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/*
* 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() + ")";
}
}
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