123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134 |
- /*
- * 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.apps;
-
- // Java
- import java.io.OutputStream;
-
- import org.xml.sax.helpers.DefaultHandler;
-
- import org.apache.fop.fo.FOTreeBuilder;
-
- /**
- * Primary class that activates the FOP process for embedded usage.
- * <P>
- * JAXP is the standard method of embedding FOP in Java programs.
- * Please check our
- * <a href="http://xmlgraphics.apache.org/fop/trunk/embedding.html">embedding page</a>
- * for samples (these are also available within the distribution in
- * FOP_DIR\examples\embedding)
- * <P>
- * Methods within FOUserAgent are available to customize portions of the
- * process. For example, a specific Renderer object can be specified,
- * also ElementMappings which determine elements in the FO that can be
- * processed) can be added.
- * <P>
- * At the moment, it is recommended not to reuse an instance of this
- * class for more than one rendering run.
- */
- public class Fop {
-
- // desired output format: MIME type such as "application/pdf", "application/postscript" etc.
- private String outputFormat = null;
-
- // output stream to send results to
- private OutputStream stream = null;
-
- // FOUserAgent object to set processing options
- private FOUserAgent foUserAgent = null;
-
- // FOTreeBuilder object to maintain reference for access to results
- private FOTreeBuilder foTreeBuilder = null;
-
- /**
- * Constructor for use with already-created FOUserAgents. It uses MIME types to select the
- * output format (ex. "application/pdf" for PDF).
- * @param outputFormat the MIME type of the output format to use (ex. "application/pdf").
- * @param ua FOUserAgent object
- * @param stream the output stream
- * @throws FOPException if setting up the DefaultHandler fails
- */
- Fop(String outputFormat, FOUserAgent ua, OutputStream stream) throws FOPException {
- this.outputFormat = outputFormat;
-
- foUserAgent = ua;
- if (foUserAgent == null) {
- foUserAgent = FopFactory.newInstance().newFOUserAgent();
- }
-
- this.stream = stream;
-
- createDefaultHandler();
- }
-
- /**
- * Get the FOUserAgent instance associated with the rendering run represented by this instance.
- * @return the user agent
- */
- public FOUserAgent getUserAgent() {
- return foUserAgent;
- }
-
- /**
- * Creates a DefaultHandler object used to generate the document.
- * Note this object implements the ContentHandler interface.
- * For processing with a Transformer object, this DefaultHandler object
- * can be used in the SAXResult constructor.
- * Alternatively, for processing with a SAXParser, this object can be
- * used as the DefaultHandler argument to its parse() methods.
- *
- * @throws FOPException if setting up the DefaultHandler fails
- */
- private void createDefaultHandler() throws FOPException {
- this.foTreeBuilder = new FOTreeBuilder(outputFormat, foUserAgent, stream);
- }
-
- /**
- * Returns the DefaultHandler object that will receive the SAX stream containing the
- * FO document to be rendered.
- * @return the SAX DefaultHandler for handling the SAX events.
- * @throws FOPException if setting up the DefaultHandler fails
- */
- public DefaultHandler getDefaultHandler() throws FOPException {
- if (foTreeBuilder == null) {
- createDefaultHandler();
- }
- return this.foTreeBuilder;
- }
-
- /**
- * Returns the results of the rendering process. Information includes
- * the total number of pages generated and the number of pages per
- * page-sequence. Call this method only after the rendering process is
- * finished. Note that the results are only available for output formats
- * which make use of FOP's layout engine (PDF, PS, etc.).
- * @return the results of the rendering process, or null for flow-oriented
- * output formats like RTF and MIF.
- */
- public FormattingResults getResults() {
- if (foTreeBuilder == null) {
- throw new IllegalStateException(
- "Results are only available after calling getDefaultHandler().");
- } else {
- return foTreeBuilder.getResults();
- }
- }
-
- }
|