| /* |
| * 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. |
| */ |
| package org.apache.commons.imaging.formats.tiff.fieldtypes; |
| |
| import java.io.UnsupportedEncodingException; |
| |
| import org.apache.commons.imaging.ImageWriteException; |
| import org.apache.commons.imaging.formats.tiff.TiffField; |
| |
| public class FieldTypeAscii extends FieldType |
| { |
| public FieldTypeAscii(int type, String name) |
| { |
| super(type, 1, name); |
| } |
| |
| @Override |
| public Object getSimpleValue(TiffField entry) { |
| // According to EXIF specification "2 = ASCII An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL." |
| byte bytes[] = getRawBytes(entry); |
| int nullCount = 1; |
| for (int i = 0; i < bytes.length - 1; i++) { |
| if (bytes[i] == 0) { |
| nullCount++; |
| } |
| } |
| String[] strings = new String[nullCount]; |
| int stringsAdded = 0; |
| strings[0] = ""; // if we have a 0 length string |
| int nextStringPos = 0; |
| // According to the Exiftool FAQ, http://www.metadataworkinggroup.org |
| // specifies that the TIFF ASCII fields are actually UTF-8. |
| // Exiftool however allows you to configure the charset used. |
| for (int i = 0; i < bytes.length; i++) { |
| if (bytes[i] == 0) { |
| try { |
| String string = new String(bytes, nextStringPos, i - nextStringPos, "UTF-8"); |
| strings[stringsAdded++] = string; |
| } catch (UnsupportedEncodingException unsupportedEncoding) { |
| } |
| nextStringPos = i + 1; |
| } |
| } |
| if (nextStringPos < bytes.length) { |
| // Buggy file, string wasn't null terminated |
| try { |
| String string = new String(bytes, nextStringPos, bytes.length - nextStringPos, "UTF-8"); |
| strings[stringsAdded++] = string; |
| } catch (UnsupportedEncodingException unsupportedEncoding) { |
| } |
| } |
| if (strings.length == 1) { |
| return strings[0]; |
| } else { |
| return strings; |
| } |
| } |
| |
| @Override |
| public byte[] writeData(Object o, int byteOrder) throws ImageWriteException |
| { |
| if (o instanceof byte[]) { |
| byte bytes[] = (byte[]) o; |
| byte result[] = new byte[bytes.length + 1]; |
| System.arraycopy(bytes, 0, result, 0, bytes.length); |
| result[result.length - 1] = 0; |
| return result; |
| } else if (o instanceof String) { |
| byte[] bytes = null; |
| try { |
| bytes = ((String) o).getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException cannotHappen) { |
| } |
| byte result[] = new byte[bytes.length + 1]; |
| System.arraycopy(bytes, 0, result, 0, bytes.length); |
| result[result.length - 1] = 0; |
| return result; |
| } else if (o instanceof String[]) { |
| String[] strings = (String[])o; |
| int totalLength = 0; |
| for (int i = 0; i < strings.length; i++) { |
| byte[] bytes = null; |
| try { |
| bytes = strings[i].getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException cannotHappen) { |
| } |
| totalLength += (bytes.length + 1); |
| } |
| byte[] result = new byte[totalLength]; |
| int position = 0; |
| for (int i = 0; i < strings.length; i++) { |
| byte[] bytes = null; |
| try { |
| bytes = strings[i].getBytes("UTF-8"); |
| } catch (UnsupportedEncodingException cannotHappen) { |
| } |
| System.arraycopy(bytes, 0, result, position, bytes.length); |
| position += (bytes.length + 1); |
| } |
| return result; |
| } |
| else |
| throw new ImageWriteException("Unknown data type: " + o); |
| } |
| |
| } |