org.apache.ivy.plugins.matcher.ExactPatternMatcher Maven / Gradle / Ivy
/*
* 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.ivy.plugins.matcher;
/**
* Implementation of an exact matcher.
*
* The matching will be performed against an expression being a string. It will only matches if both
* strings are equal (per equals()) rule or if both strings are null.
*/
public/* @Immutable */final class ExactPatternMatcher extends AbstractPatternMatcher {
public static final ExactPatternMatcher INSTANCE = new ExactPatternMatcher();
public ExactPatternMatcher() {
super(EXACT);
}
protected Matcher newMatcher(String expression) {
return new ExactMatcher(expression);
}
private static/* @Immutable */class ExactMatcher implements Matcher {
private String expression;
public ExactMatcher(String expression) {
this.expression = expression;
}
public boolean matches(String input) {
if (input == null) {
throw new NullPointerException();
}
return input.equals(expression);
}
public boolean isExact() {
return true;
}
}
}