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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 org.apache.tools.ant.types.Resource;
/**
* Not ResourceSelector.
* @since Ant 1.7
*/
public class Not implements ResourceSelector {
private ResourceSelector sel;
/**
* Default constructor.
*/
public Not() {
}
/**
* Convenience constructor.
* @param s the ResourceSelector to negate.
*/
public Not(ResourceSelector s) {
add(s);
}
/**
* Set the ResourceSelector.
* @param s the ResourceSelector to negate.
* @throws IllegalStateException if already set.
*/
public void add(ResourceSelector s) {
if (sel != null) {
throw new IllegalStateException(
"The Not ResourceSelector accepts a single nested ResourceSelector");
}
sel = s;
}
/**
* Return true if this Resource is selected.
* @param r the Resource to check.
* @return whether the Resource was selected.
*/
public boolean isSelected(Resource r) {
return !(sel.isSelected(r));
}
}
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