code: /**
   * 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.nutch.crawl;
  
  import java.io.*;
  import org.apache.hadoop.io.*;
  
  /* An incoming link to a page. */
  public class Inlink implements Writable {
  
    private String fromUrl;
    private String anchor;
  
    public Inlink() {}
  
    public Inlink(String fromUrl, String anchor) {
      this.fromUrl = fromUrl;
      this.anchor = anchor;
    }
    
    public Inlink(String fromUrl) {
  	  this.fromUrl = fromUrl;
  	  this.anchor = "";
    }
  
    public void readFields(DataInput in) throws IOException {
      fromUrl = Text.readString(in);
      anchor = Text.readString(in);
    }
  
    /** Skips over one Inlink in the input. */
    public static void skip(DataInput in) throws IOException {
      Text.skip(in);                                // skip fromUrl
      Text.skip(in);                                // skip anchor
    }
  
    public void write(DataOutput out) throws IOException {
      Text.writeString(out, fromUrl);
      Text.writeString(out, anchor);
    }
  
    public static Inlink read(DataInput in) throws IOException {
      Inlink inlink = new Inlink();
      inlink.readFields(in);
      return inlink;
    }
  
    public String getFromUrl() { return fromUrl; }
    public String getAnchor() { return anchor; }
  
    public boolean equals(Object o) {
      if (!(o instanceof Inlink))
        return false;
      Inlink other = (Inlink)o;
      return
        this.fromUrl.equals(other.fromUrl) &&
        this.anchor.equals(other.anchor);
    }
  
    public int hashCode() {
      return fromUrl.hashCode() ^ anchor.hashCode();
    }
  
    public String toString() {
      return "fromUrl: " + fromUrl + " anchor: " + anchor;
    }
  
  }
  