1 | /*
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2 | * Copyright 2002-2015 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 | * https://drewnoakes.com/code/exif/
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19 | * https://github.com/drewnoakes/metadata-extractor
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20 | */
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21 | package com.drew.metadata;
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22 |
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23 | import com.drew.lang.annotations.NotNull;
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24 |
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25 | /**
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26 | * A default implementation of the abstract TagDescriptor. As this class is not coded with awareness of any metadata
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27 | * tags, it simply reports tag names using the format 'Unknown tag 0x00' (with the corresponding tag number in hex)
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28 | * and gives descriptions using the default string representation of the value.
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29 | *
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30 | * @author Drew Noakes https://drewnoakes.com
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31 | */
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32 | public class DefaultTagDescriptor extends TagDescriptor<Directory>
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33 | {
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34 | public DefaultTagDescriptor(@NotNull Directory directory)
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35 | {
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36 | super(directory);
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37 | }
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38 |
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39 | /**
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40 | * Gets a best-effort tag name using the format 'Unknown tag 0x00' (with the corresponding tag type in hex).
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41 | * @param tagType the tag type identifier.
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42 | * @return a string representation of the tag name.
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43 | */
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44 | @NotNull
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45 | public String getTagName(int tagType)
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46 | {
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47 | String hex = Integer.toHexString(tagType).toUpperCase();
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48 | while (hex.length() < 4) hex = "0" + hex;
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49 | return "Unknown tag 0x" + hex;
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50 | }
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51 | }
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