| /* SimpleDoc.java -- |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.print; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.CharArrayReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.Reader; |
| import java.io.StringReader; |
| |
| import javax.print.attribute.AttributeSetUtilities; |
| import javax.print.attribute.DocAttributeSet; |
| |
| /** |
| * Simple implementation of the <code>Doc</code> interface capable of handling |
| * the predefined document flavors of <code>DocFlavor</code>. |
| * <p> |
| * This implementation can construct a reader or stream for the service from |
| * the print data and ensures that always the same object is returned on each |
| * method call. It does simple checks that the supplied data matches the |
| * specified flavor of the doc object and supports thread safe access. |
| * </p> |
| * |
| * @author Wolfgang Baer (WBaer@gmx.de) |
| */ |
| public final class SimpleDoc implements Doc |
| { |
| private final Object printData; |
| private final DocFlavor flavor; |
| private final DocAttributeSet attributes; |
| |
| private InputStream stream; |
| private Reader reader; |
| |
| /** |
| * Constructs a SimpleDoc with the specified print data, doc flavor and doc attribute set. |
| * @param printData the object with the data to print. |
| * @param flavor the document flavor of the print data. |
| * @param attributes the attributes of the doc (may be <code>null</code>). |
| * |
| * @throws IllegalArgumentException if either <code>printData</code> or |
| * <code>flavor</code> are <code>null</code>, or the print data is not |
| * supplied in the document format specified by the given flavor object. |
| */ |
| public SimpleDoc(Object printData, DocFlavor flavor, |
| DocAttributeSet attributes) |
| { |
| if (printData == null || flavor == null) |
| throw new IllegalArgumentException("printData/flavor may not be null"); |
| |
| if (! (printData.getClass().getName().equals( |
| flavor.getRepresentationClassName()) |
| || flavor.getRepresentationClassName().equals("java.io.Reader") |
| && printData instanceof Reader |
| || flavor.getRepresentationClassName().equals("java.io.InputStream") |
| && printData instanceof InputStream)) |
| { |
| throw new IllegalArgumentException("data is not of declared flavor type"); |
| } |
| |
| this.printData = printData; |
| this.flavor = flavor; |
| |
| if (attributes != null) |
| this.attributes = AttributeSetUtilities.unmodifiableView(attributes); |
| else |
| this.attributes = null; |
| |
| stream = null; |
| reader = null; |
| } |
| |
| /** |
| * Returns the unmodifiable view of the attributes of this doc object. |
| * <p> |
| * The attributes of this doc's attributes set overrides attributes of |
| * the same category in the print job's attribute set. If an attribute |
| * is not available in this doc's attributes set or <code>null</code> |
| * is returned the attributes of the same category of the print job are |
| * used. |
| * </p> |
| * |
| * @return The unmodifiable attributes set, or <code>null</code>. |
| */ |
| public DocAttributeSet getAttributes() |
| { |
| return attributes; |
| } |
| |
| /** |
| * Returns the flavor of this doc objects print data. |
| * |
| * @return The document flavor. |
| */ |
| public DocFlavor getDocFlavor() |
| { |
| return flavor; |
| } |
| |
| /** |
| * Returns the print data of this doc object. |
| * <p> |
| * The returned object is an instance as described by the associated |
| * document flavor ({@link DocFlavor#getRepresentationClassName()}) |
| * and can be cast to this representation class. |
| * </p> |
| * |
| * @return The print data in the representation class. |
| * @throws IOException if representation class is a stream and I/O |
| * exception occures. |
| */ |
| public Object getPrintData() throws IOException |
| { |
| return printData; |
| } |
| |
| /** |
| * Returns a <code>Reader</code> object for extracting character print data |
| * from this document. |
| * <p> |
| * This method is supported if the document flavor is of type: |
| * <ul> |
| * <li><code>char[]</code></li> |
| * <li><code>java.lang.String</code></li> |
| * <li><code>java.io.Reader</code></li> |
| * </ul> |
| * otherwise this method returns <code>null</code>. |
| * </p> |
| * |
| * @return The <code>Reader</code> object, or <code>null</code>. |
| * |
| * @throws IOException if an error occurs. |
| */ |
| public Reader getReaderForText() throws IOException |
| { |
| synchronized (this) |
| { |
| // construct the reader if applicable on request |
| if (reader == null) |
| { |
| if (flavor instanceof DocFlavor.CHAR_ARRAY) |
| reader = new CharArrayReader((char[]) printData); |
| else if (flavor instanceof DocFlavor.STRING) |
| reader = new StringReader((String) printData); |
| else if (flavor instanceof DocFlavor.READER) |
| reader = (Reader) printData; |
| } |
| |
| return reader; |
| } |
| } |
| |
| /** |
| * Returns an <code>InputStream</code> object for extracting byte print data |
| * from this document. |
| * <p> |
| * This method is supported if the document flavor is of type: |
| * <ul> |
| * <li><code>byte[]</code></li> |
| * <li><code>java.io.InputStream</code></li> |
| * </ul> |
| * otherwise this method returns <code>null</code>. |
| * </p> |
| * |
| * @return The <code>InputStream</code> object, or <code>null</code>. |
| * |
| * @throws IOException if an error occurs. |
| */ |
| public InputStream getStreamForBytes() throws IOException |
| { |
| synchronized (this) |
| { |
| // construct the stream if applicable on request |
| if (stream == null) |
| { |
| if (flavor instanceof DocFlavor.BYTE_ARRAY) |
| stream = new ByteArrayInputStream((byte[]) printData); |
| else if (flavor instanceof DocFlavor.INPUT_STREAM) |
| stream = (InputStream) printData; |
| } |
| |
| return stream; |
| } |
| } |
| |
| } |