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-rw-r--r--WallpaperPicker/src/com/android/gallery3d/exif/ExifTag.java1008
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diff --git a/WallpaperPicker/src/com/android/gallery3d/exif/ExifTag.java b/WallpaperPicker/src/com/android/gallery3d/exif/ExifTag.java
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+++ b/WallpaperPicker/src/com/android/gallery3d/exif/ExifTag.java
@@ -0,0 +1,1008 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed 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 com.android.gallery3d.exif;
+
+import java.nio.charset.Charset;
+import java.text.SimpleDateFormat;
+import java.util.Arrays;
+import java.util.Date;
+
+/**
+ * This class stores information of an EXIF tag. For more information about
+ * defined EXIF tags, please read the Jeita EXIF 2.2 standard. Tags should be
+ * instantiated using {@link ExifInterface#buildTag}.
+ *
+ * @see ExifInterface
+ */
+public class ExifTag {
+ /**
+ * The BYTE type in the EXIF standard. An 8-bit unsigned integer.
+ */
+ public static final short TYPE_UNSIGNED_BYTE = 1;
+ /**
+ * The ASCII type in the EXIF standard. An 8-bit byte containing one 7-bit
+ * ASCII code. The final byte is terminated with NULL.
+ */
+ public static final short TYPE_ASCII = 2;
+ /**
+ * The SHORT type in the EXIF standard. A 16-bit (2-byte) unsigned integer
+ */
+ public static final short TYPE_UNSIGNED_SHORT = 3;
+ /**
+ * The LONG type in the EXIF standard. A 32-bit (4-byte) unsigned integer
+ */
+ public static final short TYPE_UNSIGNED_LONG = 4;
+ /**
+ * The RATIONAL type of EXIF standard. It consists of two LONGs. The first
+ * one is the numerator and the second one expresses the denominator.
+ */
+ public static final short TYPE_UNSIGNED_RATIONAL = 5;
+ /**
+ * The UNDEFINED type in the EXIF standard. An 8-bit byte that can take any
+ * value depending on the field definition.
+ */
+ public static final short TYPE_UNDEFINED = 7;
+ /**
+ * The SLONG type in the EXIF standard. A 32-bit (4-byte) signed integer
+ * (2's complement notation).
+ */
+ public static final short TYPE_LONG = 9;
+ /**
+ * The SRATIONAL type of EXIF standard. It consists of two SLONGs. The first
+ * one is the numerator and the second one is the denominator.
+ */
+ public static final short TYPE_RATIONAL = 10;
+
+ private static Charset US_ASCII = Charset.forName("US-ASCII");
+ private static final int TYPE_TO_SIZE_MAP[] = new int[11];
+ private static final int UNSIGNED_SHORT_MAX = 65535;
+ private static final long UNSIGNED_LONG_MAX = 4294967295L;
+ private static final long LONG_MAX = Integer.MAX_VALUE;
+ private static final long LONG_MIN = Integer.MIN_VALUE;
+
+ static {
+ TYPE_TO_SIZE_MAP[TYPE_UNSIGNED_BYTE] = 1;
+ TYPE_TO_SIZE_MAP[TYPE_ASCII] = 1;
+ TYPE_TO_SIZE_MAP[TYPE_UNSIGNED_SHORT] = 2;
+ TYPE_TO_SIZE_MAP[TYPE_UNSIGNED_LONG] = 4;
+ TYPE_TO_SIZE_MAP[TYPE_UNSIGNED_RATIONAL] = 8;
+ TYPE_TO_SIZE_MAP[TYPE_UNDEFINED] = 1;
+ TYPE_TO_SIZE_MAP[TYPE_LONG] = 4;
+ TYPE_TO_SIZE_MAP[TYPE_RATIONAL] = 8;
+ }
+
+ static final int SIZE_UNDEFINED = 0;
+
+ // Exif TagId
+ private final short mTagId;
+ // Exif Tag Type
+ private final short mDataType;
+ // If tag has defined count
+ private boolean mHasDefinedDefaultComponentCount;
+ // Actual data count in tag (should be number of elements in value array)
+ private int mComponentCountActual;
+ // The ifd that this tag should be put in
+ private int mIfd;
+ // The value (array of elements of type Tag Type)
+ private Object mValue;
+ // Value offset in exif header.
