| /** |
| * 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.geronimo.transaction.manager; |
| |
| import java.io.Serializable; |
| import java.util.Arrays; |
| import javax.transaction.xa.Xid; |
| |
| /** |
| * Unique id for a transaction. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class XidImpl implements Xid, Serializable { |
| private static int FORMAT_ID = 0x4765526f; // Gero |
| private final int formatId; |
| private final byte[] globalId; |
| private final byte[] branchId; |
| private int hash; //apparently never used by our code, so don't compute it. |
| |
| /** |
| * Constructor taking a global id (for the main transaction) |
| * @param globalId the global transaction id |
| */ |
| public XidImpl(byte[] globalId) { |
| this.formatId = FORMAT_ID; |
| this.globalId = globalId; |
| //this.hash = hash(0, globalId); |
| branchId = new byte[Xid.MAXBQUALSIZE]; |
| } |
| |
| /** |
| * Constructor for a branch id |
| * @param global the xid of the global transaction this branch belongs to |
| * @param branch the branch id |
| */ |
| public XidImpl(Xid global, byte[] branch) { |
| this.formatId = FORMAT_ID; |
| //int hash; |
| if (global instanceof XidImpl) { |
| globalId = ((XidImpl) global).globalId; |
| //hash = ((XidImpl) global).hash; |
| } else { |
| globalId = global.getGlobalTransactionId(); |
| //hash = hash(0, globalId); |
| } |
| branchId = branch; |
| //this.hash = hash(hash, branchId); |
| } |
| |
| public XidImpl(int formatId, byte[] globalId, byte[] branchId) { |
| this.formatId = formatId; |
| this.globalId = globalId; |
| this.branchId = branchId; |
| } |
| |
| private int hash(int hash, byte[] id) { |
| for (int i = 0; i < id.length; i++) { |
| hash = (hash * 37) + id[i]; |
| } |
| return hash; |
| } |
| |
| public int getFormatId() { |
| return formatId; |
| } |
| |
| public byte[] getGlobalTransactionId() { |
| return (byte[]) globalId.clone(); |
| } |
| |
| public byte[] getBranchQualifier() { |
| return (byte[]) branchId.clone(); |
| } |
| |
| public boolean equals(Object obj) { |
| if (obj instanceof XidImpl == false) { |
| return false; |
| } |
| XidImpl other = (XidImpl) obj; |
| return formatId == other.formatId |
| && Arrays.equals(globalId, other.globalId) |
| && Arrays.equals(branchId, other.branchId); |
| } |
| |
| public int hashCode() { |
| if (hash == 0) { |
| hash = hash(hash(0, globalId), branchId); |
| } |
| return hash; |
| } |
| |
| public String toString() { |
| StringBuffer s = new StringBuffer(); |
| s.append("[globalId="); |
| for (int i = 0; i < globalId.length; i++) { |
| s.append(Integer.toHexString(globalId[i])); |
| } |
| s.append(",branchId="); |
| for (int i = 0; i < branchId.length; i++) { |
| s.append(Integer.toHexString(branchId[i])); |
| } |
| s.append("]"); |
| return s.toString(); |
| } |
| } |