/* Copyright 2014 The jeo project. All rights reserved.
*
* 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 io.jeo.raster;
import io.jeo.util.Dimension;
import org.junit.Test;
import java.nio.BufferUnderflowException;
import java.nio.ByteBuffer;
import java.nio.IntBuffer;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class DataBufferTest {
@Test
public void testGet() throws Exception {
ByteBuffer bbuf = ByteBuffer.allocate(16);
bbuf.asIntBuffer().put(1).put(2).put(3).put(4);
DataBuffer<Byte> nbuf = DataBuffer.create(bbuf, DataType.BYTE);
for (int i = 0; i < 4; i++) {
assertEquals(0, nbuf.get().byteValue());
assertEquals(0, nbuf.get().byteValue());
assertEquals(0, nbuf.get().byteValue());
assertEquals((byte)(i+1), nbuf.get().byteValue());
}
}
@Test
public void testGetAt() throws Exception {
ByteBuffer bbuf = ByteBuffer.allocate(16);
bbuf.asIntBuffer().put(1).put(2).put(3).put(4);
DataBuffer<Byte> nbuf = DataBuffer.create(bbuf, DataType.BYTE);
for (int i = 0; i < 4; i++) {
assertEquals((byte) (i + 1), nbuf.get((i + 1) * 4 - 1).byteValue());
}
}
@Test
public void testPut() throws Exception {
ByteBuffer bbuf = ByteBuffer.allocate(16);
DataBuffer<Byte> nbuf = DataBuffer.create(bbuf, DataType.BYTE);
for (int i = 0; i < 4; i++) {
nbuf.put((byte)0).put((byte)0).put((byte)0).put((byte) (i + 1));
}
bbuf.flip();
IntBuffer ibuf = bbuf.asIntBuffer();
assertEquals(1, ibuf.get());
assertEquals(2, ibuf.get());
assertEquals(3, ibuf.get());
assertEquals(4, ibuf.get());
}
@Test
public void testPutAt() throws Exception {
ByteBuffer bbuf = ByteBuffer.allocate(16);
for (int i = 0; i < 16; i++) {
bbuf.put((byte)0);
}
DataBuffer<Byte> nbuf = DataBuffer.create(bbuf, DataType.BYTE);
for (int i = 0; i < 4; i++) {
nbuf.put((i + 1) * 4 - 1, (byte)(i+1));
}
bbuf.flip();
IntBuffer ibuf = bbuf.asIntBuffer();
assertEquals(1, ibuf.get());
assertEquals(2, ibuf.get());
assertEquals(3, ibuf.get());
assertEquals(4, ibuf.get());
}
@Test
public void testResample() {
DataBuffer nbuf = DataBuffer.create(4, DataType.INT);
nbuf.put(1).put(2).put(3).put(4);
DataBuffer rbuf = DataBuffer.resample(nbuf, new Dimension(2, 2), new Dimension(4,4));
assertEquals(1, rbuf.get());
assertEquals(1, rbuf.get());
assertEquals(2, rbuf.get());
assertEquals(2, rbuf.get());
assertEquals(1, rbuf.get());
assertEquals(1, rbuf.get());
assertEquals(2, rbuf.get());
assertEquals(2, rbuf.get());
assertEquals(3, rbuf.get());
assertEquals(3, rbuf.get());
assertEquals(4, rbuf.get());
assertEquals(4, rbuf.get());
assertEquals(3, rbuf.get());
assertEquals(3, rbuf.get());
assertEquals(4, rbuf.get());
assertEquals(4, rbuf.get());
try {
rbuf.get();
fail();
}
catch(BufferUnderflowException e) {
}
}
}