1 | /*
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2 | * Copyright 2002-2012 Drew Noakes
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | *
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16 | * More information about this project is available at:
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17 | *
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18 | * http://drewnoakes.com/code/exif/
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19 | * http://code.google.com/p/metadata-extractor/
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20 | */
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21 | package com.drew.metadata.jpeg;
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22 |
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23 | import com.drew.lang.BufferBoundsException;
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24 | import com.drew.lang.BufferReader;
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25 | import com.drew.lang.annotations.NotNull;
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26 | import com.drew.metadata.Metadata;
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27 | import com.drew.metadata.MetadataReader;
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28 |
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29 | /**
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30 | * Decodes the comment stored within Jpeg files, populating a <code>Metadata</code> object with tag values in a
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31 | * <code>JpegCommentDirectory</code>.
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32 | *
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33 | * @author Drew Noakes http://drewnoakes.com
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34 | */
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35 | public class JpegCommentReader implements MetadataReader
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36 | {
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37 | /**
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38 | * Performs the Jpeg data extraction, adding found values to the specified
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39 | * instance of <code>Metadata</code>.
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40 | */
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41 | public void extract(@NotNull final BufferReader reader, @NotNull Metadata metadata)
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42 | {
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43 | JpegCommentDirectory directory = metadata.getOrCreateDirectory(JpegCommentDirectory.class);
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44 |
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45 | try {
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46 | directory.setString(JpegCommentDirectory.TAG_JPEG_COMMENT, reader.getString(0, (int)reader.getLength()));
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47 | } catch (BufferBoundsException e) {
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48 | directory.addError("Exception reading JPEG comment string");
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49 | }
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50 | }
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51 | }
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