/*
 *  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;

/**
 * A matcher that matches nothing.
 */
public final/* @Immutable */class NoMatcher implements Matcher {

    public static final Matcher INSTANCE = new NoMatcher();

    public NoMatcher() {
    }

    public boolean matches(String input) {
        if (input == null) {
            throw new NullPointerException();
        }
        return false;
    }

    public boolean isExact() {
        return true;
    }

}