http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * 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: PDFWritable.java 1228243 2012-01-06 16:03:44Z cbowditch $ */

package org.apache.fop.pdf;

import java.io.IOException;
import java.io.OutputStream;


This interface is implemented by classes that can be serialized to a PDF file either by
serializing the object or by writing a indirect reference to the actual object.

/**
 * This interface is implemented by classes that can be serialized to a PDF file either by
 * serializing the object or by writing a indirect reference to the actual object.
 */
public interface PDFWritable {

    
Writes a "direct object" (inline object) representation to the stream. A text buffer is given
for optimized encoding of text content.

 IMPORTANT: If you need to write out binary output, call PDFDocument.flushTextBuffer(StringBuilder, OutputStream) before writing any content to the OutputStream! 
Params:
  • out – the OutputStream (for binary content)
  • textBuffer – the text buffer for text content
Throws:
/**
     * Writes a "direct object" (inline object) representation to the stream. A text buffer is given
     * for optimized encoding of text content.
     * <p>
     * IMPORTANT: If you need to write out binary output, call
     * {@link PDFDocument#flushTextBuffer(StringBuilder, OutputStream)} before writing any content
     * to the {@link OutputStream}!
     * @param out the OutputStream (for binary content)
     * @param textBuffer the text buffer for text content
     * @throws IOException if an I/O error occurs
     */
    void outputInline(OutputStream out, StringBuilder textBuffer) throws IOException;

}