| /* |
| * 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 org.apache.fop.afp.AFPConstants; |
| import org.apache.fop.afp.util.BinaryUtils; |
| |
| /** |
| * The No Operation structured field may be used to carry comments |
| * or any other type of unarchitected data. Although not recommended, |
| * it may also be used to carry semantic data in private or exchange data |
| * streams. However, because receivers of interchange data streams should |
| * ignore the content of No Operation structured fields and because |
| * receiver-generator products are not required to propagate |
| * No Operation structured fields, no semantics should be attached to |
| * the data carried by the No Operation structured field in interchange |
| */ |
| public class NoOperation extends AbstractAFPObject { |
| |
| /** Up to 32759 bytes of data with no architectural definition */ |
| private static final int MAX_DATA_LEN = 32759; |
| |
| /** |
| * Byte representation of the comment |
| */ |
| private String content; |
| |
| /** |
| * Construct a tag logical element with the name and value specified. |
| * |
| * @param content the content to record |
| */ |
| public NoOperation(String content) { |
| this.content = content; |
| } |
| |
| /** |
| * Accessor method to obtain the byte array AFP datastream for the |
| * NoOperation. |
| * |
| * @param os The outputsteam stream |
| * @throws java.io.IOException if an I/O exception occurs during processing |
| */ |
| public void writeToStream(OutputStream os) throws IOException { |
| byte[] contentData = content.getBytes(AFPConstants.EBCIDIC_ENCODING); |
| int contentLen = contentData.length; |
| |
| // packet maximum of 32759 bytes |
| if (contentLen > MAX_DATA_LEN) { |
| contentLen = MAX_DATA_LEN; |
| } |
| |
| byte[] data = new byte[9 + contentLen]; |
| |
| data[0] = 0x5A; |
| |
| // Set the total record length |
| byte[] rl1 = BinaryUtils.convert(8 + contentLen, 2); |
| |
| //Ignore first byte |
| data[1] = rl1[0]; |
| data[2] = rl1[1]; |
| |
| // Structured field ID for a TLE |
| data[3] = (byte) 0xD3; |
| data[4] = (byte) 0xEE; |
| data[5] = (byte) 0xEE; |
| |
| data[6] = 0x00; // Reserved |
| data[7] = 0x00; // Reserved |
| data[8] = 0x00; // Reserved |
| |
| int pos = 9; |
| for (int i = 0; i < contentLen; i++) { |
| data[pos++] = contentData[i]; |
| } |
| os.write(data); |
| } |
| |
| } |