+ private int mOffset;
+
+ private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("yyyy:MM:dd kk:mm:ss");
+
+ /**
+ * Returns true if the given IFD is a valid IFD.
+ */
+ public static boolean isValidIfd(int ifdId) {
+ return ifdId == IfdId.TYPE_IFD_0 || ifdId == IfdId.TYPE_IFD_1
+ || ifdId == IfdId.TYPE_IFD_EXIF || ifdId == IfdId.TYPE_IFD_INTEROPERABILITY
+ || ifdId == IfdId.TYPE_IFD_GPS;
+ }
+
+ /**
+ * Returns true if a given type is a valid tag type.
+ */
+ public static boolean isValidType(short type) {
+ return type == TYPE_UNSIGNED_BYTE || type == TYPE_ASCII ||
+ type == TYPE_UNSIGNED_SHORT || type == TYPE_UNSIGNED_LONG ||
+ type == TYPE_UNSIGNED_RATIONAL || type == TYPE_UNDEFINED ||
+ type == TYPE_LONG || type == TYPE_RATIONAL;
+ }
+
+ // Use builtTag in ExifInterface instead of constructor.
+ ExifTag(short tagId, short type, int componentCount, int ifd,
+ boolean hasDefinedComponentCount) {
+ mTagId = tagId;
+ mDataType = type;
+ mComponentCountActual = componentCount;
+ mHasDefinedDefaultComponentCount = hasDefinedComponentCount;
+ mIfd = ifd;
+ mValue = null;
+ }
+
+ /**
+ * Gets the element size of the given data type in bytes.
+ *
+ * @see #TYPE_ASCII
+ * @see #TYPE_LONG
+ * @see #TYPE_RATIONAL
+ * @see #TYPE_UNDEFINED
+ * @see #TYPE_UNSIGNED_BYTE
+ * @see #TYPE_UNSIGNED_LONG
+ * @see #TYPE_UNSIGNED_RATIONAL
+ * @see #TYPE_UNSIGNED_SHORT
+ */
+ public static int getElementSize(short type) {
+ return TYPE_TO_SIZE_MAP[type];
+ }
+
+ /**
+ * Returns the ID of the IFD this tag belongs to.
+ *
+ * @see IfdId#TYPE_IFD_0
+ * @see IfdId#TYPE_IFD_1
+ * @see IfdId#TYPE_IFD_EXIF
+ * @see IfdId#TYPE_IFD_GPS
+ * @see IfdId#TYPE_IFD_INTEROPERABILITY
+ */
+ public int getIfd() {
+ return mIfd;
+ }
+
+ protected void setIfd(int ifdId) {
+ mIfd = ifdId;
+ }
+
+ /**
+ * Gets the TID of this tag.
+ */
+ public short getTagId() {
+ return mTagId;
+ }
+
+ /**
+ * Gets the data type of this tag
+ *
+ * @see #TYPE_ASCII
+ * @see #TYPE_LONG
+ * @see #TYPE_RATIONAL
+ * @see #TYPE_UNDEFINED
+ * @see #TYPE_UNSIGNED_BYTE
+ * @see #TYPE_UNSIGNED_LONG
+ * @see #TYPE_UNSIGNED_RATIONAL
+ * @see #TYPE_UNSIGNED_SHORT
+ */
+ public short getDataType() {
+ return mDataType;
+ }
+
+ /**
+ * Gets the total data size in bytes of the value of this tag.
+ */
+ public int getDataSize() {
+ return getComponentCount() * getElementSize(getDataType());
+ }
+
+ /**
+ * Gets the component count of this tag.
+ */
+
+ // TODO: fix integer overflows with this
+ public int getComponentCount() {
+ return mComponentCountActual;
+ }
+
+ /**
+ * Sets the component count of this tag. Call this function before
+ * setValue() if the length of value does not match the component count.
+ */
+ protected void forceSetComponentCount(int count) {
+ mComponentCountActual = count;
+ }
+
+ /**
+ * Returns true if this ExifTag contains value; otherwise, this tag will
+ * contain an offset value that is determined when the tag is written.
