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19 package org.apache.giraph.io.internal;
20
21 import org.apache.giraph.io.EdgeInputFormat;
22 import org.apache.giraph.io.EdgeReader;
23 import org.apache.giraph.job.HadoopUtils;
24 import org.apache.hadoop.conf.Configuration;
25 import org.apache.hadoop.io.Writable;
26 import org.apache.hadoop.io.WritableComparable;
27 import org.apache.hadoop.mapreduce.InputSplit;
28 import org.apache.hadoop.mapreduce.JobContext;
29 import org.apache.hadoop.mapreduce.TaskAttemptContext;
30
31 import java.io.DataInput;
32 import java.io.DataOutput;
33 import java.io.IOException;
34 import java.util.List;
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46
47 public class WrappedEdgeInputFormat<I extends WritableComparable,
48 E extends Writable> extends EdgeInputFormat<I, E> {
49
50 private EdgeInputFormat<I, E> originalInputFormat;
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56
57 public WrappedEdgeInputFormat(
58 EdgeInputFormat<I, E> edgeInputFormat) {
59 originalInputFormat = edgeInputFormat;
60 }
61
62 @Override
63 public void checkInputSpecs(Configuration conf) {
64 originalInputFormat.checkInputSpecs(getConf());
65 }
66
67 @Override
68 public List<InputSplit> getSplits(JobContext context,
69 int minSplitCountHint) throws IOException, InterruptedException {
70 return originalInputFormat.getSplits(
71 HadoopUtils.makeJobContext(getConf(), context),
72 minSplitCountHint);
73 }
74
75 @Override
76 public EdgeReader<I, E> createEdgeReader(InputSplit split,
77 TaskAttemptContext context) throws IOException {
78 EdgeReader<I, E> edgeReader =
79 originalInputFormat.createEdgeReader(split,
80 HadoopUtils.makeTaskAttemptContext(getConf(), context));
81 return new WrappedEdgeReader<I, E>(edgeReader, getConf());
82 }
83
84 @Override
85 public void writeInputSplit(InputSplit inputSplit,
86 DataOutput dataOutput) throws IOException {
87 originalInputFormat.writeInputSplit(inputSplit, dataOutput);
88 }
89
90 @Override
91 public InputSplit readInputSplit(
92 DataInput dataInput) throws IOException, ClassNotFoundException {
93 return originalInputFormat.readInputSplit(dataInput);
94 }
95 }