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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.modca;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.Set;
import org.apache.fop.afp.AFPConstants;
import org.apache.fop.afp.util.BinaryUtils;
/**
* The Map Page Segment structured field identifies page segments that are required to present
* a page on a physical medium.
*/
public class MapPageSegment extends AbstractAFPObject {
private static final int MAX_SIZE = 127;
/**
* The collection of page segments (maximum of 127 stored as String)
*/
private Set pageSegments = null;
/**
* Constructor for the Map Page Overlay
*/
public MapPageSegment() {
}
private Set getPageSegments() {
if (pageSegments == null) {
this.pageSegments = new java.util.HashSet();
}
return this.pageSegments;
}
/**
* Add a page segment to to the map page segment object.
* @param name the name of the page segment.
* @throws MaximumSizeExceededException if the maximum size is reached
*/
public void addPageSegment(String name) throws MaximumSizeExceededException {
if (getPageSegments().size() > MAX_SIZE) {
throw new MaximumSizeExceededException();
}
if (name.length() > 8) {
throw new IllegalArgumentException("The name of page segment " + name
+ " must not be longer than 8 characters");
}
if (LOG.isDebugEnabled()) {
LOG.debug("addPageSegment():: adding page segment " + name);
}
getPageSegments().add(name);
}
/**
* Indicates whether this object already contains the maximum number of
* page segments.
* @return true if the object is full
*/
public boolean isFull() {
return this.pageSegments.size() >= MAX_SIZE;
}
/** {@inheritDoc} */
public void writeToStream(OutputStream os) throws IOException {
int count = getPageSegments().size();
byte groupLength = 0x0C;
int groupsLength = count * groupLength;
byte[] data = new byte[groupsLength + 12 + 1];
data[0] = 0x5A;
// Set the total record length
byte[] rl1 = BinaryUtils.convert(data.length - 1, 2); //Ignore the
// first byte in
// the length
data[1] = rl1[0];
data[2] = rl1[1];
// Structured field ID for a MPS
data[3] = (byte) 0xD3;
data[4] = Type.MIGRATION;
data[5] = Category.PAGE_SEGMENT;
data[6] = 0x00; // Flags
data[7] = 0x00; // Reserved
data[8] = 0x00; // Reserved
data[9] = groupLength;
data[10] = 0x00; // Reserved
data[11] = 0x00; // Reserved
data[12] = 0x00; // Reserved
int pos = 13;
Iterator iter = this.pageSegments.iterator();
while (iter.hasNext()) {
pos += 4;
String name = (String)iter.next();
try {
byte[] nameBytes = name.getBytes(AFPConstants.EBCIDIC_ENCODING);
System.arraycopy(nameBytes, 0, data, pos, nameBytes.length);
} catch (UnsupportedEncodingException usee) {
LOG.error("UnsupportedEncodingException translating the name "
+ name);
}
pos += 8;
}
os.write(data);
}
}
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