// Copyright 2004, 2005 The Apache Software Foundation
//
// 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 org.apache.hivemind.schema.rules;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hivemind.Element;
import org.apache.hivemind.ErrorHandler;
import org.apache.hivemind.Location;
import org.apache.hivemind.schema.SchemaProcessor;
import org.apache.hivemind.schema.Translator;
import org.apache.hivemind.util.PropertyUtils;
/**
* Reads an attribute of an element and uses it to set a property of the top object on the stack.
* Created from the <code><read-attribute></code> element.
*
* @author Howard Lewis Ship
*/
public class ReadAttributeRule extends BaseRule
{
private static final Log LOG = LogFactory.getLog(ReadAttributeRule.class);
private String _attributeName;
private String _propertyName;
private boolean _skipIfNull = true;
private String _translator;
public ReadAttributeRule()
{
}
public ReadAttributeRule(String attributeName, String propertyName, String translator,
Location location)
{
setLocation(location);
_attributeName = attributeName;
_propertyName = propertyName;
_translator = translator;
}
public void begin(SchemaProcessor processor, Element element)
{
String value = getAttributeValue(processor, element);
if (value == null && _skipIfNull)
return;
value = RuleUtils.processText(processor, element, value);
Object target = processor.peek();
try
{
Translator t = _translator == null ? processor.getAttributeTranslator(_attributeName)
: processor.getTranslator(_translator);
Class propertyType = PropertyUtils.getPropertyType(target, _propertyName);
Object finalValue = t.translate(
processor.getContributingModule(),
propertyType,
value,
element.getLocation());
PropertyUtils.write(target, _propertyName, finalValue);
}
catch (Exception ex)
{
ErrorHandler eh = processor.getContributingModule().getErrorHandler();
eh.error(LOG, RulesMessages
.readAttributeFailure(_attributeName, element, processor, ex), element
.getLocation(), ex);
}
}
private String getAttributeValue(SchemaProcessor processor, Element element)
{
final String rawValue = element.getAttributeValue(_attributeName);
return rawValue == null ? processor.getAttributeDefault(_attributeName) : rawValue;
}
public String getAttributeName()
{
return _attributeName;
}
public String getPropertyName()
{
return _propertyName;
}
public boolean getSkipIfNull()
{
return _skipIfNull;
}
/**
* @since 1.1
*/
public String getTranslator()
{
return _translator;
}
public void setAttributeName(String string)
{
_attributeName = string;
}
public void setPropertyName(String string)
{
_propertyName = string;
}
public void setSkipIfNull(boolean b)
{
_skipIfNull = b;
}
public void setTranslator(String string)
{
_translator = string;
}
}