/*******************************************************************************
* Copyright (c) 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* James Sutherland - initial API and implementation
* 03/24/2011-2.3 Guy Pelletier
* - 337323: Multi-tenant with shared schema support (part 1)
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.partitioning;
import java.lang.reflect.Constructor;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.persistence.internal.jpa.metadata.accessors.MetadataAccessor;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotation;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.internal.security.PrivilegedGetConstructorFor;
import org.eclipse.persistence.internal.security.PrivilegedInvokeConstructor;
import org.eclipse.persistence.descriptors.partitioning.PartitioningPolicy;
import org.eclipse.persistence.descriptors.partitioning.RangePartition;
import org.eclipse.persistence.descriptors.partitioning.RangePartitioningPolicy;
/**
* INTERNAL:
* Define JPA meta-data for partitioning policy.
*
* Key notes:
* - any metadata mapped from XML to this class must be compared in the
* equals method.
* - when loading from annotations, the constructor accepts the metadata
* accessor this metadata was loaded from. Used it to look up any
* 'companion' annotation needed for processing.
* - methods should be preserved in alphabetical order.
*
* @author James Sutherland
* @since EclipseLink 2.2
*/
public class RangePartitioningMetadata extends FieldPartitioningMetadata {
// Note: Any metadata mapped from XML to this class must be compared in the equals method.
protected List<RangePartitionMetadata> partitions;
/**
* INTERNAL:
* Used for XML loading.
*/
public RangePartitioningMetadata() {
super("<range-partitioning>");
}
/**
* INTERNAL:
* Used for annotation loading.
*/
public RangePartitioningMetadata(MetadataAnnotation annotation, MetadataAccessor accessor) {
super(annotation, accessor);
this.partitions = new ArrayList<RangePartitionMetadata>();
for (Object partitionAnnotation : (Object[])annotation.getAttributeArray("partitions")) {
this.partitions.add(new RangePartitionMetadata((MetadataAnnotation)partitionAnnotation, accessor));
}
}
@Override
public boolean equals(Object objectToCompare) {
if (super.equals(objectToCompare) && (objectToCompare instanceof RangePartitioningMetadata)) {
RangePartitioningMetadata policy = (RangePartitioningMetadata) objectToCompare;
return valuesMatch(this.partitions, policy.getPartitions());
}
return false;
}
/**
* TODO: this needs to be done at runtime.
*/
private Object initObject(Class type, String value) {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
try {
Constructor constructor = (Constructor) AccessController.doPrivileged(new PrivilegedGetConstructorFor(type, new Class[] {String.class}, false));
return AccessController.doPrivileged(new PrivilegedInvokeConstructor(constructor, new Object[] {value}));
} catch (PrivilegedActionException exception) {
//throwInitObjectException(exception, type, value, isData);
}
} else {
try {
Constructor constructor = PrivilegedAccessHelper.getConstructorFor(type, new Class[] {String.class}, false);
return PrivilegedAccessHelper.invokeConstructor(constructor, new Object[] {value});
} catch (Exception exception) {
//throwInitObjectException(exception, type, value, isData);
}
}
return value;
}
@Override
public PartitioningPolicy buildPolicy() {
RangePartitioningPolicy policy = new RangePartitioningPolicy();
super.buildPolicy(policy);
Class type = String.class;
if (this.partitionValueType != null) {
type = getJavaClass(getMetadataClass(this.partitionValueType));
}
for (RangePartitionMetadata partition : getPartitions()) {
Comparable startValue = null;
if (partition.getStartValue() != null) {
startValue = (Comparable)initObject(type, partition.getStartValue());
}
Comparable endValue = null;
if (partition.getEndValue() != null) {
endValue = (Comparable)initObject(type, partition.getEndValue());
}
policy.addPartition(new RangePartition(partition.getConnectionPool(), startValue, endValue));
}
return policy;
}
public List<RangePartitionMetadata> getPartitions() {
return partitions;
}
public void setPartitions(List<RangePartitionMetadata> partitions) {
this.partitions = partitions;
}
}