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}