * @since 2.1
+ */
+public final class MethodHandler implements DigesterLoaderHandler<Annotation, Method> {
+
+ /**
+ * The default args size the method has to have in order to be analyzed.
+ */
+ private static final int SUPPORTED_ARGS = 1;
+
+ /**
+ *
+ */
+ private DefaultLoaderHandler defaultLoaderHandler = new DefaultLoaderHandler();
+
+ /**
+ * {@inheritDoc}
+ */
+ public void handle(Annotation annotation, Method element, FromAnnotationsRuleSet ruleSet) {
+ if (SUPPORTED_ARGS != element.getParameterTypes().length) {
+ DigesterRule rule = annotation.annotationType().getAnnotation(DigesterRule.class);
+
+ throw new IllegalArgumentException("Methods annotated with digester annotation rule @"
+ + rule.reflectsRule().getName()
+ + " must have just one argument");
+ }
+
+ Object explicitTypesObject = AnnotationUtils.getAnnotationValue(annotation);
+ if (explicitTypesObject == null
+ || !explicitTypesObject.getClass().isArray()
+ || Class.class != explicitTypesObject.getClass().getComponentType()) {
+ throw new IllegalArgumentException("Impossible to apply this handler, @"
+ + annotation.getClass().getName()
+ + ".value() has to be of type 'Class<?>[]'");
+ }
+
+ Class<?>[] explicitTypes = (Class<?>[]) explicitTypesObject;
+ Class<?> paramType = element.getParameterTypes()[0];
+
+ if (explicitTypes.length > 0) {
+ for (Class<?> explicitType : explicitTypes) {
+ if (!paramType.isAssignableFrom(explicitType)) {
+ throw new IllegalArgumentException("Impossible to handle annotation "
+ + annotation
+ + " on method "
+ + element.toGenericString()
+ + ", "
+ + explicitType.getName()
+ + " has to be a "
+ + paramType.getName());
+ }
+
+ this.doHandle(element, explicitType, ruleSet);
+ }
+ } else {
+ this.doHandle(element, paramType, ruleSet);
+ }
+ }
+
+ /**
+ *
+ *
+ * @param method
+ * @param type
+ * @param ruleSet
+ */
+ private void doHandle(Method method, Class<?> type, FromAnnotationsRuleSet ruleSet) {
+ if (type.isInterface()
+ && Modifier.isAbstract(type.getModifiers())) {
+ throw new IllegalArgumentException("");
+ }
+
+ for (Annotation annotation : type.getAnnotations()) {
+ this.doHandle(annotation, method, type, ruleSet);
+ }
+ }
+
+ /**
+ *
+ *
+ * @param annotation
+ * @param method
+ * @param type
+ * @param ruleSet
+ */
+ private void doHandle(Annotation annotation, Method method, Class<?> type, FromAnnotationsRuleSet ruleSet) {
+ if (annotation.annotationType().isAnnotationPresent(DigesterRule.class)
+ && annotation.annotationType().isAnnotationPresent(CreationRule.class)) {
+ DigesterLoader.addRules(type, ruleSet);
+ this.defaultLoaderHandler.handle(annotation, method, ruleSet);
+ } else if (annotation.annotationType().isAnnotationPresent(DigesterRuleList.class)) {
+ // check if it is one of the *.List annotation
+ Annotation[] annotations = AnnotationUtils.getAnnotationsArrayValue(annotation);
+ if (annotations != null) {
+ // if it is an annotations array, process them
+ for (Annotation ptr : annotations) {
+ this.doHandle(ptr, method, type, ruleSet);
+ }
+ }
+ }
+ }
+
+}
Propchange: commons/sandbox/at-digester/trunk/src/java/org/apache/commons/digester/annotations/handlers/MethodHandler.java
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