/*
* Copyright 2004, 2005, 2006 Odysseus Software GmbH
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.odysseus.calyxo.forms.conf.impl;
import java.util.Map;
import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.el.Expression;
import javax.servlet.jsp.el.ExpressionEvaluator;
import javax.servlet.jsp.el.VariableResolver;
import de.odysseus.calyxo.base.conf.ConfigException;
import de.odysseus.calyxo.base.conf.impl.ConfigImpl;
import de.odysseus.calyxo.base.util.PropertyUtils;
import de.odysseus.calyxo.forms.conf.PropertyConfig;
/**
* Property configuration implementation.
*
* @author Christoph Beck
*/
public class PropertyConfigImpl extends ConfigImpl implements PropertyConfig {
private static class PrintableExpression extends Expression {
Expression expression;
String string;
PrintableExpression(Expression expression, String string) {
super();
this.expression = expression;
this.string = string;
}
public Object evaluate(VariableResolver resolver) throws ELException {
return expression.evaluate(resolver);
}
public String toString() {
return string;
}
}
private String name;
private Object value;
private boolean defined;
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_getElementName()
*/
protected String _getElementName() {
return "property";
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_putAttributes(de.odysseus.calyxo.base.conf.impl.ConfigImpl.Attributes)
*/
protected void _putAttributes(Attributes map) {
super._putAttributes(map);
map.put("name", name);
map.put("value", value);
}
/**
* Answer array <code>{ "value" }</code>.
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_getDynamicAttributes()
*/
protected String[] _getDynamicAttributes() {
return new String[]{ "value" };
}
/**
* Answer <code>true</code> iff the <code>value</code> property has been set.
*/
protected boolean isDefined() {
return defined;
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.PropertyConfig#set(java.lang.Object)
*/
public void set(Object object, ExpressionEvaluator evaluator) throws ConfigException {
if (!defined) {
throw new ConfigException("Cannot set undefined property " + toInlineString());
}
if (object instanceof Map) {
((Map)object).put(name, value);
} else {
try {
if (value instanceof String) {
Class type = PropertyUtils.getPropertyDescriptor(object.getClass(), name).getPropertyType();
if (type == Expression.class) {
String s = "${" + value + "}";
Expression e = evaluator.parseExpression(s, Object.class, this);
PropertyUtils.setProperty(object, name, new PrintableExpression(e, (String) value));
} else {
PropertyUtils.setPropertyFromString(object, name, (String)value);
}
} else {
PropertyUtils.setProperty(object, name, value);
}
} catch (Exception e) {
throw new ConfigException(
"Could not set property " + name + " in " + toInlineString(), e);
}
}
}
/**
* Get name property
*/
public String getName() {
return name;
}
/**
* Set name property
*/
public void setName(String name) {
this.name = name;
}
/**
* Get value property
*/
public Object getValue() {
return value;
}
/**
* Set value property
*/
public void setValue(Object value) {
this.value = value;
defined = true;
}
}