Package org.apache.cocoon.jnet

Source Code of org.apache.cocoon.jnet.URLHandlerFactoryCollector

/*
* 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.cocoon.jnet;

import java.net.URLStreamHandlerFactory;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;

import org.aspectj.lang.ProceedingJoinPoint;

public class URLHandlerFactoryCollector {

    private Map<String, URLStreamHandlerFactory> urlHandlerFactories = Collections.emptyMap();

    private boolean urlStreamHandlerInstalled;

    public Object installURLHandlers(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        try {
            this.pushUrlHandlerFactories();
            return proceedingJoinPoint.proceed();
        } finally {
            this.popUrlHandlerFactories();
        }
    }

    public void pushUrlHandlerFactories() throws Exception {
        if (!this.urlStreamHandlerInstalled) {
            URLStreamHandlerFactoryInstaller.setURLStreamHandlerFactory(new DynamicURLStreamHandlerFactory());
            this.urlStreamHandlerInstalled = true;
        }

        for (Iterator<URLStreamHandlerFactory> i = this.urlHandlerFactories.values().iterator(); i.hasNext();) {
            URLStreamHandlerFactory streamHandlerFactory = i.next();
            DynamicURLStreamHandlerFactory.push(streamHandlerFactory);
        }
    }

    public void popUrlHandlerFactories() {
        for (Iterator<URLStreamHandlerFactory> i = this.urlHandlerFactories.values().iterator(); i.hasNext(); i
                .next()) {
            DynamicURLStreamHandlerFactory.pop();
        }
    }

    public void setUrlHandlerFactories(Map<String, URLStreamHandlerFactory> urlHandlerFactories) {
        this.urlHandlerFactories = urlHandlerFactories;
    }
}
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