/*
* Copyright 2004-2015 the Seasar Foundation and the Others.
*
* 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.seasar.extension.jta.xa;
import java.io.Serializable;
import javax.transaction.xa.Xid;
/**
* {@link Xid}の実装クラスです。
*
* @author higa
*
*/
public class XidImpl implements Xid, Serializable {
static final long serialVersionUID = 1L;
private static final int FORMAT_ID = 0x1108;
private static final byte[] INITIAL_BRANCH_ID = convert64bytes(new byte[0]);
private static final String GLOBAL_ID_BASE = System.currentTimeMillis()
+ "/";
private static int nextId = 0;
private int hashCode;
private byte[] globalId;
private byte[] branchId;
/**
* {@link XidImpl}を作成します。
*/
public XidImpl() {
hashCode = getNextId();
globalId = createGlobalId();
branchId = INITIAL_BRANCH_ID;
}
/**
* {@link XidImpl}を作成します。
*
* @param xid
* トランザクション識別子
* @param bid
* ブランチ識別子
*/
public XidImpl(Xid xid, int bid) {
hashCode = xid.hashCode();
globalId = xid.getGlobalTransactionId();
branchId = convert64bytes(Integer.toString(bid).getBytes());
}
private byte[] createGlobalId() {
return convert64bytes((GLOBAL_ID_BASE + Integer.toString(hashCode))
.getBytes());
}
public byte[] getGlobalTransactionId() {
return (byte[]) globalId.clone();
}
public byte[] getBranchQualifier() {
return (byte[]) branchId.clone();
}
public int getFormatId() {
return FORMAT_ID;
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || !(obj instanceof XidImpl)) {
return false;
}
XidImpl other = (XidImpl) obj;
if (hashCode != other.hashCode) {
return false;
}
if (globalId.length != other.globalId.length
|| branchId.length != other.branchId.length) {
return false;
}
for (int i = 0; i < globalId.length; ++i) {
if (globalId[i] != other.globalId[i]) {
return false;
}
}
for (int i = 0; i < branchId.length; ++i) {
if (branchId[i] != other.branchId[i]) {
return false;
}
}
return true;
}
public int hashCode() {
return hashCode;
}
public String toString() {
return "[FormatId=" + FORMAT_ID + ", GlobalId="
+ new String(globalId).trim() + ", BranchId="
+ new String(branchId).trim() + "]";
}
private static byte[] convert64bytes(byte[] bytes) {
byte[] new64bytes = new byte[64];
System.arraycopy(bytes, 0, new64bytes, 0, bytes.length);
return new64bytes;
}
private static synchronized int getNextId() {
return nextId++;
}
}