Source Code Cross Referenced for URLFactoryWrapper.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » components » source » impl » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Content Management System » apache lenya 2.0 » org.apache.cocoon.components.source.impl 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         * 
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         * 
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.cocoon.components.source.impl;
018:
019:        import org.apache.avalon.framework.activity.Disposable;
020:        import org.apache.avalon.framework.component.ComponentException;
021:        import org.apache.avalon.framework.component.ComponentManager;
022:        import org.apache.avalon.framework.component.Composable;
023:        import org.apache.avalon.framework.configuration.Configurable;
024:        import org.apache.avalon.framework.configuration.Configuration;
025:        import org.apache.avalon.framework.configuration.ConfigurationException;
026:        import org.apache.avalon.framework.context.Context;
027:        import org.apache.avalon.framework.context.ContextException;
028:        import org.apache.avalon.framework.context.Contextualizable;
029:        import org.apache.avalon.framework.logger.AbstractLogEnabled;
030:        import org.apache.avalon.framework.logger.LogEnabled;
031:        import org.apache.avalon.framework.thread.ThreadSafe;
032:        import org.apache.cocoon.components.url.URLFactory;
033:        import org.apache.cocoon.util.ClassUtils;
034:        import org.apache.excalibur.source.Source;
035:        import org.apache.excalibur.source.SourceFactory;
036:        import org.apache.excalibur.source.impl.URLSource;
037:
038:        import java.io.IOException;
039:        import java.net.MalformedURLException;
040:        import java.net.URL;
041:        import java.util.Map;
042:
043:        /**
044:         * This class wraps a Cocoon URLFactory and makes it
045:         * usable within the Avalon Excalibur source resolving architecure.
046:         * The main purpose is to avoid recoding existing factories.
047:         *
048:         * @author <a href="mailto:cziegeler@apache.org">Carsten Ziegeler</a>
049:         * @version CVS $Id: URLFactoryWrapper.java 433543 2006-08-22 06:22:54Z crossley $
050:         */
051:
052:        public final class URLFactoryWrapper extends AbstractLogEnabled
053:                implements  SourceFactory, ThreadSafe, Configurable, Disposable,
054:                Composable, Contextualizable {
055:            /** The <code>ComponentManager</code> */
056:            private ComponentManager manager;
057:
058:            /** The special Source factories */
059:            private URLFactory urlFactory;
060:
061:            /** The context */
062:            private Context context;
063:
064:            /**
065:             * Configure the SourceFactories
066:             */
067:            public void configure(final Configuration conf)
068:                    throws ConfigurationException {
069:
070:                try {
071:                    final Configuration factoryConf = conf
072:                            .getChild("url-factory");
073:                    final String className = factoryConf.getAttribute("class");
074:                    if (this .getLogger().isDebugEnabled()) {
075:                        this .getLogger().debug(
076:                                "Getting the URLFactory " + className);
077:                    }
078:                    this .urlFactory = (URLFactory) ClassUtils
079:                            .newInstance(className);
080:                    this .init(this .urlFactory, factoryConf);
081:                } catch (ConfigurationException e) {
082:                    throw e;
083:                } catch (Exception e) {
084:                    throw new ConfigurationException(
085:                            "Could not get parameters because: "
086:                                    + e.getMessage(), e);
087:                }
088:            }
089:
090:            /**
091:             * Get the context
092:             */
093:            public void contextualize(Context context) throws ContextException {
094:                this .context = context;
095:            }
096:
097:            /**
098:             * Set the current <code>ComponentManager</code> instance used by this
099:             * <code>Composable</code>.
100:             */
101:            public void compose(ComponentManager manager)
102:                    throws ComponentException {
103:                this .manager = manager;
104:            }
105:
106:            /**
107:             * Dispose
108:             */
109:            public void dispose() {
110:                if (this .urlFactory != null) {
111:                    this .deinit(this .urlFactory);
112:                }
113:                this .urlFactory = null;
114:            }
115:
116:            /**
117:             * Get a <code>Source</code> object.
118:             * @param parameters This is optional.
119:             */
120:            public Source getSource(String location, Map parameters)
121:                    throws MalformedURLException, IOException {
122:                if (this .getLogger().isDebugEnabled()) {
123:                    this .getLogger().debug(
124:                            "Creating source object for " + location);
125:                }
126:
127:                final int protocolPos = location.indexOf("://");
128:                final URL url = this .urlFactory.getURL(location
129:                        .substring(protocolPos + 3));
130:                final URLSource source = new org.apache.excalibur.source.impl.URLSource();
131:                source.init(url, parameters);
132:                return source;
133:            }
134:
135:            /**
136:             * Init a url factory
137:             */
138:            private void init(URLFactory factory, Configuration config)
139:                    throws ContextException, ComponentException,
140:                    ConfigurationException {
141:                if (factory instanceof  LogEnabled) {
142:                    ((LogEnabled) factory).enableLogging(getLogger());
143:                }
144:                if (factory instanceof  Contextualizable) {
145:                    ((Contextualizable) factory).contextualize(this .context);
146:                }
147:                if (factory instanceof  Composable) {
148:                    ((Composable) factory).compose(this .manager);
149:                }
150:                if (config != null && factory instanceof  Configurable) {
151:                    ((Configurable) factory).configure(config);
152:                }
153:            }
154:
155:            /**
156:             * Deinit a url factory
157:             */
158:            private void deinit(URLFactory factory) {
159:                if (factory instanceof  Disposable) {
160:                    ((Disposable) factory).dispose();
161:                }
162:            }
163:
164:            /**
165:             * Release a {@link Source} object.
166:             */
167:            public void release(Source source) {
168:                if (null != source) {
169:                    if (this .getLogger().isDebugEnabled()) {
170:                        this .getLogger().debug(
171:                                "Releasing source " + source.getURI());
172:                    }
173:                    // do simply nothing
174:                }
175:            }
176:
177:        }
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