index.java

来自「hadoop:Nutch集群平台」· Java 代码 · 共 38 行

/**
 * Copyright 2005 The Apache Software Foundation
 *
 * Licensed 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;

/**
 * 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>
 *
 * @author Milind Bhandarkar
 */
public interface Index {
    public boolean done();
    public void incr();
}