001/* 002 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Anahide Tchertchian 018 */ 019package org.nuxeo.ecm.platform.ui.web.binding; 020 021import java.io.Serializable; 022import java.util.Collections; 023import java.util.HashMap; 024import java.util.Map; 025 026import javax.el.ELContext; 027import javax.el.PropertyNotFoundException; 028import javax.el.ValueExpression; 029 030/** 031 * Value expression representing a map of value expressions, to allow resolution, at runtime, of all of the map values. 032 * <p> 033 * Useful to pass resolved widget properties to third party code (typically javascript code) 034 * 035 * @since 5.8 036 */ 037public class MapValueExpression extends ValueExpression { 038 039 private static final long serialVersionUID = 1L; 040 041 protected final Map<String, ValueExpression> map; 042 043 public MapValueExpression(Map<String, ValueExpression> map) { 044 super(); 045 this.map = map == null ? Collections.<String, ValueExpression> emptyMap() : map; 046 } 047 048 @Override 049 public Class<?> getExpectedType() { 050 return Map.class; 051 } 052 053 @Override 054 public Class<?> getType(ELContext arg0) throws PropertyNotFoundException { 055 return Map.class; 056 } 057 058 @Override 059 public Object getValue(ELContext elContext) throws PropertyNotFoundException { 060 Map<String, Serializable> res = new HashMap<String, Serializable>(); 061 if (map != null) { 062 for (Map.Entry<String, ValueExpression> entry : map.entrySet()) { 063 ValueExpression ve = entry.getValue(); 064 if (ve != null) { 065 res.put(entry.getKey(), (Serializable) ve.getValue(elContext)); 066 } else { 067 res.put(entry.getKey(), null); 068 } 069 } 070 } 071 return res; 072 } 073 074 @Override 075 public boolean isReadOnly(ELContext arg0) throws PropertyNotFoundException { 076 return true; 077 } 078 079 @Override 080 public void setValue(ELContext arg0, Object arg1) throws PropertyNotFoundException { 081 // do nothing 082 } 083 084 @Override 085 public String getExpressionString() { 086 return null; 087 } 088 089 @Override 090 public boolean isLiteralText() { 091 return false; 092 } 093 094 @Override 095 public boolean equals(Object obj) { 096 if (this == obj) { 097 return true; 098 } 099 if (!(obj instanceof MapValueExpression)) { 100 return false; 101 } 102 MapValueExpression other = (MapValueExpression) obj; 103 return map.equals(other.map); 104 } 105 106 @Override 107 public int hashCode() { 108 return map.hashCode(); 109 } 110 111}