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• CombiningMatchingPatterns.java

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com.sun.jersey.server.impl.uri.rules.CombiningMatchingPatterns Maven / Gradle / Ivy

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
package com.sun.jersey.server.impl.uri.rules;

import com.sun.jersey.spi.uri.rules.UriMatchResultContext;
import com.sun.jersey.spi.uri.rules.UriRules;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;

/**
 * Rules combining one or more other rules and matching in sequence.
 * 
 * @author [email protected]
 */
public class CombiningMatchingPatterns implements UriRules {

    private final List> rs;
        
    public CombiningMatchingPatterns(List> rs) {
        this.rs = rs;
    }

    public Iterator match(CharSequence path, UriMatchResultContext resultContext) {
        return new XInterator(path, resultContext);
    }

    private final class XInterator implements Iterator {

        private final CharSequence path;
        private final UriMatchResultContext resultContext;
        private Iterator ruleIterator;
        private Iterator> rulesIterator;
        private R r;

        XInterator(CharSequence path, UriMatchResultContext resultContext) {
            this.path = path;
            this.resultContext = resultContext;
            this.rulesIterator = rs.iterator();
            this.ruleIterator = rulesIterator.next().match(path, resultContext);
        }
        
        public boolean hasNext() {
            if (r != null) return true;

            if (ruleIterator.hasNext()) {
                r = ruleIterator.next();
                return true;
            }
            
            while (rulesIterator.hasNext()) {
                ruleIterator = rulesIterator.next().match(path, resultContext);                
                if (ruleIterator.hasNext()) {
                    r = ruleIterator.next();
                    return true;                
                }
            }
            
            return false;
        }

        public R next() {
            if (!hasNext()) throw new NoSuchElementException();
            
            final R _r = r;
            r = null;
            return _r;
        }

        public void remove() {
            throw new UnsupportedOperationException();
        }
    }
}