// 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.service.impl;
import java.util.HashMap;
import java.util.Map;
import org.apache.hivemind.Location;
import org.apache.hivemind.ServiceImplementationFactoryParameters;
import org.apache.hivemind.TranslatorManager;
import org.apache.hivemind.internal.Module;
import org.apache.hivemind.schema.Translator;
import org.apache.hivemind.util.ConstructorUtils;
/**
* Implementation of {@link org.apache.hivemind.service.impl.BuilderFacet} that stores a value. This
* corresponds to the <set> type elements and all constructor parameter elements. The value is
* not resolved until needed using a specified {@link Translator}.
*
* @author Howard Lewis Ship
*/
public class BuilderPropertyFacet extends BuilderFacet
{
private String _translatorName;
private String _literalValue;
/**
* Cache for translated values to prevent calling
* {@link Translator#translate(Module, Class, String, Location)} twice.
*/
private Map _valuesCache = new HashMap();
public Object getFacetValue(ServiceImplementationFactoryParameters factoryParameters,
Class targetType)
{
Object result = _valuesCache.get(targetType);
if (result == null)
{
TranslatorManager translatorManager = (TranslatorManager) factoryParameters.getInvokingModule().getService(TranslatorManager.class);
Translator translator = translatorManager.getTranslator(_translatorName);
result = translator.translate(
factoryParameters.getInvokingModule(),
targetType,
_literalValue,
getLocation());
_valuesCache.put(targetType, result);
}
return result;
}
public boolean isAssignableToType(ServiceImplementationFactoryParameters factoryParameters,
Class targetType)
{
// TODO should Translator declare an analoguous isAssignableToType method?
Object facetValue = getFacetValue(factoryParameters, targetType);
if (facetValue == null)
return !targetType.isPrimitive();
return ConstructorUtils.isCompatible(targetType, facetValue.getClass());
}
/** @since 1.1 */
public void setTranslator(String translatorName)
{
_translatorName = translatorName;
}
public void setValue(String value)
{
_literalValue = value;
}
}