/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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 com.asakusafw.runtime.io.util;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import java.io.IOException;
import java.util.Arrays;
import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableComparator;
/**
* Test helpders for writable objects.
*/
public class WritableTestRoot {
static byte[] ser(Writable writable) throws IOException {
DataOutputBuffer out = new DataOutputBuffer();
writable.write(out);
byte[] results = Arrays.copyOfRange(out.getData(), 0, out.getLength());
return results;
}
static byte[] ser(WritableRawComparable writable) throws IOException {
DataOutputBuffer out = new DataOutputBuffer();
writable.write(out);
assertThat(writable.getSizeInBytes(out.getData(), 0), is(out.getLength()));
byte[] results = Arrays.copyOfRange(out.getData(), 0, out.getLength());
return results;
}
static <T extends Writable> T des(T writable, byte[] serialized) throws IOException {
DataInputBuffer buf = new DataInputBuffer();
buf.reset(serialized, serialized.length);
writable.readFields(buf);
return writable;
}
static int cmp(WritableRawComparable a, WritableRawComparable b) throws IOException {
int cmp = a.compareTo(b);
assertThat(a.equals(b), is(cmp == 0));
if (cmp == 0) {
assertThat(a.hashCode(), is(b.hashCode()));
}
byte[] serA = ser(a);
byte[] serB = ser(b);
int serCmp = a.compareInBytes(serA, 0, serB, 0);
assertThat(serCmp, is(cmp));
return cmp;
}
static int cmp(WritableRawComparable a, WritableRawComparable b, WritableComparator comp) throws IOException {
int cmp = comp.compare(a, b);
byte[] serA = ser(a);
byte[] serB = ser(b);
int serCmp = comp.compare(serA, 0, serA.length, serB, 0, serB.length);
assertThat(serCmp, is(cmp));
return cmp;
}
}