+ */
+ public boolean hasValue() {
+ return mValue != null;
+ }
+
+ /**
+ * Sets integer values into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_SHORT}. This method will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_SHORT},
+ * {@link #TYPE_UNSIGNED_LONG}, or {@link #TYPE_LONG}.</li>
+ * <li>The value overflows.</li>
+ * <li>The value.length does NOT match the component count in the definition
+ * for this tag.</li>
+ * </ul>
+ */
+ public boolean setValue(int[] value) {
+ if (checkBadComponentCount(value.length)) {
+ return false;
+ }
+ if (mDataType != TYPE_UNSIGNED_SHORT && mDataType != TYPE_LONG &&
+ mDataType != TYPE_UNSIGNED_LONG) {
+ return false;
+ }
+ if (mDataType == TYPE_UNSIGNED_SHORT && checkOverflowForUnsignedShort(value)) {
+ return false;
+ } else if (mDataType == TYPE_UNSIGNED_LONG && checkOverflowForUnsignedLong(value)) {
+ return false;
+ }
+
+ long[] data = new long[value.length];
+ for (int i = 0; i < value.length; i++) {
+ data[i] = value[i];
+ }
+ mValue = data;
+ mComponentCountActual = value.length;
+ return true;
+ }
+
+ /**
+ * Sets integer value into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_SHORT}, or {@link #TYPE_LONG}. This method
+ * will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_SHORT},
+ * {@link #TYPE_UNSIGNED_LONG}, or {@link #TYPE_LONG}.</li>
+ * <li>The value overflows.</li>
+ * <li>The component count in the definition of this tag is not 1.</li>
+ * </ul>
+ */
+ public boolean setValue(int value) {
+ return setValue(new int[] {
+ value
+ });
+ }
+
+ /**
+ * Sets long values into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_LONG}. This method will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_LONG}.</li>
+ * <li>The value overflows.</li>
+ * <li>The value.length does NOT match the component count in the definition
+ * for this tag.</li>
+ * </ul>
+ */
+ public boolean setValue(long[] value) {
+ if (checkBadComponentCount(value.length) || mDataType != TYPE_UNSIGNED_LONG) {
+ return false;
+ }
+ if (checkOverflowForUnsignedLong(value)) {
+ return false;
+ }
+ mValue = value;
+ mComponentCountActual = value.length;
+ return true;
+ }
+
+ /**
+ * Sets long values into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_LONG}. This method will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_LONG}.</li>
+ * <li>The value overflows.</li>
+ * <li>The component count in the definition for this tag is not 1.</li>
+ * </ul>
+ */
+ public boolean setValue(long value) {
+ return setValue(new long[] {
+ value
+ });
+ }
+
+ /**
+ * Sets a string value into this tag. This method should be used for tags of
+ * type {@link #TYPE_ASCII}. The string is converted to an ASCII string.
+ * Characters that cannot be converted are replaced with '?'. The length of
+ * the string must be equal to either (component count -1) or (component
+ * count). The final byte will be set to the string null terminator '\0',
+ * overwriting the last character in the string if the value.length is equal
+ * to the component count. This method will fail if:
+ * <ul>
+ * <li>The data type is not {@link #TYPE_ASCII} or {@link #TYPE_UNDEFINED}.</li>
+ * <li>The length of the string is not equal to (component count -1) or
+ * (component count) in the definition for this tag.</li>
+ * </ul>
+ */
+ public boolean setValue(String value) {
+ if (mDataType != TYPE_ASCII && mDataType != TYPE_UNDEFINED) {
+ return false;
+ }
+
+ byte[] buf = value.getBytes(US_ASCII);
+ byte[] finalBuf = buf;
+ if (buf.length > 0) {
+ finalBuf = (buf[buf.length - 1] == 0 || mDataType == TYPE_UNDEFINED) ? buf : Arrays
+ .copyOf(buf, buf.length + 1);
+ } else if (mDataType == TYPE_ASCII && mComponentCountActual == 1) {
+ finalBuf = new byte[] { 0 };
+ }
+ int count = finalBuf.length;
+ if (checkBadComponentCount(count)) {
+ return false;
+ }
+ mComponentCountActual = count;
+ mValue = finalBuf;
+ return true;
+ }
+
+ /**
+ * Sets Rational values into this tag. This method should be used for tags
+ * of type {@link #TYPE_UNSIGNED_RATIONAL}, or {@link #TYPE_RATIONAL}. This
+ * method will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_RATIONAL}
