001/*
002 * Copyright (C) 2009-2011 Mathias Doenitz
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.parboiled.matchers;
018
019import org.parboiled.MatcherContext;
020import org.parboiled.matchervisitors.MatcherVisitor;
021import org.parboiled.support.Characters;
022
023import static org.parboiled.common.Preconditions.checkArgNotNull;
024import static org.parboiled.common.Preconditions.checkArgument;
025
026/**
027 * A {@link Matcher} matching a single character out of a given {@link Characters} set.
028 */
029public class AnyOfMatcher extends AbstractMatcher {
030    public final Characters characters;
031
032    public AnyOfMatcher(Characters characters) {
033        super(checkArgNotNull(characters, "characters").toString());
034        checkArgument(!characters.equals(Characters.NONE));
035        this.characters = characters;
036    }
037
038    public boolean match(MatcherContext context) {
039        if (!characters.contains(context.getCurrentChar())) return false;
040        context.advanceIndex(1);
041        context.createNode();
042        return true;
043    }
044
045    public <R> R accept(MatcherVisitor<R> visitor) {
046        checkArgNotNull(visitor, "visitor");
047        return visitor.visit(this);
048    }
049
050}