org.apache.shale.test.mock.MockPropertyResolver Maven / Gradle / Ivy
/*
* 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.shale.test.mock;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
import javax.faces.el.EvaluationException;
import javax.faces.el.PropertyNotFoundException;
import javax.faces.el.PropertyResolver;
/**
* Mock implementation of PropertyResolver.
*
* $Id$
*/
public class MockPropertyResolver extends PropertyResolver {
// ------------------------------------------------------------ Constructors
/**
* Construct a default instance.
*/
public MockPropertyResolver() {
}
// ----------------------------------------------------- Mock Object Methods
// ------------------------------------------------------ Instance Variables
// ------------------------------------------------ PropertyResolver Methods
/** {@inheritDoc} */
public Object getValue(Object base, Object property)
throws EvaluationException, PropertyNotFoundException {
if (base == null) {
throw new NullPointerException();
}
if (base instanceof Map) {
return ((Map) base).get(property);
}
String name = property.toString();
PropertyDescriptor descriptor = descriptor(base.getClass(), name);
try {
return descriptor.getReadMethod().invoke(base, (Object[]) null);
} catch (IllegalAccessException e) {
throw new EvaluationException(e);
} catch (InvocationTargetException e) {
throw new EvaluationException(e.getTargetException());
}
}
/** {@inheritDoc} */
public Object getValue(Object base, int index)
throws PropertyNotFoundException {
return getValue(base, "" + index);
}
/** {@inheritDoc} */
public void setValue(Object base, Object property, Object value)
throws PropertyNotFoundException {
if (base == null) {
throw new NullPointerException();
}
if (base instanceof Map) {
((Map) base).put(property, value);
return;
}
String name = property.toString();
PropertyDescriptor descriptor = descriptor(base.getClass(), name);
try {
descriptor.getWriteMethod().invoke(base, new Object[] { value });
} catch (IllegalAccessException e) {
throw new EvaluationException(e);
} catch (InvocationTargetException e) {
throw new EvaluationException(e.getTargetException());
}
}
/** {@inheritDoc} */
public void setValue(Object base, int index, Object value)
throws PropertyNotFoundException {
setValue(base, "" + index, value);
}
/** {@inheritDoc} */
public boolean isReadOnly(Object base, Object property)
throws PropertyNotFoundException {
if (base == null) {
throw new NullPointerException();
}
if (base instanceof Map) {
return false; // We have no way to know anything more specific
}
String name = property.toString();
PropertyDescriptor descriptor = descriptor(base.getClass(), name);
return (descriptor.getWriteMethod() == null);
}
/** {@inheritDoc} */
public boolean isReadOnly(Object base, int index)
throws PropertyNotFoundException {
return isReadOnly(base, "" + index);
}
/** {@inheritDoc} */
public Class getType(Object base, Object property)
throws PropertyNotFoundException {
if (base == null) {
throw new NullPointerException();
}
if (base instanceof Map) {
Object value = ((Map) base).get(property);
if (value != null) {
return value.getClass();
} else {
return Object.class;
}
}
String name = property.toString();
PropertyDescriptor descriptor = descriptor(base.getClass(), name);
return descriptor.getPropertyType();
}
/** {@inheritDoc} */
public Class getType(Object base, int index)
throws PropertyNotFoundException {
return getType(base, "" + index);
}
// --------------------------------------------------------- Private Methods
/**
* Return the PropertyDescriptor for the specified
* property of the specified class.
*
* @param clazz Class from which to extract a property descriptor
* @param name Name of the desired property
*
* @exception EvaluationException if we cannot access the introspecition
* information for this class
* @exception PropertyNotFoundException if the specified property does
* not exist on the specified class
*/
private PropertyDescriptor descriptor(Class clazz, String name) {
System.err.println("descriptor(class=" + clazz.getName() + ", name=" + name);
BeanInfo info = null;
try {
info = Introspector.getBeanInfo(clazz);
System.err.println(" Found BeanInfo " + info);
} catch (IntrospectionException e) {
throw new EvaluationException(e);
}
PropertyDescriptor[] descriptors = info.getPropertyDescriptors();
for (int i = 0; i < descriptors.length; i++) {
if (name.equals(descriptors[i].getName())) {
System.err.print(" Found PropertyDescriptor " + descriptors[i]);
return descriptors[i];
}
}
System.err.print(" No property descriptor for property " + name);
throw new PropertyNotFoundException(name);
}
}