| /* |
| * 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.List; |
| |
| import org.apache.fop.afp.AFPConstants; |
| import org.apache.fop.afp.util.BinaryUtils; |
| |
| /** |
| * The Map Page Overlay structured field maps a Resource Local ID to the name of |
| * a Begin Overlay structured field. A Map Page Overlay structured field may |
| * contain from one to 254 repeating groups. |
| */ |
| public class MapPageOverlay extends AbstractAFPObject { |
| |
| private static final int MAX_SIZE = 253; |
| |
| /** |
| * The collection of overlays (maximum of 254 stored as byte[]) |
| */ |
| private List overLays; |
| |
| /** |
| * Constructor for the Map Page Overlay |
| */ |
| public MapPageOverlay() { |
| } |
| |
| private List getOverlays() { |
| if (overLays == null) { |
| this.overLays = new java.util.ArrayList(); |
| } |
| return this.overLays; |
| } |
| |
| /** |
| * Add an overlay to to the map page overlay object. |
| * |
| * @param name |
| * The name of the overlay. |
| * @throws MaximumSizeExceededException if the maximum size is reached |
| */ |
| public void addOverlay(String name) throws MaximumSizeExceededException { |
| if (getOverlays().size() > MAX_SIZE) { |
| throw new MaximumSizeExceededException(); |
| } |
| if (name.length() != 8) { |
| throw new IllegalArgumentException("The name of overlay " + name |
| + " must be 8 characters"); |
| } |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("addOverlay():: adding overlay " + name); |
| } |
| try { |
| byte[] data = name.getBytes(AFPConstants.EBCIDIC_ENCODING); |
| getOverlays().add(data); |
| } catch (UnsupportedEncodingException usee) { |
| LOG.error("addOverlay():: UnsupportedEncodingException translating the name " |
| + name); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| public void writeToStream(OutputStream os) throws IOException { |
| int oLayCount = getOverlays().size(); |
| int recordlength = oLayCount * 18; |
| |
| byte[] data = new byte[recordlength + 9]; |
| |
| data[0] = 0x5A; |
| |
| // Set the total record length |
| byte[] rl1 = BinaryUtils.convert(recordlength + 8, 2); //Ignore the |
| // first byte in |
| // the length |
| data[1] = rl1[0]; |
| data[2] = rl1[1]; |
| |
| // Structured field ID for a MPO |
| data[3] = (byte) 0xD3; |
| data[4] = Type.MAP; |
| data[5] = Category.PAGE_OVERLAY; |
| |
| data[6] = 0x00; // Reserved |
| data[7] = 0x00; // Reserved |
| data[8] = 0x00; // Reserved |
| |
| int pos = 8; |
| |
| //For each overlay |
| byte olayref = 0x00; |
| |
| for (int i = 0; i < oLayCount; i++) { |
| olayref = (byte) (olayref + 1); |
| |
| data[++pos] = 0x00; |
| data[++pos] = 0x12; //the length of repeating group |
| |
| data[++pos] = 0x0C; //Fully Qualified Name |
| data[++pos] = 0x02; |
| data[++pos] = (byte) 0x84; |
| data[++pos] = 0x00; |
| |
| //now add the name |
| byte[] name = (byte[]) overLays.get(i); |
| |
| for (byte aName : name) { |
| data[++pos] = aName; |
| } |
| |
| data[++pos] = 0x04; //Resource Local Identifier (RLI) |
| data[++pos] = 0x24; |
| data[++pos] = 0x02; |
| |
| //now add the unique id to the RLI |
| data[++pos] = olayref; |
| } |
| os.write(data); |
| } |
| } |