001    // Copyright 2010 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    package org.apache.tapestry5.internal.services;
015    
016    import java.util.List;
017    
018    import org.apache.tapestry5.OptionModel;
019    import org.apache.tapestry5.SelectModel;
020    import org.apache.tapestry5.ValueEncoder;
021    import org.apache.tapestry5.internal.OptionModelImpl;
022    import org.apache.tapestry5.internal.SelectModelImpl;
023    import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
024    import org.apache.tapestry5.ioc.services.ClassPropertyAdapter;
025    import org.apache.tapestry5.ioc.services.PropertyAccess;
026    import org.apache.tapestry5.ioc.services.PropertyAdapter;
027    import org.apache.tapestry5.services.SelectModelFactory;
028    import org.apache.tapestry5.services.ValueEncoderSource;
029    
030    public class SelectModelFactoryImpl implements SelectModelFactory
031    {
032        private final PropertyAccess propertyAccess;
033        private final ValueEncoderSource valueEncoderSource;
034    
035        public SelectModelFactoryImpl(final PropertyAccess propertyAccess,
036                final ValueEncoderSource valueEncoderSource)
037        {
038            super();
039            this.propertyAccess = propertyAccess;
040            this.valueEncoderSource = valueEncoderSource;
041        }
042    
043        @SuppressWarnings("unchecked")
044        public SelectModel create(final List<?> objects, final String labelProperty)
045        {
046            final List<OptionModel> options = CollectionFactory.newList();
047    
048            for (final Object object : objects)
049            {
050                final ClassPropertyAdapter classPropertyAdapter = this.propertyAccess
051                        .getAdapter(object);
052    
053                final PropertyAdapter propertyAdapter = classPropertyAdapter.getPropertyAdapter(labelProperty);
054    
055                final ValueEncoder encoder = this.valueEncoderSource.getValueEncoder(propertyAdapter.getType());
056    
057                final Object label = propertyAdapter.get(object);
058    
059                options.add(new OptionModelImpl(encoder.toClient(label), object));
060    
061            }
062    
063            return new SelectModelImpl(null, options);
064        }
065    }