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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
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* KIND, either express or implied. See the License for the
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package org.apache.cayenne.reflect.generic;
import org.apache.cayenne.DataObject;
import org.apache.cayenne.reflect.Accessor;
import org.apache.cayenne.reflect.PropertyException;
/**
* A PropertyAccessor that uses DataObject API to read/write values.
*
* @since 3.0
* @author Andrus Adamchik
*/
class DataObjectAccessor implements Accessor {
protected String propertyName;
DataObjectAccessor(String propertyName) {
if (propertyName == null) {
throw new IllegalArgumentException("Null propertyName");
}
this.propertyName = propertyName;
}
public String getName() {
return propertyName;
}
/**
* Reads the value without disturbing DataObject state. I.e. no Fault resolving occurs
* here.
*/
public Object getValue(Object object) throws PropertyException {
try {
DataObject dataObject = (DataObject) object;
return dataObject.readPropertyDirectly(propertyName);
}
catch (ClassCastException e) {
throw new PropertyException("Object is not a DataObject: '"
+ object.getClass().getName()
+ "'", this, object, e);
}
catch (Throwable th) {
throw new PropertyException("Error reading DataObject property: "
+ propertyName, this, object, th);
}
// TODO - see TODO in 'setValue'
}
/**
* @since 3.0
*/
public void setValue(Object object, Object newValue) throws PropertyException {
try {
((DataObject) object).writePropertyDirectly(propertyName, newValue);
}
catch (ClassCastException e) {
throw new PropertyException("Object is not a DataObject: '"
+ object.getClass().getName()
+ "'", this, object, e);
}
catch (Throwable th) {
throw new PropertyException("Error reading DataObject property: "
+ propertyName, this, object, th);
}
// TODO, Andrus, 1/22/2006 - check for the right type? DataObject never did it
// itself... Doing a check (and a conversion) may be an easy way to fix CAY-399
}
}