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EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.facelets.tag.jstl.core;
import java.io.Serializable;
import java.util.Map;
import jakarta.el.ELContext;
import jakarta.el.ValueExpression;
/**
* @author Jacob Hookom
* @version $Id$
*/
public final class MappedValueExpression extends ValueExpression {
private final static class Entry implements Map.Entry, Serializable {
private static final long serialVersionUID = 4361498560718735987L;
private final Map src;
private final Object key;
public Entry(Map src, Object key) {
this.src = src;
this.key = key;
}
@Override
public Object getKey() {
return key;
}
@Override
public Object getValue() {
return src.get(key);
}
@Override
public Object setValue(Object value) {
return src.put(key, value);
}
}
/**
*
*/
private static final long serialVersionUID = 1L;
private final Object key;
private final ValueExpression orig;
/**
*
*/
public MappedValueExpression(ValueExpression orig, Map.Entry entry) {
this.orig = orig;
key = entry.getKey();
}
/*
* (non-Javadoc)
*
* @see jakarta.el.ValueExpression#getValue(jakarta.el.ELContext)
*/
@Override
public Object getValue(ELContext context) {
Object base = orig.getValue(context);
if (base != null) {
context.setPropertyResolved(true);
return new Entry((Map) base, key);
}
return null;
}
/*
* (non-Javadoc)
*
* @see jakarta.el.ValueExpression#setValue(jakarta.el.ELContext, java.lang.Object)
*/
@Override
public void setValue(ELContext context, Object value) {
Object base = orig.getValue(context);
if (base != null) {
context.setPropertyResolved(false);
context.getELResolver().setValue(context, base, key, value);
}
}
/*
* (non-Javadoc)
*
* @see jakarta.el.ValueExpression#isReadOnly(jakarta.el.ELContext)
*/
@Override
public boolean isReadOnly(ELContext context) {
Object base = orig.getValue(context);
if (base != null) {
context.setPropertyResolved(false);
return context.getELResolver().isReadOnly(context, base, key);
}
return true;
}
/*
* (non-Javadoc)
*
* @see jakarta.el.ValueExpression#getType(jakarta.el.ELContext)
*/
@Override
public Class getType(ELContext context) {
Object base = orig.getValue(context);
if (base != null) {
context.setPropertyResolved(false);
return context.getELResolver().getType(context, base, key);
}
return null;
}
/*
* (non-Javadoc)
*
* @see jakarta.el.ValueExpression#getExpectedType()
*/
@Override
public Class getExpectedType() {
return Object.class;
}
/*
* (non-Javadoc)
*
* @see jakarta.el.Expression#getExpressionString()
*/
@Override
public String getExpressionString() {
return orig.getExpressionString();
}
/*
* (non-Javadoc)
*
* @see jakarta.el.Expression#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
return orig.equals(obj);
}
/*
* (non-Javadoc)
*
* @see jakarta.el.Expression#hashCode()
*/
@Override
public int hashCode() {
return 0;
}
/*
* (non-Javadoc)eturn new Map.Entry
*
* @see jakarta.el.Expression#isLiteralText()
*/
@Override
public boolean isLiteralText() {
return false;
}
}