Java tutorial
/* * 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: ResourceOptimizationTestCase.java 1198853 2011-11-07 18:18:29Z vhennebert $ */ package org.apache.fop.render.ps; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertNotNull; import static org.junit.Assert.assertTrue; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.Arrays; import java.util.Collection; import java.util.Set; import org.junit.Test; import org.apache.commons.io.IOUtils; import org.apache.xmlgraphics.ps.DSCConstants; import org.apache.xmlgraphics.ps.PSResource; import org.apache.xmlgraphics.ps.dsc.DSCException; import org.apache.xmlgraphics.ps.dsc.DSCListener; import org.apache.xmlgraphics.ps.dsc.DSCParser; import org.apache.xmlgraphics.ps.dsc.DefaultNestedDocumentHandler; import org.apache.xmlgraphics.ps.dsc.events.AbstractResourcesDSCComment; import org.apache.xmlgraphics.ps.dsc.events.DSCAtend; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentBeginDocument; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentDocumentNeededResources; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentDocumentSuppliedResources; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentEndOfFile; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentIncludeResource; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentPage; import org.apache.xmlgraphics.ps.dsc.events.DSCCommentPages; import org.apache.fop.apps.FOUserAgent; import org.apache.fop.render.intermediate.IFContext; /** * Tests the PostScript resource optimization (selective de-duplication of * images that are used multiple times). */ public class ResourceOptimizationTestCase extends AbstractPostScriptTest { /** * Tests resource optimization. * @throws Exception if an error occurs */ @Test public void testResourceOptimization() throws Exception { FOUserAgent ua = fopFactory.newFOUserAgent(); PSDocumentHandler handler = new PSDocumentHandler(); handler.setContext(new IFContext(ua)); // This is the important part: we're enabling resource optimization handler.getPSUtil().setOptimizeResources(true); ua.setDocumentHandlerOverride(handler); // Prepare output file File outputFile = renderFile(ua, "ps-resources.fo", "-if-l" + handler.getPSUtil().getLanguageLevel()); verifyPostScriptFile(outputFile); } private void verifyPostScriptFile(File psFile) throws IOException, DSCException { InputStream in = new java.io.FileInputStream(psFile); in = new java.io.BufferedInputStream(in); try { DSCParser parser = new DSCParser(in); //The first form is for arrow_down_small.png (to be reused) PSResource form1 = new PSResource(PSResource.TYPE_FORM, "FOPForm:1"); PSResource helvetica = new PSResource(PSResource.TYPE_FONT, "Helvetica"); PSResource helveticaBold = new PSResource(PSResource.TYPE_FONT, "Helvetica-Bold"); PSResource res; DSCCommentPages pages = (DSCCommentPages) gotoDSCComment(parser, DSCConstants.PAGES); assertEquals(2, pages.getPageCount()); DSCCommentDocumentSuppliedResources supplied = (DSCCommentDocumentSuppliedResources) gotoDSCComment( parser, DSCConstants.DOCUMENT_SUPPLIED_RESOURCES); Set resources = supplied.getResources(); assertEquals(5, resources.size()); assertTrue(resources.contains(form1)); assertTrue("Expected barcode.eps as supplied resource", resources.contains(new PSResource(PSResource.TYPE_FILE, "test/resources/images/barcode.eps"))); DSCCommentDocumentNeededResources needed = (DSCCommentDocumentNeededResources) gotoDSCComment(parser, DSCConstants.DOCUMENT_NEEDED_RESOURCES); resources = needed.getResources(); assertEquals(2, resources.size()); assertTrue("Expected Helvetica as needed resource", resources.contains(new PSResource(PSResource.TYPE_FONT, "Helvetica"))); assertTrue("Expected Helvetica-Bold as needed resource", resources.contains(new PSResource(PSResource.TYPE_FONT, "Helvetica-Bold"))); //Some