+ * or {@link #TYPE_RATIONAL}.</li>
+ * <li>The value overflows.</li>
+ * <li>The value.length does NOT match the component count in the definition
+ * for this tag.</li>
+ * </ul>
+ *
+ * @see Rational
+ */
+ public boolean setValue(Rational[] value) {
+ if (checkBadComponentCount(value.length)) {
+ return false;
+ }
+ if (mDataType != TYPE_UNSIGNED_RATIONAL && mDataType != TYPE_RATIONAL) {
+ return false;
+ }
+ if (mDataType == TYPE_UNSIGNED_RATIONAL && checkOverflowForUnsignedRational(value)) {
+ return false;
+ } else if (mDataType == TYPE_RATIONAL && checkOverflowForRational(value)) {
+ return false;
+ }
+
+ mValue = value;
+ mComponentCountActual = value.length;
+ return true;
+ }
+
+ /**
+ * Sets a Rational value into this tag. This method should be used for tags
+ * of type {@link #TYPE_UNSIGNED_RATIONAL}, or {@link #TYPE_RATIONAL}. This
+ * method will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_RATIONAL}
+ * or {@link #TYPE_RATIONAL}.</li>
+ * <li>The value overflows.</li>
+ * <li>The component count in the definition for this tag is not 1.</li>
+ * </ul>
+ *
+ * @see Rational
+ */
+ public boolean setValue(Rational value) {
+ return setValue(new Rational[] {
+ value
+ });
+ }
+
+ /**
+ * Sets byte values into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_BYTE} or {@link #TYPE_UNDEFINED}. This method
+ * will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_BYTE} or
+ * {@link #TYPE_UNDEFINED} .</li>
+ * <li>The length does NOT match the component count in the definition for
+ * this tag.</li>
+ * </ul>
+ */
+ public boolean setValue(byte[] value, int offset, int length) {
+ if (checkBadComponentCount(length)) {
+ return false;
+ }
+ if (mDataType != TYPE_UNSIGNED_BYTE && mDataType != TYPE_UNDEFINED) {
+ return false;
+ }
+ mValue = new byte[length];
+ System.arraycopy(value, offset, mValue, 0, length);
+ mComponentCountActual = length;
+ return true;
+ }
+
+ /**
+ * Equivalent to setValue(value, 0, value.length).
+ */
+ public boolean setValue(byte[] value) {
+ return setValue(value, 0, value.length);
+ }
+
+ /**
+ * Sets byte value into this tag. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_BYTE} or {@link #TYPE_UNDEFINED}. This method
+ * will fail if:
+ * <ul>
+ * <li>The component type of this tag is not {@link #TYPE_UNSIGNED_BYTE} or
+ * {@link #TYPE_UNDEFINED} .</li>
+ * <li>The component count in the definition for this tag is not 1.</li>
+ * </ul>
+ */
+ public boolean setValue(byte value) {
+ return setValue(new byte[] {
+ value
+ });
+ }
+
+ /**
+ * Sets the value for this tag using an appropriate setValue method for the
+ * given object. This method will fail if:
+ * <ul>
+ * <li>The corresponding setValue method for the class of the object passed
+ * in would fail.</li>
+ * <li>There is no obvious way to cast the object passed in into an EXIF tag
+ * type.</li>
+ * </ul>
+ */
+ public boolean setValue(Object obj) {
+ if (obj == null) {
+ return false;
+ } else if (obj instanceof Short) {
+ return setValue(((Short) obj).shortValue() & 0x0ffff);
+ } else if (obj instanceof String) {
+ return setValue((String) obj);
+ } else if (obj instanceof int[]) {
+ return setValue((int[]) obj);
+ } else if (obj instanceof long[]) {
+ return setValue((long[]) obj);
+ } else if (obj instanceof Rational) {
+ return setValue((Rational) obj);
+ } else if (obj instanceof Rational[]) {
+ return setValue((Rational[]) obj);
+ } else if (obj instanceof byte[]) {
+ return setValue((byte[]) obj);
+ } else if (obj instanceof Integer) {
+ return setValue(((Integer) obj).intValue());
+ } else if (obj instanceof Long) {
+ return setValue(((Long) obj).longValue());
+ } else if (obj instanceof Byte) {
+ return setValue(((Byte) obj).byteValue());
+ } else if (obj instanceof Short[]) {
+ // Nulls in this array are treated as zeroes.
+ Short[] arr = (Short[]) obj;
+ int[] fin = new int[arr.length];
+ for (int i = 0; i < arr.length; i++) {
+ fin[i] = (arr[i] == null) ? 0 : arr[i].shortValue() & 0x0ffff;
+ }
+ return setValue(fin);
+ } else if (obj instanceof Integer[]) {
+ // Nulls in this array are treated as zeroes.
