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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.render.afp.modca;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.fop.render.afp.DataObjectInfo;
import org.apache.fop.render.afp.modca.triplets.ObjectClassificationTriplet;
import org.apache.fop.render.afp.tools.BinaryUtils;
/**
* Object containers are MO:DCA objects that envelop and carry object data.
*/
public class ObjectContainer extends AbstractNamedAFPObject implements DataObjectAccessor {
/**
* the data object
*/
private AbstractDataObject dataObj = null;
/**
* the object data
*/
private byte[] objectData = null;
/**
* the data object info
*/
private DataObjectInfo dataObjectInfo;
/**
* Main constructor
* @param name the name of this object container
*/
public ObjectContainer(String name) {
super(name);
}
/**
* Sets the data object for this object container
* @param dataObj the data object to reside within this object container
*/
public void setDataObject(AbstractDataObject dataObj) {
this.dataObj = dataObj;
}
/**
* {@inheritDoc}
*/
public AbstractNamedAFPObject getDataObject() {
return this.dataObj;
}
/**
* {@inheritDoc}
*/
public DataObjectInfo getDataObjectInfo() {
return this.dataObjectInfo;
}
/**
* {@inheritDoc}
*/
public void setDataObjectInfo(DataObjectInfo dataObjectInfo) {
this.dataObjectInfo = dataObjectInfo;
Registry registry = Registry.getInstance();
Registry.ObjectType objectType = registry.getObjectType(dataObjectInfo);
if (objectType != null) {
super.setObjectClassification(
ObjectClassificationTriplet.CLASS_TIME_VARIANT_PRESENTATION_OBJECT,
objectType);
} else {
log.warn("no object type for " + dataObjectInfo.getUri());
}
}
/**
* {@inheritDoc}
*/
protected void writeStart(OutputStream os) throws IOException {
super.writeStart(os);
// create object data from data object
ByteArrayOutputStream bos = new ByteArrayOutputStream();
dataObj.write(bos);
this.objectData = bos.toByteArray();
// Set the total record length
byte[] len = BinaryUtils.convert(16 + getTripletDataLength(), 2);
byte[] data = new byte[] {
0x5A, // Structured field identifier
len[0], // Length byte 1
len[1], // Length byte 2
(byte)0xD3, // Structured field id byte 1
(byte)0xA8, // Structured field id byte 2
(byte)0x92, // Structured field id byte 3
0x00, // Flags
0x00, // Reserved
0x00, // Reserved
nameBytes[0],
nameBytes[1],
nameBytes[2],
nameBytes[3],
nameBytes[4],
nameBytes[5],
nameBytes[6],
nameBytes[7]
};
os.write(data);
}
/**
* {@inheritDoc}
*/
protected void writeContent(OutputStream os) throws IOException {
super.writeContent(os);
// write out object data in chunks of object container data
for (int i = 0; i <= objectData.length; i += ObjectContainerData.MAX_DATA_LEN) {
ObjectContainerData objectContainerData = new ObjectContainerData(objectData, i);
objectContainerData.write(os);
}
}
/**
* {@inheritDoc}
*/
protected void writeEnd(OutputStream os) throws IOException {
byte[] data = new byte[] {
0x5A, // Structured field identifier
0x00, // Length byte 1
0x10, // Length byte 2
(byte)0xD3, // Structured field id byte 1
(byte)0xA9, // Structured field id byte 2
(byte)0x92, // Structured field id byte 3
0x00, // Flags
0x00, // Reserved
0x00, // Reserved
nameBytes[0],
nameBytes[1],
nameBytes[2],
nameBytes[3],
nameBytes[4],
nameBytes[5],
nameBytes[6],
nameBytes[7],
};
os.write(data);
}
/**
* An Object Container Data holds a chunk of the data object
*/
private class ObjectContainerData extends AbstractPreparedAFPObject {
/**
* The maximum object container data length
*/
private static final int MAX_DATA_LEN = 32759;
/**
* Main constructor
* @param objData the object data
*/
public ObjectContainerData(byte[] objData, int startIndex) {
int dataLen = MAX_DATA_LEN;
if (startIndex + MAX_DATA_LEN >= objData.length) {
dataLen = objData.length - startIndex - 1;
}
byte[] len = BinaryUtils.convert(8 + dataLen, 2);
byte[] data = new byte[9 + dataLen];
data[0] = 0x5A; // Structured field identifier
data[1] = len[0]; // Length byte 1
data[2] = len[1]; // Length byte 2
data[3] = (byte)0xD3; // Structured field id byte 1
data[4] = (byte)0xEE; // Structured field id byte 2
data[5] = (byte)0x92; // Structured field id byte 3
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
// copy object data chunk
System.arraycopy(data, startIndex, data, 9, dataLen);
super.setData(data);
}
/**
* {@inheritDoc}
*/
public String toString() {
return "ObjectContainerData("
+ (data != null ? "" + (data.length - 2) : "null")
+ ")";
}
}
}
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