001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.services.impl;
016    
017    import java.util.Iterator;
018    import java.util.Map;
019    
020    import org.apache.hivemind.util.ToStringBuilder;
021    import org.apache.tapestry.IComponent;
022    import org.apache.tapestry.IMarkupWriter;
023    import org.apache.tapestry.IRender;
024    import org.apache.tapestry.IRequestCycle;
025    import org.apache.tapestry.parse.LocalizationToken;
026    import org.apache.tapestry.parse.TextToken;
027    
028    /**
029     * A class used with invisible localizations. Constructed from a {@link TextToken}.
030     * 
031     * @author Howard Lewis Ship
032     * @since 3.0
033     */
034    
035    public class LocalizedStringRender implements IRender
036    {
037        private IComponent _component;
038    
039        private String _key;
040    
041        private Map _attributes;
042    
043        private String _value;
044    
045        private boolean _raw;
046        
047        private String _tag;
048    
049        public LocalizedStringRender(IComponent component, LocalizationToken token)
050        {
051            _component = component;
052            _key = token.getKey();
053            _raw = token.isRaw();
054            _tag = token.getTag();
055            _attributes = token.getAttributes();
056        }
057    
058        public void render(IMarkupWriter writer, IRequestCycle cycle)
059        {
060            if (cycle.isRewinding())
061                return;
062    
063            if (_attributes != null)
064            {
065                writer.begin(_tag == null ? "span" : _tag);
066                
067                Iterator i = _attributes.entrySet().iterator();
068    
069                while (i.hasNext())
070                {
071                    Map.Entry entry = (Map.Entry) i.next();
072                    String attributeName = (String) entry.getKey();
073                    String attributeValue = (String) entry.getValue();
074    
075                    writer.attribute(attributeName, attributeValue);
076                }
077            }
078    
079            if (_value == null)
080                _value = _component.getMessages().getMessage(_key);
081    
082            writer.print(_value, _raw);
083            
084            if (_attributes != null)
085                writer.end();
086        }
087    
088        public String toString()
089        {
090            ToStringBuilder builder = new ToStringBuilder(this);
091    
092            builder.append("component", _component);
093            builder.append("key", _key);
094            builder.append("raw", _raw);
095            builder.append("attributes", _attributes);
096    
097            return builder.toString();
098        }
099    
100    }