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ProGuardCORE is a free library to read, analyze, modify, and write Java class files.

There is a newer version: 9.1.6

/*
 * ProGuardCORE -- library to process Java bytecode.
 *
 * Copyright (c) 2002-2021 Guardsquare NV
 *
 * Licensed 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 proguard.util;

/**
 * This {@link StringMatcher} tests whether strings matches at least one of the given {@link StringMatcher} instances.
 *
 * @author Eric Lafortune
 */
public class OrMatcher extends StringMatcher
{
    private final StringMatcher[] matchers;


    /**
     * Creates a new OrMatcher with the given string matchers.
     */
    public OrMatcher(StringMatcher... matchers)
    {
        this.matchers = matchers;
    }


    // Implementations for StringMatcher.

    @Override
    public String prefix()
    {
        if (this.matchers.length == 0 || this.matchers[0] == null)
            return null;
        if (this.matchers.length == 1)
            return this.matchers[0].prefix();
        // TODO(T6101) - if there is more than 1 matcher, find a more specific prefix than the empty string
        return "";
    }

    @Override
    protected boolean matches(String string, int beginOffset, int endOffset)
    {
        for (StringMatcher matcher : matchers)
        {
            if (matcher.matches(string, beginOffset, endOffset))
            {
                return true;
            }
        }

        return false;
    }
}