| /* |
| * 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.afp.goca; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| import org.apache.fop.afp.util.BinaryUtils; |
| |
| /** |
| * A GOCA graphics segment |
| */ |
| public final class GraphicsChainedSegment extends AbstractGraphicsDrawingOrderContainer { |
| |
| /** The maximum segment data length */ |
| protected static final int MAX_DATA_LEN = 8192; |
| |
| private byte[] predecessorNameBytes; |
| |
| /** |
| * Main constructor |
| * |
| * @param name |
| * the name of this graphics segment |
| */ |
| public GraphicsChainedSegment(String name) { |
| super(name); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param name |
| * the name of this graphics segment |
| * @param predecessorNameBytes |
| * the name of the predecessor in this chain |
| */ |
| public GraphicsChainedSegment(String name, byte[] predecessorNameBytes) { |
| super(name); |
| this.predecessorNameBytes = predecessorNameBytes; |
| } |
| |
| /** {@inheritDoc} */ |
| public int getDataLength() { |
| return 14 + super.getDataLength(); |
| } |
| |
| private static final byte APPEND_NEW_SEGMENT = 0; |
| // private static final byte PROLOG = 4; |
| // private static final byte APPEND_TO_EXISING = 48; |
| |
| private static final int NAME_LENGTH = 4; |
| |
| /** {@inheritDoc} */ |
| protected int getNameLength() { |
| return NAME_LENGTH; |
| } |
| |
| /** {@inheritDoc} */ |
| byte getOrderCode() { |
| return 0x70; |
| } |
| |
| /** {@inheritDoc} */ |
| public void writeToStream(OutputStream os) throws IOException { |
| byte[] data = new byte[14]; |
| data[0] = getOrderCode(); // BEGIN_SEGMENT |
| data[1] = 0x0C; // Length of following parameters |
| |
| // segment name |
| byte[] nameBytes = getNameBytes(); |
| System.arraycopy(nameBytes, 0, data, 2, NAME_LENGTH); |
| |
| data[6] = 0x00; // FLAG1 (ignored) |
| data[7] = APPEND_NEW_SEGMENT; |
| |
| int dataLength = super.getDataLength(); |
| byte[] len = BinaryUtils.convert(dataLength, 2); |
| data[8] = len[0]; // SEGL |
| data[9] = len[1]; |
| |
| // P/S NAME (predecessor name) |
| if (predecessorNameBytes != null) { |
| System.arraycopy(predecessorNameBytes, 0, data, 10, NAME_LENGTH); |
| } |
| os.write(data); |
| |
| writeObjects(objects, os); |
| } |
| |
| /** {@inheritDoc} */ |
| public String toString() { |
| return "GraphicsChainedSegment(name=" + super.getName() + ")"; |
| } |
| } |