hadoop Index 源码
haddop Index 代码
文件路径：/hadoop-tools/hadoop-streaming/src/main/java/org/apache/hadoop/record/Index.java
/**
* 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.hadoop.record;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Interface that acts as an iterator for deserializing maps.
* The deserializer returns an instance that the record uses to
* read vectors and maps. An example of usage is as follows:
*
* <code>
* Index idx = startVector(...);
* while (!idx.done()) {
* .... // read element of a vector
* idx.incr();
* }
* </code>
*
* @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>.
*/
@Deprecated
@InterfaceAudience.Public
@InterfaceStability.Stable
public interface Index {
boolean done();
void incr();
}
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