Author: simonetripodi
Date: Sat Jan 30 17:26:02 2010
New Revision: 904819
URL: http://svn.apache.org/viewvc?rev=904819&view=rev
Log:
first checkin of AbstractAliasBeanInfo class
Added:
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
(with props)
Added:
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
URL:
http://svn.apache.org/viewvc/labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java?rev=904819&view=auto
==============================================================================
---
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
(added)
+++
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
Sat Jan 30 17:26:02 2010
@@ -0,0 +1,115 @@
+/*
+ * 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.labs.amber.signature.beaninfo;
+
+import java.beans.PropertyDescriptor;
+import java.beans.SimpleBeanInfo;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.beanutils.MethodUtils;
+
+/**
+ * Abstract BeanInfo implementation that exposes class properties with aliases.
+ *
+ * @version $Id$
+ */
+public abstract class AbstractAliasBeanInfo extends SimpleBeanInfo {
+
+ /**
+ * Maintains the original descriptors and the alias descriptor.
+ */
+ private final List<PropertyDescriptor> descriptors = new
ArrayList<PropertyDescriptor>();
+
+ /**
+ * Scans the class hierarchy and associates the property field to alias.
+ *
+ * @param klass the class is currently analyzed.
+ * @param annotationType the annotation type that contains the alias name.
+ * @param aliasPropertyName the annotation property name that contains the
+ * property alias.
+ */
+ public AbstractAliasBeanInfo(Class<?> klass,
+ Class<? extends Annotation> annotationType,
+ String aliasPropertyName) {
+ this.visit(klass, annotationType, aliasPropertyName);
+ }
+
+ /**
+ * Scans the class hierarchy and associates the property field to alias.
+ *
+ * @param klass the class is currently analyzed.
+ * @param annotationType the annotation type that contains the alias name.
+ * @param aliasPropertyName the annotation property name that contains the
+ * property alias.
+ */
+ private void visit(Class<?> klass,
+ Class<? extends Annotation> annotationType,
+ String aliasPropertyName) {
+ if (Object.class == klass) {
+ return;
+ }
+
+ for (Field field : klass.getDeclaredFields()) {
+ try {
+ PropertyDescriptor originalDescriptor = new
PropertyDescriptor(field.getName(), klass);
+ this.descriptors.add(originalDescriptor);
+
+ if (field.isAnnotationPresent(annotationType)) {
+ Annotation annotation =
field.getAnnotation(annotationType);
+ Object alias = MethodUtils.invokeExactMethod(annotation,
aliasPropertyName, null);
+
+ if (alias == null) {
+ throw new IllegalArgumentException("'"
+ + aliasPropertyName
+ + "' on "
+ + annotation
+ + " must not be null");
+ }
+
+ if (String.class != alias.getClass()) {
+ throw new IllegalArgumentException("'"
+ + aliasPropertyName
+ + "' on "
+ + annotation
+ + " is not a string");
+ }
+
+ PropertyDescriptor aliasDescriptor = new
PropertyDescriptor(String.valueOf(alias),
+ originalDescriptor.getReadMethod(),
+ originalDescriptor.getWriteMethod());
+ this.descriptors.add(aliasDescriptor);
+ }
+ } catch (Exception e) {
+ // TODO can this exception be ignored?
+ }
+ }
+
+ this.visit(klass.getSuperclass(), annotationType, aliasPropertyName);
+ }
+
+ /**
+ * {...@inheritdoc}
+ */
+ @Override
+ public PropertyDescriptor[] getPropertyDescriptors() {
+ return this.descriptors.toArray(new
PropertyDescriptor[this.descriptors.size()]);
+ }
+
+}
Propchange:
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
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Propchange:
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
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svn:keywords = Date Author Id Revision HeadURL
Propchange:
labs/amber/signature-api/src/main/java/org/apache/labs/amber/signature/beaninfo/AbstractAliasBeanInfo.java
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