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.
014package org.apache.tapestry5.internal.services;
015
016import java.util.List;
017
018import org.apache.tapestry5.OptionModel;
019import org.apache.tapestry5.SelectModel;
020import org.apache.tapestry5.ValueEncoder;
021import org.apache.tapestry5.internal.OptionModelImpl;
022import org.apache.tapestry5.internal.SelectModelImpl;
023import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
024import org.apache.tapestry5.ioc.services.ClassPropertyAdapter;
025import org.apache.tapestry5.ioc.services.PropertyAccess;
026import org.apache.tapestry5.ioc.services.PropertyAdapter;
027import org.apache.tapestry5.services.SelectModelFactory;
028import org.apache.tapestry5.services.ValueEncoderSource;
029
030public 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}