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
015package org.apache.tapestry.services.impl;
016
017import java.util.HashMap;
018import java.util.Iterator;
019import java.util.List;
020import java.util.Map;
021
022import org.apache.hivemind.Location;
023import org.apache.tapestry.IBinding;
024import org.apache.tapestry.IComponent;
025import org.apache.tapestry.binding.BindingFactory;
026import org.apache.tapestry.binding.BindingSource;
027
028/**
029 * Implementation of the <code>tapestry.bindings.BindingSource</code> service.
030 * 
031 * @author Howard Lewis Ship
032 * @since 4.0
033 */
034public class BindingSourceImpl implements BindingSource
035{
036    private List _contributions;
037
038    /**
039     * Keyed on prefix, value is {@link BindingFactory}.
040     */
041    private Map _factoryMap = new HashMap();
042
043    public void initializeService()
044    {
045        Iterator i = _contributions.iterator();
046
047        while (i.hasNext())
048        {
049            BindingPrefixContribution c = (BindingPrefixContribution) i.next();
050
051            _factoryMap.put(c.getPrefix(), c.getFactory());
052        }
053    }
054
055    public IBinding createBinding(IComponent component, String bindingDescription,
056            String reference, String defaultPrefix, Location location)
057    {
058        String prefix = defaultPrefix;
059        String path = reference;
060
061        int colonx = reference.indexOf(':');
062
063        if (colonx > 1)
064        {
065            String pathPrefix = reference.substring(0, colonx);
066
067            if (_factoryMap.containsKey(pathPrefix))
068            {
069                prefix = pathPrefix;
070
071                path = reference.substring(colonx + 1);
072            }
073        }
074
075        BindingFactory factory = (BindingFactory) _factoryMap.get(prefix);
076
077        return factory.createBinding(component, bindingDescription, path, location);
078    }
079
080    public void setContributions(List contributions)
081    {
082        _contributions = contributions;
083    }
084}