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* 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,
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package org.elasticsearch.common.bytes;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefBuilder;
import org.apache.lucene.util.BytesRefIterator;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.ReleasableBytesStreamOutput;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class CompositeBytesReferenceTests extends AbstractBytesReferenceTestCase {
@Override
protected BytesReference newBytesReference(int length) throws IOException {
// we know bytes stream output always creates a paged bytes reference, we use it to create randomized content
List<BytesReference> referenceList = newRefList(length);
BytesReference ref = new CompositeBytesReference(referenceList.toArray(new BytesReference[0]));
assertEquals(length, ref.length());
return ref;
}
private List<BytesReference> newRefList(int length) throws IOException {
List<BytesReference> referenceList = new ArrayList<>();
for (int i = 0; i < length;) {
int remaining = length-i;
int sliceLength = randomIntBetween(1, remaining);
ReleasableBytesStreamOutput out = new ReleasableBytesStreamOutput(sliceLength, bigarrays);
for (int j = 0; j < sliceLength; j++) {
out.writeByte((byte) random().nextInt(1 << 8));
}
assertEquals(sliceLength, out.size());
referenceList.add(out.bytes());
i+=sliceLength;
}
return referenceList;
}
public void testCompositeBuffer() throws IOException {
List<BytesReference> referenceList = newRefList(randomIntBetween(1, PAGE_SIZE * 2));
BytesReference ref = new CompositeBytesReference(referenceList.toArray(new BytesReference[0]));
BytesRefIterator iterator = ref.iterator();
BytesRefBuilder builder = new BytesRefBuilder();
for (BytesReference reference : referenceList) {
BytesRefIterator innerIter = reference.iterator(); // sometimes we have a paged ref - pull an iter and walk all pages!
BytesRef scratch;
while ((scratch = innerIter.next()) != null) {
BytesRef next = iterator.next();
assertNotNull(next);
assertEquals(next, scratch);
builder.append(next);
}
}
assertNull(iterator.next());
int offset = 0;
for (BytesReference reference : referenceList) {
assertEquals(reference, ref.slice(offset, reference.length()));
int probes = randomIntBetween(Math.min(10, reference.length()), reference.length());
for (int i = 0; i < probes; i++) {
int index = randomIntBetween(0, reference.length()-1);
assertEquals(ref.get(offset + index), reference.get(index));
}
offset += reference.length();
}
BytesArray array = new BytesArray(builder.toBytesRef());
assertEquals(array, ref);
assertEquals(array.hashCode(), ref.hashCode());
BytesStreamOutput output = new BytesStreamOutput();
ref.writeTo(output);
assertEquals(array, output.bytes());
}
@Override
public void testToBytesRefSharedPage() throws IOException {
// CompositeBytesReference doesn't share pages
}
@Override
public void testSliceArrayOffset() throws IOException {
// the assertions in this test only work on no-composite buffers
}
@Override
public void testSliceToBytesRef() throws IOException {
// CompositeBytesReference shifts offsets
}
}