/*
* 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.sling.api.wrappers;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.resource.ValueMap;
/**
* A value map wrapper which implements deep reading of properties
* based on the resource tree.
* @since 2.5
*/
public class DeepReadValueMapDecorator extends ValueMapDecorator {
private final String pathPrefix;
private final ResourceResolver resolver;
private final ValueMap base;
public DeepReadValueMapDecorator(final Resource resource, final ValueMap base) {
super(base);
this.pathPrefix = resource.getPath() + "/";
this.resolver = resource.getResourceResolver();
this.base = base;
}
private ValueMap getValueMap(final String name) {
final int pos = name.lastIndexOf("/");
if ( pos == -1 ) {
return this.base;
}
final Resource rsrc = this.resolver.getResource(pathPrefix + name.substring(0, pos));
if ( rsrc != null ) {
final ValueMap vm = rsrc.adaptTo(ValueMap.class);
if ( vm != null ) {
return vm;
}
}
return ValueMap.EMPTY; // fall back
}
private String getPropertyName(final String name) {
final int pos = name.lastIndexOf("/");
if ( pos == -1 ) {
return name;
}
return name.substring(pos + 1);
}
/**
* @see org.apache.sling.api.resource.ValueMap#get(java.lang.String, java.lang.Class)
*/
@Override
public <T> T get(final String name, final Class<T> type) {
return this.getValueMap(name).get(this.getPropertyName(name), type);
}
/**
* @see org.apache.sling.api.resource.ValueMap#get(java.lang.String, java.lang.Object)
*/
@Override
public <T> T get(final String name, T defaultValue) {
return this.getValueMap(name).get(this.getPropertyName(name), defaultValue);
}
/**
* @see org.apache.sling.api.wrappers.ValueMapDecorator#containsKey(java.lang.Object)
*/
@Override
public boolean containsKey(final Object key) {
if ( key == null ) {
return false;
}
final String name = key.toString();
return this.getValueMap(name).containsKey(this.getPropertyName(name));
}
/**
* @see org.apache.sling.api.wrappers.ValueMapDecorator#get(java.lang.Object)
*/
@Override
public Object get(final Object key) {
if ( key == null ) {
return null;
}
final String name = key.toString();
return this.getValueMap(name).get(this.getPropertyName(name));
}
}