| /* |
| * 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; |
| } |
| } |
| |
| } |