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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;
import static org.junit.Assert.assertEquals;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
public class ObjectStreamTestCase {
private static final String OBJECT_CONTENT = "<<\n /Foo True\n /Bar False\n>>\n";
private PDFDocument pdfDocument;
private ObjectStream objectStream;
private List<MockCompressedObject> compressedObjects;
@Before
public void setUp() throws Exception {
pdfDocument = new PDFDocument("PDFObjectStreamTestCase");
objectStream = new ObjectStream();
pdfDocument.assignObjectNumber(objectStream);
compressedObjects = Arrays.asList(new MockCompressedObject(), new MockCompressedObject());
}
@Test
public void testSingleObjectStream() throws IOException {
populateObjectStream();
testOutput();
}
@Test
public void testObjectStreamCollection() throws IOException {
objectStream = new ObjectStream(objectStream);
pdfDocument.assignObjectNumber(objectStream);
populateObjectStream();
testOutput();
}
@Test(expected = IllegalStateException.class)
public void directObjectsAreNotAllowed() throws Exception {
objectStream.addObject(new MockCompressedObject());
}
@Test(expected = NullPointerException.class)
public void nullObjectsAreNotAllowed() throws Exception {
objectStream.addObject(null);
}
private void testOutput() throws IOException {
String expected = getExpectedOutput();
String actual = getActualOutput();
assertEquals(expected, actual);
}
private void populateObjectStream() {
for (MockCompressedObject obj : compressedObjects) {
pdfDocument.assignObjectNumber(obj);
objectStream.addObject(obj);
}
}
private String getExpectedOutput() {
int numObs = compressedObjects.size();
int objectStreamNumber = objectStream.getObjectNumber();
int offsetsLength = 9;
StringBuilder expected = new StringBuilder();
expected.append("<<\n");
ObjectStream previous = (ObjectStream) objectStream.get("Extends");
if (previous != null) {
expected.append(" /Extends ").append(previous.getObjectNumber()).append(" 0 R\n");
}
expected.append(" /Type /ObjStm\n")
.append(" /N ").append(numObs).append("\n")
.append(" /First ").append(offsetsLength).append('\n')
.append(" /Length ").append(OBJECT_CONTENT.length() * 2 + offsetsLength + 1).append('\n')
.append(">>\n")
.append("stream\n");
int offset = 0;
int num = 1;
for (PDFObject ob : compressedObjects) {
expected.append(objectStreamNumber + num++).append(' ').append(offset).append('\n');
offset += ob.toPDFString().length();
}
for (PDFObject ob : compressedObjects) {
expected.append(ob.toPDFString());
}
expected.append("\nendstream");
return expected.toString();
}
private String getActualOutput() throws IOException {
ByteArrayOutputStream actual = new ByteArrayOutputStream();
objectStream.getFilterList().setDisableAllFilters(true);
objectStream.output(actual);
return actual.toString("US-ASCII");
}
private static class MockCompressedObject extends PDFObject implements CompressedObject {
@Override
protected String toPDFString() {
return OBJECT_CONTENT;
}
}
}
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