| /** |
| * 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.mapreduce.lib.map; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configuration.IntegerRanges; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.RawComparator; |
| import org.apache.hadoop.mapreduce.Counter; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.JobID; |
| import org.apache.hadoop.mapreduce.MapContext; |
| import org.apache.hadoop.mapreduce.Mapper; |
| import org.apache.hadoop.mapreduce.OutputCommitter; |
| import org.apache.hadoop.mapreduce.OutputFormat; |
| import org.apache.hadoop.mapreduce.Partitioner; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.TaskAttemptID; |
| import org.apache.hadoop.security.Credentials; |
| |
| /** |
| * A {@link Mapper} which wraps a given one to allow custom |
| * {@link Mapper.Context} implementations. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class WrappedMapper<KEYIN, VALUEIN, KEYOUT, VALUEOUT> |
| extends Mapper<KEYIN, VALUEIN, KEYOUT, VALUEOUT> { |
| |
| /** |
| * Get a wrapped {@link Mapper.Context} for custom implementations. |
| * @param mapContext <code>MapContext</code> to be wrapped |
| * @return a wrapped <code>Mapper.Context</code> for custom implementations |
| */ |
| public Mapper<KEYIN, VALUEIN, KEYOUT, VALUEOUT>.Context |
| getMapContext(MapContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> mapContext) { |
| return new Context(mapContext); |
| } |
| |
| @InterfaceStability.Evolving |
| public class Context |
| extends Mapper<KEYIN, VALUEIN, KEYOUT, VALUEOUT>.Context { |
| |
| protected MapContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> mapContext; |
| |
| public Context(MapContext<KEYIN, VALUEIN, KEYOUT, VALUEOUT> mapContext) { |
| this.mapContext = mapContext; |
| } |
| |
| /** |
| * Get the input split for this map. |
| */ |
| public InputSplit getInputSplit() { |
| return mapContext.getInputSplit(); |
| } |
| |
| @Override |
| public KEYIN getCurrentKey() throws IOException, InterruptedException { |
| return mapContext.getCurrentKey(); |
| } |
| |
| @Override |
| public VALUEIN getCurrentValue() throws IOException, InterruptedException { |
| return mapContext.getCurrentValue(); |
| } |
| |
| @Override |
| public boolean nextKeyValue() throws IOException, InterruptedException { |
| return mapContext.nextKeyValue(); |
| } |
| |
| @Override |
| public Counter getCounter(Enum<?> counterName) { |
| return mapContext.getCounter(counterName); |
| } |
| |
| @Override |
| public Counter getCounter(String groupName, String counterName) { |
| return mapContext.getCounter(groupName, counterName); |
| } |
| |
| @Override |
| public OutputCommitter getOutputCommitter() { |
| return mapContext.getOutputCommitter(); |
| } |
| |
| @Override |
| public void write(KEYOUT key, VALUEOUT value) throws IOException, |
| InterruptedException { |
| mapContext.write(key, value); |
| } |
| |
| @Override |
| public String getStatus() { |
| return mapContext.getStatus(); |
| } |
| |
| @Override |
| public TaskAttemptID getTaskAttemptID() { |
| return mapContext.getTaskAttemptID(); |
| } |
| |
| @Override |
| public void setStatus(String msg) { |
| mapContext.setStatus(msg); |
| } |
| |
| @Override |
| public Path[] getArchiveClassPaths() { |
| return mapContext.getArchiveClassPaths(); |
| } |
| |
| @Override |
| public String[] getArchiveTimestamps() { |
| return mapContext.getArchiveTimestamps(); |
| } |
| |
| @Override |
| public URI[] getCacheArchives() throws IOException { |
| return mapContext.getCacheArchives(); |
| } |
| |
| @Override |
| public URI[] getCacheFiles() throws IOException { |
| return mapContext.getCacheArchives(); |
| } |
| |
| @Override |
| public Class<? extends Reducer<?, ?, ?, ?>> getCombinerClass() |
| throws ClassNotFoundException { |
| return mapContext.getCombinerClass(); |
| } |
| |
| @Override |
| public Configuration getConfiguration() { |
