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/*
* 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.
*/
/* $Id$ */
package org.apache.fop.pdf.xref;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.junit.Test;
import org.apache.fop.pdf.PDFObjectNumber;
public class CrossReferenceStreamTestCase extends CrossReferenceObjectTest {
private List<Long> uncompressedObjectOffsets;
private List<CompressedObjectReference> compressedObjectReferences;
@Test
public void testWithNoOffset() throws IOException {
List<Long> emptyList = Collections.emptyList();
test(emptyList);
}
@Test
public void testWithOffsets() throws IOException {
test(new ArrayList<Long>(Arrays.asList(0L, 1L, 2L, 3L, 4L)));
}
@Test
public void testWithBigOffsets() throws IOException {
test(new ArrayList<Long>(Arrays.asList(0xffL, 0xffffL, 0xffffffffL, 0xffffffffffffffffL)));
}
@Test
public void testWithObjectStreams1() throws IOException {
List<CompressedObjectReference> compressedObjectReferences =
Arrays.asList(new CompressedObjectReference(new PDFObjectNumber(2), new PDFObjectNumber(1), 0));
test(Arrays.asList(0L, null), compressedObjectReferences);
}
@Test
public void testWithObjectStreams2() throws IOException {
int numIndirectObjects = 2;
int numCompressedObjects = 1;
List<Long> indirectObjectOffsets
= new ArrayList<Long>(numIndirectObjects + numCompressedObjects);
for (long i = 0; i < numIndirectObjects; i++) {
indirectObjectOffsets.add(i);
}
List<CompressedObjectReference> compressedObjectReferences
= new ArrayList<CompressedObjectReference>();
for (int index = 0; index < numCompressedObjects; index++) {
indirectObjectOffsets.add(null);
int obNum = numIndirectObjects + index + 1;
compressedObjectReferences.add(new CompressedObjectReference(new PDFObjectNumber(obNum),
new PDFObjectNumber(numIndirectObjects), index));
}
test(indirectObjectOffsets, compressedObjectReferences);
}
private void test(List<Long> indirectObjectOffsets) throws IOException {
List<CompressedObjectReference> compressedObjectReferences = Collections.emptyList();
test(indirectObjectOffsets, compressedObjectReferences);
}
private void test(List<Long> indirectObjectOffsets,
List<CompressedObjectReference> compressedObjectReferences) throws IOException {
this.uncompressedObjectOffsets = indirectObjectOffsets;
this.compressedObjectReferences = compressedObjectReferences;
runTest();
}
@Override
protected CrossReferenceObject createCrossReferenceObject() {
return new CrossReferenceStream(pdfDocument,
uncompressedObjectOffsets.size() + 1,
trailerDictionary,
STARTXREF,
uncompressedObjectOffsets,
compressedObjectReferences);
}
@Override
protected byte[] createExpectedCrossReferenceData() throws IOException {
List<ObjectReference> objectReferences
= new ArrayList<ObjectReference>(uncompressedObjectOffsets.size());
for (Long offset : uncompressedObjectOffsets) {
objectReferences.add(offset == null ? null : new UncompressedObjectReference(offset));
}
for (CompressedObjectReference ref : compressedObjectReferences) {
objectReferences.set(ref.getObjectNumber().getNumber() - 1, ref);
}
int maxObjectNumber = objectReferences.size() + 1;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
StringBuilder expected = new StringBuilder(256);
expected.append(maxObjectNumber + " 0 obj\n")
.append("<<\n")
.append(" /Root 1 0 R\n")
.append(" /Info 2 0 R\n")
.append(" /ID [<0123456789ABCDEF> <0123456789ABCDEF>]\n")
.append(" /Type /XRef\n")
.append(" /Size ").append(Integer.toString(maxObjectNumber + 1)).append('\n')
.append(" /W [1 8 2]\n")
.append(" /Length ").append(Integer.toString((maxObjectNumber + 1) * 11)).append('\n')
.append(">>\n")
.append("stream\n");
stream.write(getBytes(expected));
DataOutputStream data = new DataOutputStream(stream);
data.write(new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, (byte) 0xff, (byte) 0xff});
for (ObjectReference objectReference : objectReferences) {
objectReference.output(data);
}
data.write(1);
data.writeLong(STARTXREF);
data.write(0);
data.write(0);
data.close();
stream.write(getBytes("\nendstream\nendobj\n"));
return stream.toByteArray();
}
}
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