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

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.modules.input;
018:
019:        import org.apache.avalon.framework.configuration.Configurable;
020:        import org.apache.avalon.framework.configuration.Configuration;
021:        import org.apache.avalon.framework.configuration.ConfigurationException;
022:        import org.apache.avalon.framework.logger.AbstractLogEnabled;
023:        import org.apache.avalon.framework.thread.ThreadSafe;
024:
025:        import java.util.HashMap;
026:        import java.util.Iterator;
027:        import java.util.Map;
028:        import java.util.SortedSet;
029:        import java.util.TreeSet;
030:
031:        /**
032:         * Set a number of constants. To override the values with input from
033:         * another module, combine this one with the ChainMetaModule and an
034:         * arbitrary number of other modules.
035:         * 
036:         * <pre>
037:         * &lt;values&gt;
038:         *  &lt;skin&gt;myskin&lt;/skin&gt;
039:         *  &lt;base&gt;baseurl&lt;/base&gt;
040:         *  ...
041:         * &lt;/values&gt;
042:         * </pre>
043:         * 
044:         * @author <a href="mailto:haul@apache.org">Christian Haul</a>
045:         * @version $Id: DefaultsModule.java 433543 2006-08-22 06:22:54Z crossley $
046:         */
047:        public class DefaultsModule extends AbstractLogEnabled implements 
048:                InputModule, Configurable, ThreadSafe {
049:
050:            private Map constants = null;
051:
052:            public void configure(Configuration config)
053:                    throws ConfigurationException {
054:
055:                this .constants = new HashMap();
056:                Configuration[] consts = config.getChild("values")
057:                        .getChildren();
058:                for (int i = 0; i < consts.length; i++) {
059:                    this .constants.put(consts[i].getName(), consts[i]
060:                            .getValue(""));
061:                }
062:            }
063:
064:            public Object[] getAttributeValues(String name,
065:                    Configuration modeConf, Map objectModel)
066:                    throws ConfigurationException {
067:
068:                String parameter = name;
069:                Configuration mConf = null;
070:                if (modeConf != null) {
071:                    mConf = modeConf.getChild("values");
072:                }
073:
074:                Object[] values = new Object[1];
075:                values[0] = (mConf != null ? mConf.getChild(parameter)
076:                        .getValue((String) this .constants.get(parameter))
077:                        : this .constants.get(parameter));
078:                return values;
079:            }
080:
081:            public Iterator getAttributeNames(Configuration modeConf,
082:                    Map objectModel) throws ConfigurationException {
083:
084:                SortedSet matchset = new TreeSet(this .constants.keySet());
085:                if (modeConf != null) {
086:                    Configuration[] consts = modeConf.getChild("values")
087:                            .getChildren();
088:                    for (int i = 0; i < consts.length; i++)
089:                        matchset.add(consts[i].getName());
090:                }
091:                return matchset.iterator();
092:            }
093:
094:            public Object getAttribute(String name, Configuration modeConf,
095:                    Map objectModel) throws ConfigurationException {
096:
097:                Object[] values = this .getAttributeValues(name, modeConf,
098:                        objectModel);
099:                return values[0];
100:            }
101:
102:        }