/**
* Copyright 2005 JBoss Inc
*
* 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.drools.process.core.datatype.impl;
import org.drools.process.core.datatype.DataType;
import org.drools.process.core.datatype.DataTypeFactory;
/**
* A data type factory that always returns the same instance of a given class.
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
*/
public class InstanceDataTypeFactory implements DataTypeFactory {
private static final long serialVersionUID = 510l;
private Class<?> dataTypeClass;
private DataType instance;
public InstanceDataTypeFactory(final Class<?> dataTypeClass) {
this.dataTypeClass = dataTypeClass;
}
public DataType createDataType() {
if (this.instance == null) {
try {
this.instance = (DataType) this.dataTypeClass.newInstance();
} catch (final IllegalAccessException e) {
throw new RuntimeException(
"Could not create data type for class "
+ this.dataTypeClass, e);
} catch (final InstantiationException e) {
throw new RuntimeException(
"Could not create data type for class "
+ this.dataTypeClass, e);
}
}
return this.instance;
}
}