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/*
* 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 javax.el;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import java.util.Objects;
/**
* @since EL 3.0
*/
public class BeanNameELResolver extends ELResolver {
private final BeanNameResolver beanNameResolver;
public BeanNameELResolver(BeanNameResolver beanNameResolver) {
this.beanNameResolver = beanNameResolver;
}
@Override
public Object getValue(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base != null || !(property instanceof String)) {
return null;
}
String beanName = (String) property;
if (beanNameResolver.isNameResolved(beanName)) {
try {
Object result = beanNameResolver.getBean(beanName);
context.setPropertyResolved(base, property);
return result;
} catch (Throwable t) {
Util.handleThrowable(t);
throw new ELException(t);
}
}
return null;
}
@Override
public void setValue(ELContext context, Object base, Object property,
Object value) {
Objects.requireNonNull(context);
if (base != null || !(property instanceof String)) {
return;
}
String beanName = (String) property;
boolean isResolved = context.isPropertyResolved();
boolean isReadOnly;
try {
isReadOnly = isReadOnly(context, base, property);
} catch (Throwable t) {
Util.handleThrowable(t);
throw new ELException(t);
} finally {
context.setPropertyResolved(isResolved);
}
if (isReadOnly) {
throw new PropertyNotWritableException(Util.message(context,
"beanNameELResolver.beanReadOnly", beanName));
}
if (beanNameResolver.isNameResolved(beanName) ||
beanNameResolver.canCreateBean(beanName)) {
try {
beanNameResolver.setBeanValue(beanName, value);
context.setPropertyResolved(base, property);
} catch (Throwable t) {
Util.handleThrowable(t);
throw new ELException(t);
}
}
}
@Override
public Class<?> getType(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base != null || !(property instanceof String)) {
return null;
}
String beanName = (String) property;
try {
if (beanNameResolver.isNameResolved(beanName)) {
Class<?> result = beanNameResolver.getBean(beanName).getClass();
context.setPropertyResolved(base, property);
return result;
}
} catch (Throwable t) {
Util.handleThrowable(t);
throw new ELException(t);
}
return null;
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property) {
Objects.requireNonNull(context);
if (base != null || !(property instanceof String)) {
// Return value undefined
return false;
}
String beanName = (String) property;
if (beanNameResolver.isNameResolved(beanName)) {
boolean result;
try {
result = beanNameResolver.isReadOnly(beanName);
} catch (Throwable t) {
Util.handleThrowable(t);
throw new ELException(t);
}
context.setPropertyResolved(base, property);
return result;
}
// Return value undefined
return false;
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context,
Object base) {
return null;
}
@Override
public Class<?> getCommonPropertyType(ELContext context, Object base) {
return String.class;
}
}
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