+ Integer[] arr = (Integer[]) obj;
+ int[] fin = new int[arr.length];
+ for (int i = 0; i < arr.length; i++) {
+ fin[i] = (arr[i] == null) ? 0 : arr[i].intValue();
+ }
+ return setValue(fin);
+ } else if (obj instanceof Long[]) {
+ // Nulls in this array are treated as zeroes.
+ Long[] arr = (Long[]) obj;
+ long[] fin = new long[arr.length];
+ for (int i = 0; i < arr.length; i++) {
+ fin[i] = (arr[i] == null) ? 0 : arr[i].longValue();
+ }
+ return setValue(fin);
+ } else if (obj instanceof Byte[]) {
+ // Nulls in this array are treated as zeroes.
+ Byte[] arr = (Byte[]) obj;
+ byte[] fin = new byte[arr.length];
+ for (int i = 0; i < arr.length; i++) {
+ fin[i] = (arr[i] == null) ? 0 : arr[i].byteValue();
+ }
+ return setValue(fin);
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Sets a timestamp to this tag. The method converts the timestamp with the
+ * format of "yyyy:MM:dd kk:mm:ss" and calls {@link #setValue(String)}. This
+ * method will fail if the data type is not {@link #TYPE_ASCII} or the
+ * component count of this tag is not 20 or undefined.
+ *
+ * @param time the number of milliseconds since Jan. 1, 1970 GMT
+ * @return true on success
+ */
+ public boolean setTimeValue(long time) {
+ // synchronized on TIME_FORMAT as SimpleDateFormat is not thread safe
+ synchronized (TIME_FORMAT) {
+ return setValue(TIME_FORMAT.format(new Date(time)));
+ }
+ }
+
+ /**
+ * Gets the value as a String. This method should be used for tags of type
+ * {@link #TYPE_ASCII}.
+ *
+ * @return the value as a String, or null if the tag's value does not exist
+ * or cannot be converted to a String.
+ */
+ public String getValueAsString() {
+ if (mValue == null) {
+ return null;
+ } else if (mValue instanceof String) {
+ return (String) mValue;
+ } else if (mValue instanceof byte[]) {
+ return new String((byte[]) mValue, US_ASCII);
+ }
+ return null;
+ }
+
+ /**
+ * Gets the value as a String. This method should be used for tags of type
+ * {@link #TYPE_ASCII}.
+ *
+ * @param defaultValue the String to return if the tag's value does not
+ * exist or cannot be converted to a String.
+ * @return the tag's value as a String, or the defaultValue.
+ */
+ public String getValueAsString(String defaultValue) {
+ String s = getValueAsString();
+ if (s == null) {
+ return defaultValue;
+ }
+ return s;
+ }
+
+ /**
+ * Gets the value as a byte array. This method should be used for tags of
+ * type {@link #TYPE_UNDEFINED} or {@link #TYPE_UNSIGNED_BYTE}.
+ *
+ * @return the value as a byte array, or null if the tag's value does not
+ * exist or cannot be converted to a byte array.
+ */
+ public byte[] getValueAsBytes() {
+ if (mValue instanceof byte[]) {
+ return (byte[]) mValue;
+ }
+ return null;
+ }
+
+ /**
+ * Gets the value as a byte. If there are more than 1 bytes in this value,
+ * gets the first byte. This method should be used for tags of type
+ * {@link #TYPE_UNDEFINED} or {@link #TYPE_UNSIGNED_BYTE}.
+ *
+ * @param defaultValue the byte to return if tag's value does not exist or
+ * cannot be converted to a byte.
+ * @return the tag's value as a byte, or the defaultValue.
+ */
+ public byte getValueAsByte(byte defaultValue) {
+ byte[] b = getValueAsBytes();
+ if (b == null || b.length < 1) {
+ return defaultValue;
+ }
+ return b[0];
+ }
+
+ /**
+ * Gets the value as an array of Rationals. This method should be used for
+ * tags of type {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}.
+ *
+ * @return the value as as an array of Rationals, or null if the tag's value
+ * does not exist or cannot be converted to an array of Rationals.
