de.itsvs.cwtrpc.core.pattern.PatternFactory.java Source code

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Here is the source code for de.itsvs.cwtrpc.core.pattern.PatternFactory.java

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/*
 *  Copyright 2011 IT Services VS GmbH
 *
 *  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 de.itsvs.cwtrpc.core.pattern;

import org.springframework.util.Assert;

/**
 * @author Volker Schmidt
 * @since 0.9
 */
public abstract class PatternFactory {
    private PatternFactory() {
        /* nothing to be done */
    }

    private static final AntPatternMatcher uriAntPatternMatcher = new AntPatternMatcher(
            AntPatternMatcher.URI_PATH_SEPARATOR);

    private static final AntPatternMatcher packageAntPatternMatcher = new AntPatternMatcher(
            AntPatternMatcher.PACKAGE_PATH_SEPARATOR);

    private static final RegexPatternMatcher regexAntPatternMatcher = new RegexPatternMatcher();

    public static Pattern compile(String patternType, MatcherType matcherType, String pattern)
            throws IllegalArgumentException {
        final PatternType convertedPatternType;

        Assert.notNull(patternType, "'patternType' must not be null");
        try {
            convertedPatternType = PatternType.valueOf(patternType.toUpperCase());
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("Pattern type '" + patternType + "' is unsupported");
        }

        return compile(convertedPatternType, matcherType, pattern);
    }

    public static Pattern compile(PatternType patternType, MatcherType matcherType, String pattern)
            throws IllegalArgumentException {
        final PatternMatcher<?> matcher;

        Assert.notNull(patternType, "'patternType' must not be null");
        Assert.notNull(matcherType, "'matcherType' must not be null");

        if (patternType == PatternType.REGEX) {
            matcher = regexAntPatternMatcher;
        } else if (patternType == PatternType.ANT) {
            switch (matcherType) {
            case URI:
                matcher = uriAntPatternMatcher;
                break;
            case PACKAGE:
                matcher = packageAntPatternMatcher;
                break;
            default:
                throw new IllegalStateException("Unhandled matcher type: " + matcherType);
            }
        } else {
            throw new IllegalStateException("Unhandled pattern type: " + patternType);
        }

        return DefaultPattern.createDefaultPattern(matcher, pattern);
    }
}