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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;
-
- /**
- * 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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