+ */
+ public Rational[] getValueAsRationals() {
+ if (mValue instanceof Rational[]) {
+ return (Rational[]) mValue;
+ }
+ return null;
+ }
+
+ /**
+ * Gets the value as a Rational. If there are more than 1 Rationals in this
+ * value, gets the first one. This method should be used for tags of type
+ * {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}.
+ *
+ * @param defaultValue the Rational to return if tag's value does not exist
+ * or cannot be converted to a Rational.
+ * @return the tag's value as a Rational, or the defaultValue.
+ */
+ public Rational getValueAsRational(Rational defaultValue) {
+ Rational[] r = getValueAsRationals();
+ if (r == null || r.length < 1) {
+ return defaultValue;
+ }
+ return r[0];
+ }
+
+ /**
+ * Gets the value as a Rational. If there are more than 1 Rationals in this
+ * value, gets the first one. This method should be used for tags of type
+ * {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}.
+ *
+ * @param defaultValue the numerator of the Rational to return if tag's
+ * value does not exist or cannot be converted to a Rational (the
+ * denominator will be 1).
+ * @return the tag's value as a Rational, or the defaultValue.
+ */
+ public Rational getValueAsRational(long defaultValue) {
+ Rational defaultVal = new Rational(defaultValue, 1);
+ return getValueAsRational(defaultVal);
+ }
+
+ /**
+ * Gets the value as an array of ints. This method should be used for tags
+ * of type {@link #TYPE_UNSIGNED_SHORT}, {@link #TYPE_UNSIGNED_LONG}.
+ *
+ * @return the value as as an array of ints, or null if the tag's value does
+ * not exist or cannot be converted to an array of ints.
+ */
+ public int[] getValueAsInts() {
+ if (mValue == null) {
+ return null;
+ } else if (mValue instanceof long[]) {
+ long[] val = (long[]) mValue;
+ int[] arr = new int[val.length];
+ for (int i = 0; i < val.length; i++) {
+ arr[i] = (int) val[i]; // Truncates
+ }
+ return arr;
+ }
+ return null;
+ }
+
+ /**
+ * Gets the value as an int. If there are more than 1 ints in this value,
+ * gets the first one. This method should be used for tags of type
+ * {@link #TYPE_UNSIGNED_SHORT}, {@link #TYPE_UNSIGNED_LONG}.
+ *
+ * @param defaultValue the int to return if tag's value does not exist or
+ * cannot be converted to an int.
+ * @return the tag's value as a int, or the defaultValue.
+ */
+ public int getValueAsInt(int defaultValue) {
+ int[] i = getValueAsInts();
+ if (i == null || i.length < 1) {
+ return defaultValue;
+ }
+ return i[0];
+ }
+
+ /**
+ * Gets the value as an array of longs. This method should be used for tags
+ * of type {@link #TYPE_UNSIGNED_LONG}.
+ *
+ * @return the value as as an array of longs, or null if the tag's value
+ * does not exist or cannot be converted to an array of longs.
+ */
+ public long[] getValueAsLongs() {
+ if (mValue instanceof long[]) {
+ return (long[]) mValue;
+ }
+ return null;
+ }
+
+ /**
+ * Gets the value or null if none exists. If there are more than 1 longs in
+ * this value, gets the first one. This method should be used for tags of
+ * type {@link #TYPE_UNSIGNED_LONG}.
+ *
+ * @param defaultValue the long to return if tag's value does not exist or
+ * cannot be converted to a long.
+ * @return the tag's value as a long, or the defaultValue.
+ */
+ public long getValueAsLong(long defaultValue) {
+ long[] l = getValueAsLongs();
+ if (l == null || l.length < 1) {
+ return defaultValue;
+ }
+ return l[0];
+ }
+
+ /**
+ * Gets the tag's value or null if none exists.
+ */
+ public Object getValue() {
+ return mValue;
+ }
+
+ /**
+ * Gets a long representation of the value.
+ *
+ * @param defaultValue value to return if there is no value or value is a
+ * rational with a denominator of 0.
+ * @return the tag's value as a long, or defaultValue if no representation
+ * exists.
+ */
+ public long forceGetValueAsLong(long defaultValue) {
+ long[] l = getValueAsLongs();
+ if (l != null && l.length >= 1) {
+ return l[0];
+ }
+ byte[] b = getValueAsBytes();
+ if (b != null && b.length >= 1) {
+ return b[0];
+ }
+ Rational[] r = getValueAsRationals();
+ if (r != null && r.length >= 1 && r[0].getDenominator() != 0) {
+ return (long) r[0].toDouble();
+ }
+ return defaultValue;
+ }
+
+ /**
+ * Gets a string representation of the value.
