001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.record.meta;
020    
021    import java.io.IOException;
022    
023    import org.apache.hadoop.classification.InterfaceAudience;
024    import org.apache.hadoop.classification.InterfaceStability;
025    import org.apache.hadoop.record.RecordOutput;
026    
027    /** 
028     * Represents a type information for a field, which is made up of its 
029     * ID (name) and its type (a TypeID object).
030     * 
031     * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
032     */
033    @Deprecated
034    @InterfaceAudience.Public
035    @InterfaceStability.Stable
036    public class FieldTypeInfo
037    {
038    
039      private String fieldID;
040      private TypeID typeID;
041    
042      /**
043       * Construct a FiledTypeInfo with the given field name and the type
044       */
045      FieldTypeInfo(String fieldID, TypeID typeID) {
046        this.fieldID = fieldID;
047        this.typeID = typeID;
048      }
049    
050      /**
051       * get the field's TypeID object
052       */
053      public TypeID getTypeID() {
054        return typeID;
055      }
056      
057      /**
058       * get the field's id (name)
059       */
060      public String getFieldID() {
061        return fieldID;
062      }
063      
064      void write(RecordOutput rout, String tag) throws IOException {
065        rout.writeString(fieldID, tag);
066        typeID.write(rout, tag);
067      }
068      
069      /**
070       * Two FieldTypeInfos are equal if ach of their fields matches
071       */
072      public boolean equals(Object o) {
073        if (this == o) 
074          return true;
075        if (!(o instanceof FieldTypeInfo))
076          return false;
077        FieldTypeInfo fti = (FieldTypeInfo) o;
078        // first check if fieldID matches
079        if (!this.fieldID.equals(fti.fieldID)) {
080          return false;
081        }
082        // now see if typeID matches
083        return (this.typeID.equals(fti.typeID));
084      }
085      
086      /**
087       * We use a basic hashcode implementation, since this class will likely not
088       * be used as a hashmap key 
089       */
090      public int hashCode() {
091        return 37*17+typeID.hashCode() + 37*17+fieldID.hashCode();
092      }
093      
094    
095      public boolean equals(FieldTypeInfo ti) {
096        // first check if fieldID matches
097        if (!this.fieldID.equals(ti.fieldID)) {
098          return false;
099        }
100        // now see if typeID matches
101        return (this.typeID.equals(ti.typeID));
102      }
103    
104    }
105