/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file 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 "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.jackrabbit.core.cluster;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import org.apache.jackrabbit.core.journal.JournalException;
import org.apache.jackrabbit.core.journal.Record;
import org.apache.jackrabbit.spi.Name;
import org.apache.jackrabbit.spi.QNodeTypeDefinition;
/**
* Cluster record representing a node type registration, re-registration or
* unregistration.
*/
public class NodeTypeRecord extends ClusterRecord {
/**
* Operation type: registration.
*/
public static final int REGISTER = 1;
/**
* Operation type: re-registration.
*/
public static final int REREGISTER = 2;
/**
* Operation type: unregistration.
*/
public static final int UNREGISTER = 3;
/**
* Identifier: NODETYPE.
*/
static final char IDENTIFIER = 'T';
/**
* Bit indicating this is a registration operation.
*/
private static final int NTREG_REGISTER = 0;
/**
* Bit indicating this is a reregistration operation.
*/
private static final int NTREG_REREGISTER = (1 << 30);
/**
* Bit indicating this is an unregistration operation.
*/
private static final int NTREG_UNREGISTER = (1 << 31);
/**
* Mask used in node type registration operations.
*/
private static final int NTREG_MASK = (NTREG_REREGISTER | NTREG_UNREGISTER);
/**
* Operation type.
*/
private int operation;
/**
* Collection of node type definitions or node type names.
*/
private Collection collection;
/**
* Create a new instance of this class. Used when serializing a node type
* registration or unregistration.
*
* @param collection collection of node types definitions or node type names
* @param isRegister <code>true</code> if this is a registration;
* <code>false</code> if this is a unregistration
* @param record journal record
*/
public NodeTypeRecord(Collection collection, boolean isRegister, Record record) {
super(record);
this.collection = collection;
this.operation = isRegister ? REGISTER : UNREGISTER;
}
/**
* Create a new instance of this class. Used when serializing a node type
* re-registration.
*
* @param ntDef node type definition
* @param record journal record
*/
public NodeTypeRecord(QNodeTypeDefinition ntDef, Record record) {
super(record);
this.collection = new ArrayList();
this.collection.add(ntDef);
this.operation = REREGISTER;
}
/**
* Create a new instance of this class. Used when deseralizing a node type
* registration, re-registration or unregistration.
*
* @param record journal record
*/
NodeTypeRecord(Record record) {
super(record);
}
/**
* {@inheritDoc}
*/
@Override
protected void doRead() throws JournalException {
int size = record.readInt();
int opcode = size & NTREG_MASK;
size &= ~NTREG_MASK;
switch (opcode) {
case NTREG_REGISTER:
operation = REGISTER;
collection = new HashSet();
for (int i = 0; i < size; i++) {
collection.add(record.readNodeTypeDef());
}
break;
case NTREG_REREGISTER:
operation = REREGISTER;
collection = new HashSet();
collection.add(record.readNodeTypeDef());
break;
case NTREG_UNREGISTER:
operation = UNREGISTER;
collection = new HashSet();
for (int i = 0; i < size; i++) {
collection.add(record.readQName());
}
break;
default:
String msg = "Unknown opcode: " + opcode;
throw new JournalException(msg);
}
}
/**
* {@inheritDoc}
*/
@Override
protected void doWrite() throws JournalException {
record.writeChar(IDENTIFIER);
int size = collection.size();
size |= getBitMask();
record.writeInt(size);
Iterator iter = collection.iterator();
while (iter.hasNext()) {
if (operation == UNREGISTER) {
record.writeQName((Name) iter.next());
} else {
record.writeNodeTypeDef((QNodeTypeDefinition) iter.next());
}
}
}
/**
* Return the bit mask associated with an operation type.
*
* @return bit mask
*/
private int getBitMask() {
switch (operation) {
case REGISTER:
return NTREG_REGISTER;
case UNREGISTER:
return NTREG_UNREGISTER;
case REREGISTER:
return NTREG_REREGISTER;
}
return 0;
}
/**
* {@inheritDoc}
*/
@Override
public void process(ClusterRecordProcessor processor) {
processor.process(this);
}
/**
* Return the operation type.
* @return <code>REGISTER</code>, <code>REREGISTER</code> or
* <code>UNREGISTER</code>
*/
public int getOperation() {
return operation;
}
/**
* Return the collection of node type definitions or node type names.
*
* @return unmodifiable collection
*/
public Collection getCollection() {
return Collections.unmodifiableCollection(collection);
}
}