+ */
+ public String forceGetValueAsString() {
+ if (mValue == null) {
+ return "";
+ } else if (mValue instanceof byte[]) {
+ if (mDataType == TYPE_ASCII) {
+ return new String((byte[]) mValue, US_ASCII);
+ } else {
+ return Arrays.toString((byte[]) mValue);
+ }
+ } else if (mValue instanceof long[]) {
+ if (((long[]) mValue).length == 1) {
+ return String.valueOf(((long[]) mValue)[0]);
+ } else {
+ return Arrays.toString((long[]) mValue);
+ }
+ } else if (mValue instanceof Object[]) {
+ if (((Object[]) mValue).length == 1) {
+ Object val = ((Object[]) mValue)[0];
+ if (val == null) {
+ return "";
+ } else {
+ return val.toString();
+ }
+ } else {
+ return Arrays.toString((Object[]) mValue);
+ }
+ } else {
+ return mValue.toString();
+ }
+ }
+
+ /**
+ * Gets the value for type {@link #TYPE_ASCII}, {@link #TYPE_LONG},
+ * {@link #TYPE_UNDEFINED}, {@link #TYPE_UNSIGNED_BYTE},
+ * {@link #TYPE_UNSIGNED_LONG}, or {@link #TYPE_UNSIGNED_SHORT}. For
+ * {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}, call
+ * {@link #getRational(int)} instead.
+ *
+ * @exception IllegalArgumentException if the data type is
+ * {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}.
+ */
+ protected long getValueAt(int index) {
+ if (mValue instanceof long[]) {
+ return ((long[]) mValue)[index];
+ } else if (mValue instanceof byte[]) {
+ return ((byte[]) mValue)[index];
+ }
+ throw new IllegalArgumentException("Cannot get integer value from "
+ + convertTypeToString(mDataType));
+ }
+
+ /**
+ * Gets the {@link #TYPE_ASCII} data.
+ *
+ * @exception IllegalArgumentException If the type is NOT
+ * {@link #TYPE_ASCII}.
+ */
+ protected String getString() {
+ if (mDataType != TYPE_ASCII) {
+ throw new IllegalArgumentException("Cannot get ASCII value from "
+ + convertTypeToString(mDataType));
+ }
+ return new String((byte[]) mValue, US_ASCII);
+ }
+
+ /*
+ * Get the converted ascii byte. Used by ExifOutputStream.
+ */
+ protected byte[] getStringByte() {
+ return (byte[]) mValue;
+ }
+
+ /**
+ * Gets the {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL} data.
+ *
+ * @exception IllegalArgumentException If the type is NOT
+ * {@link #TYPE_RATIONAL} or {@link #TYPE_UNSIGNED_RATIONAL}.
+ */
+ protected Rational getRational(int index) {
+ if ((mDataType != TYPE_RATIONAL) && (mDataType != TYPE_UNSIGNED_RATIONAL)) {
+ throw new IllegalArgumentException("Cannot get RATIONAL value from "
+ + convertTypeToString(mDataType));
+ }
+ return ((Rational[]) mValue)[index];
+ }
+
+ /**
+ * Equivalent to getBytes(buffer, 0, buffer.length).
+ */
+ protected void getBytes(byte[] buf) {
+ getBytes(buf, 0, buf.length);
+ }
+
+ /**
+ * Gets the {@link #TYPE_UNDEFINED} or {@link #TYPE_UNSIGNED_BYTE} data.
+ *
+ * @param buf the byte array in which to store the bytes read.
+ * @param offset the initial position in buffer to store the bytes.
+ * @param length the maximum number of bytes to store in buffer. If length >
+ * component count, only the valid bytes will be stored.
+ * @exception IllegalArgumentException If the type is NOT
+ * {@link #TYPE_UNDEFINED} or {@link #TYPE_UNSIGNED_BYTE}.
+ */
+ protected void getBytes(byte[] buf, int offset, int length) {
+ if ((mDataType != TYPE_UNDEFINED) && (mDataType != TYPE_UNSIGNED_BYTE)) {
+ throw new IllegalArgumentException("Cannot get BYTE value from "
+ + convertTypeToString(mDataType));
+ }
+ System.arraycopy(mValue, 0, buf, offset,
+ (length > mComponentCountActual) ? mComponentCountActual : length);
+ }
+
+ /**
+ * Gets the offset of this tag. This is only valid if this data size > 4 and
+ * contains an offset to the location of the actual value.
