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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.tools.ant.types.resources.selectors;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Stack;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.DataType;
/**
* ResourceSelector container.
* @since Ant 1.7
*/
public class ResourceSelectorContainer extends DataType {
private final List<ResourceSelector> resourceSelectors = new ArrayList<ResourceSelector>();
/**
* Default constructor.
*/
public ResourceSelectorContainer() {
}
/**
* Construct a new ResourceSelectorContainer with the specified array of selectors.
* @param r the ResourceSelector[] to add.
*/
public ResourceSelectorContainer(ResourceSelector[] r) {
for (int i = 0; i < r.length; i++) {
add(r[i]);
}
}
/**
* Add a ResourceSelector to the container.
* @param s the ResourceSelector to add.
*/
public void add(ResourceSelector s) {
if (isReference()) {
throw noChildrenAllowed();
}
if (s == null) {
return;
}
resourceSelectors.add(s);
setChecked(false);
}
/**
* Learn whether this ResourceSelectorContainer has selectors.
* @return boolean indicating whether selectors have been added to the container.
*/
public boolean hasSelectors() {
if (isReference()) {
return ((ResourceSelectorContainer) getCheckedRef()).hasSelectors();
}
dieOnCircularReference();
return !resourceSelectors.isEmpty();
}
/**
* Get the count of nested selectors.
* @return the selector count as int.
*/
public int selectorCount() {
if (isReference()) {
return ((ResourceSelectorContainer) getCheckedRef()).selectorCount();
}
dieOnCircularReference();
return resourceSelectors.size();
}
/**
* Return an Iterator over the nested selectors.
* @return Iterator of ResourceSelectors.
*/
public Iterator<ResourceSelector> getSelectors() {
if (isReference()) {
return ((ResourceSelectorContainer) getCheckedRef()).getSelectors();
}
dieOnCircularReference();
return Collections.unmodifiableList(resourceSelectors).iterator();
}
/**
* Overrides the version from DataType to recurse on nested ResourceSelectors.
* @param stk the Stack of references.
* @param p the Project to resolve against.
* @throws BuildException on error.
*/
protected void dieOnCircularReference(Stack<Object> stk, Project p)
throws BuildException {
if (isChecked()) {
return;
}
if (isReference()) {
super.dieOnCircularReference(stk, p);
} else {
for (ResourceSelector resourceSelector : resourceSelectors) {
if (resourceSelector instanceof DataType) {
pushAndInvokeCircularReferenceCheck((DataType) resourceSelector, stk, p);
}
}
setChecked(true);
}
}
}
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