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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 org.apache.tuscany.sdo.lib;
import java.util.AbstractList;
import java.util.Collections;
import java.util.List;
import commonj.sdo.DataObject;
public class UnknownPropertyList extends AbstractList {
protected List delegateList = Collections.EMPTY_LIST;
protected DataObject dataObject;
protected String path;
public UnknownPropertyList(DataObject dataObject, String path) {
this.dataObject = dataObject;
this.path = path;
}
public Object get(int index) {
return getDelegateList().get(index);
}
public int size() {
return getDelegateList().size();
}
public Object remove(int index) {
return getDelegateList().remove(index);
}
public Object set(int index, Object element) {
return getDelegateList().set(index, element);
}
public void add(int index, Object element) {
if (getDelegateList() == Collections.EMPTY_LIST && index == 0) {
dataObject.set(path, Collections.singletonList(element));
delegateList = (List)dataObject.get(path);
}
else {
delegateList.add(index, element);
}
}
protected List getDelegateList() {
if (delegateList == Collections.EMPTY_LIST) {
List propertyList = (List)dataObject.get(path);
if (propertyList != null) delegateList = propertyList;
}
return delegateList;
}
}
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