| /* |
| * 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.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; |
| |
| for (Object pageSegment : this.pageSegments) { |
| pos += 4; |
| |
| String name = (String) pageSegment; |
| 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); |
| } |
| } |