+ */
+ protected int getOffset() {
+ return mOffset;
+ }
+
+ /**
+ * Sets the offset of this tag.
+ */
+ protected void setOffset(int offset) {
+ mOffset = offset;
+ }
+
+ protected void setHasDefinedCount(boolean d) {
+ mHasDefinedDefaultComponentCount = d;
+ }
+
+ protected boolean hasDefinedCount() {
+ return mHasDefinedDefaultComponentCount;
+ }
+
+ private boolean checkBadComponentCount(int count) {
+ if (mHasDefinedDefaultComponentCount && (mComponentCountActual != count)) {
+ return true;
+ }
+ return false;
+ }
+
+ private static String convertTypeToString(short type) {
+ switch (type) {
+ case TYPE_UNSIGNED_BYTE:
+ return "UNSIGNED_BYTE";
+ case TYPE_ASCII:
+ return "ASCII";
+ case TYPE_UNSIGNED_SHORT:
+ return "UNSIGNED_SHORT";
+ case TYPE_UNSIGNED_LONG:
+ return "UNSIGNED_LONG";
+ case TYPE_UNSIGNED_RATIONAL:
+ return "UNSIGNED_RATIONAL";
+ case TYPE_UNDEFINED:
+ return "UNDEFINED";
+ case TYPE_LONG:
+ return "LONG";
+ case TYPE_RATIONAL:
+ return "RATIONAL";
+ default:
+ return "";
+ }
+ }
+
+ private boolean checkOverflowForUnsignedShort(int[] value) {
+ for (int v : value) {
+ if (v > UNSIGNED_SHORT_MAX || v < 0) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private boolean checkOverflowForUnsignedLong(long[] value) {
+ for (long v : value) {
+ if (v < 0 || v > UNSIGNED_LONG_MAX) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private boolean checkOverflowForUnsignedLong(int[] value) {
+ for (int v : value) {
+ if (v < 0) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private boolean checkOverflowForUnsignedRational(Rational[] value) {
+ for (Rational v : value) {
+ if (v.getNumerator() < 0 || v.getDenominator() < 0
+ || v.getNumerator() > UNSIGNED_LONG_MAX
+ || v.getDenominator() > UNSIGNED_LONG_MAX) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private boolean checkOverflowForRational(Rational[] value) {
+ for (Rational v : value) {
+ if (v.getNumerator() < LONG_MIN || v.getDenominator() < LONG_MIN
+ || v.getNumerator() > LONG_MAX
+ || v.getDenominator() > LONG_MAX) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == null) {
+ return false;
+ }
+ if (obj instanceof ExifTag) {
+ ExifTag tag = (ExifTag) obj;
+ if (tag.mTagId != this.mTagId
+ || tag.mComponentCountActual != this.mComponentCountActual
+ || tag.mDataType != this.mDataType) {
+ return false;
+ }
+ if (mValue != null) {
+ if (tag.mValue == null) {
+ return false;
+ } else if (mValue instanceof long[]) {
+ if (!(tag.mValue instanceof long[])) {
+ return false;
+ }
+ return Arrays.equals((long[]) mValue, (long[]) tag.mValue);
+ } else if (mValue instanceof Rational[]) {
+ if (!(tag.mValue instanceof Rational[])) {
+ return false;
+ }
+ return Arrays.equals((Rational[]) mValue, (Rational[]) tag.mValue);
+ } else if (mValue instanceof byte[]) {
+ if (!(tag.mValue instanceof byte[])) {
+ return false;
+ }
+ return Arrays.equals((byte[]) mValue, (byte[]) tag.mValue);
+ } else {
+ return mValue.equals(tag.mValue);
+ }
+ } else {
+ return tag.mValue == null;
+ }
+ }
+ return false;
+ }
+
+ @Override
+ public String toString() {
+ return String.format("tag id: %04X\n", mTagId) + "ifd id: " + mIfd + "\ntype: "
+ + convertTypeToString(mDataType) + "\ncount: " + mComponentCountActual
+ + "\noffset: " + mOffset + "\nvalue: " + forceGetValueAsString() + "\n";
+ }
+
+}