| return mapContext.getConfiguration(); |
| } |
| |
| @Override |
| public Path[] getFileClassPaths() { |
| return mapContext.getFileClassPaths(); |
| } |
| |
| @Override |
| public String[] getFileTimestamps() { |
| return mapContext.getFileTimestamps(); |
| } |
| |
| @Override |
| public RawComparator<?> getGroupingComparator() { |
| return mapContext.getGroupingComparator(); |
| } |
| |
| @Override |
| public Class<? extends InputFormat<?, ?>> getInputFormatClass() |
| throws ClassNotFoundException { |
| return mapContext.getInputFormatClass(); |
| } |
| |
| @Override |
| public String getJar() { |
| return mapContext.getJar(); |
| } |
| |
| @Override |
| public JobID getJobID() { |
| return mapContext.getJobID(); |
| } |
| |
| @Override |
| public String getJobName() { |
| return mapContext.getJobName(); |
| } |
| |
| @Override |
| public boolean getJobSetupCleanupNeeded() { |
| return mapContext.getJobSetupCleanupNeeded(); |
| } |
| |
| @Override |
| public boolean getTaskCleanupNeeded() { |
| return mapContext.getTaskCleanupNeeded(); |
| } |
| |
| @Override |
| public Path[] getLocalCacheArchives() throws IOException { |
| return mapContext.getLocalCacheArchives(); |
| } |
| |
| @Override |
| public Path[] getLocalCacheFiles() throws IOException { |
| return mapContext.getLocalCacheFiles(); |
| } |
| |
| @Override |
| public Class<?> getMapOutputKeyClass() { |
| return mapContext.getMapOutputKeyClass(); |
| } |
| |
| @Override |
| public Class<?> getMapOutputValueClass() { |
| return mapContext.getMapOutputValueClass(); |
| } |
| |
| @Override |
| public Class<? extends Mapper<?, ?, ?, ?>> getMapperClass() |
| throws ClassNotFoundException { |
| return mapContext.getMapperClass(); |
| } |
| |
| @Override |
| public int getMaxMapAttempts() { |
| return mapContext.getMaxMapAttempts(); |
| } |
| |
| @Override |
| public int getMaxReduceAttempts() { |
| return mapContext.getMaxReduceAttempts(); |
| } |
| |
| @Override |
| public int getNumReduceTasks() { |
| return mapContext.getNumReduceTasks(); |
| } |
| |
| @Override |
| public Class<? extends OutputFormat<?, ?>> getOutputFormatClass() |
| throws ClassNotFoundException { |
| return mapContext.getOutputFormatClass(); |
| } |
| |
| @Override |
| public Class<?> getOutputKeyClass() { |
| return mapContext.getOutputKeyClass(); |
| } |
| |
| @Override |
| public Class<?> getOutputValueClass() { |
| return mapContext.getOutputValueClass(); |
| } |
| |
| @Override |
| public Class<? extends Partitioner<?, ?>> getPartitionerClass() |
| throws ClassNotFoundException { |
| return mapContext.getPartitionerClass(); |
| } |
| |
| @Override |
| public Class<? extends Reducer<?, ?, ?, ?>> getReducerClass() |
| throws ClassNotFoundException { |
| return mapContext.getReducerClass(); |
| } |
| |
| @Override |
| public RawComparator<?> getSortComparator() { |
| return mapContext.getSortComparator(); |
| } |
| |
| @Override |
| public boolean getSymlink() { |
| return mapContext.getSymlink(); |
| } |
| |
| @Override |
| public Path getWorkingDirectory() throws IOException { |
| return mapContext.getWorkingDirectory(); |
| } |
| |
| @Override |
| public void progress() { |
| mapContext.progress(); |
| } |
| |
| @Override |
| public boolean getProfileEnabled() { |
| return mapContext.getProfileEnabled(); |
| } |
| |
| @Override |
| public String getProfileParams() { |
| return mapContext.getProfileParams(); |
| } |
| |
| @Override |
| public IntegerRanges getProfileTaskRange(boolean isMap) { |
| return mapContext.getProfileTaskRange(isMap); |
| } |
| |
| @Override |
| public String getUser() { |
| return mapContext.getUser(); |
| } |
| |
| @Override |
| public Credentials getCredentials() { |
| return mapContext.getCredentials(); |
| } |
| |
| @Override |
| public float getProgress() { |
| return mapContext.getProgress(); |
| } |
| } |
| } |