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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.selectors;
/**
* This selector has one other selectors whose meaning it inverts. It
* actually relies on NoneSelector for its implementation of the
* isSelected() method, but it adds a check to ensure there is only one
* other selector contained within.
*
* @since 1.5
*/
public class NotSelector extends NoneSelector {
/**
* Default constructor.
*/
public NotSelector() {
}
/**
* Constructor that inverts the meaning of its argument.
* @param other the selector to invert
* @since Ant 1.7
*/
public NotSelector(FileSelector other) {
this();
appendSelector(other);
}
/**
* @return a string representation of the selector
*/
public String toString() {
StringBuilder buf = new StringBuilder();
if (hasSelectors()) {
buf.append("{notselect: ");
buf.append(super.toString());
buf.append("}");
}
return buf.toString();
}
/**
* Makes sure that there is only one entry, sets an error message if
* not.
*/
public void verifySettings() {
if (selectorCount() != 1) {
setError("One and only one selector is allowed within the "
+ "<not> tag");
}
}
}
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