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 * 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
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.

package org.apache.vinci.transport.vns.service;

import java.util.Hashtable;

import org.apache.vinci.transport.Frame;
import org.apache.vinci.transport.VinciFrame;

00027 public class ServiceAlias implements ServiceInterface {

  protected String name, target;

  public ServiceAlias(String name, String target) {
    this.name = name;
    this.target = target;

  public Frame toFrame() {
    Frame F = new VinciFrame(); // hack around the fact that Frame is an abstract class

    F.fadd("NAME", name);
    F.fadd("TARGET", target);

    return F;

  public String toXML() {
    return toXML(0);

  public String toXML(int offset) {
    StringBuffer indent = new StringBuffer(offset);
    while (offset > 0) {
      indent.append(' ');
      offset --;
    StringBuffer result = new StringBuffer(50);

    result = result.append(indent).append("<SERVICE>\n");
    result = result.append(indent).append("   <NAME>").append(name).append("</NAME>\n");
    result = result.append(indent).append("   <TARGET>").append(target).append("</TARGET>\n");
    result = result.append(indent).append("</SERVICE>\n");

    return result.toString();

  public static boolean isAlias(Object o) {
    return (o instanceof ServiceAlias);

  public Object toService(Hashtable H) {
    if (H.get("TARGET") != null)
      return new ServiceAlias((String) H.get("NAME"), (String) H.get("TARGET"));
      return new Service(H);

  public Object getAttr(String name) {
    name = name.toLowerCase().trim();
    if (name.equals("name"))
      return name;
    if (name.equals("target"))
      return target;
    return null;

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