document structure checking assertNotNull(gotoDSCComment(parser, DSCConstants.BEGIN_DEFAULTS)); assertNotNull(gotoDSCComment(parser, DSCConstants.END_DEFAULTS)); assertNotNull(gotoDSCComment(parser, DSCConstants.BEGIN_PROLOG)); assertNotNull(gotoDSCComment(parser, DSCConstants.END_PROLOG)); assertNotNull(gotoDSCComment(parser, DSCConstants.BEGIN_SETUP)); //Check includes for the two referenced base 14 fonts DSCCommentIncludeResource include; Collection strings = new java.util.HashSet( Arrays.asList(new String[] { "Helvetica", "Helvetica-Bold" })); for (int i = 0; i < 2; i++) { include = (DSCCommentIncludeResource) gotoDSCComment(parser, DSCConstants.INCLUDE_RESOURCE); res = include.getResource(); assertEquals(PSResource.TYPE_FONT, res.getType()); strings.remove(res.getName()); } assertEquals(0, strings.size()); checkResourceComment(parser, DSCConstants.BEGIN_RESOURCE, new PSResource(PSResource.TYPE_ENCODING, "WinAnsiEncoding")); //Here, we encounter form 1 again checkResourceComment(parser, DSCConstants.BEGIN_RESOURCE, form1); assertNotNull(gotoDSCComment(parser, DSCConstants.END_SETUP)); //Now the actual pages begin //---=== Page 1 ===--- DSCCommentPage page = (DSCCommentPage) gotoDSCComment(parser, DSCConstants.PAGE); assertEquals(1, page.getPagePosition()); assertEquals(DSCAtend.class, gotoDSCComment(parser, DSCConstants.PAGE_RESOURCES).getClass()); assertNotNull(gotoDSCComment(parser, DSCConstants.BEGIN_PAGE_SETUP)); assertNotNull(gotoDSCComment(parser, DSCConstants.END_PAGE_SETUP)); PSResource form2 = new PSResource(PSResource.TYPE_FORM, "FOPForm:2"); checkResourceComment(parser, DSCConstants.BEGIN_RESOURCE, form2); assertNotNull(gotoDSCComment(parser, DSCConstants.PAGE_TRAILER)); AbstractResourcesDSCComment pageResources; pageResources = (AbstractResourcesDSCComment) gotoDSCComment(parser, DSCConstants.PAGE_RESOURCES); resources = pageResources.getResources(); assertEquals(5, resources.size()); assertTrue(resources.contains(form1)); assertTrue(resources.contains(form2)); assertTrue(resources.contains(helvetica)); assertTrue(resources.contains(helveticaBold)); //---=== Page 2 ===--- page = (DSCCommentPage) gotoDSCComment(parser, DSCConstants.PAGE); assertEquals(2, page.getPagePosition()); assertEquals(DSCAtend.class, gotoDSCComment(parser, DSCConstants.PAGE_RESOURCES).getClass()); assertNotNull(gotoDSCComment(parser, DSCConstants.BEGIN_PAGE_SETUP)); assertNotNull(gotoDSCComment(parser, DSCConstants.END_PAGE_SETUP)); DSCCommentBeginDocument beginDocument; beginDocument = (DSCCommentBeginDocument) gotoDSCComment(parser, DSCConstants.BEGIN_DOCUMENT); assertEquals("test/resources/images/barcode.eps", beginDocument.getResource().getName()); DSCListener listener = new DefaultNestedDocumentHandler(null); listener.processEvent(beginDocument, parser); //And again (the barcode is generated twice) beginDocument = (DSCCommentBeginDocument) gotoDSCComment(parser, DSCConstants.BEGIN_DOCUMENT); assertEquals("test/resources/images/barcode.eps", beginDocument.getResource().getName()); listener.processEvent(beginDocument, parser); assertNotNull(gotoDSCComment(parser, DSCConstants.PAGE_TRAILER)); pageResources = (AbstractResourcesDSCComment) gotoDSCComment(parser, DSCConstants.PAGE_RESOURCES); resources = pageResources.getResources(); assertEquals(6, resources.size()); assertTrue(resources.contains(form1)); assertFalse(resources.contains(form2)); assertTrue(resources.contains(helvetica)); assertTrue(resources.contains(helveticaBold)); assertTrue(resources.contains(beginDocument.getResource())); assertNotNull(gotoDSCComment(parser, DSCConstants.TRAILER)); //No headers in between, as they should have been put at the beginning of the file assertEquals(DSCCommentEndOfFile.class, parser.nextEvent().asDSCComment().getClass()); } finally { IOUtils.closeQuietly(in); } } }