1 files changed, 126 insertions, 0 deletions
diff --git a/java/com/android/dialer/callcomposer/camera/exif/IfdData.java b/java/com/android/dialer/callcomposer/camera/exif/IfdData.java
new file mode 100644
index 000000000..b808defc6
--- /dev/null
+++ b/java/com/android/dialer/callcomposer/camera/exif/IfdData.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2016 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.dialer.callcomposer.camera.exif;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * This class stores all the tags in an IFD.
+ *
+ * @see ExifData
+ * @see ExifTag
+ */
+class IfdData {
+
+  private final int mIfdId;
+  private final Map<Short, ExifTag> mExifTags = new HashMap<>();
+  private static final int[] sIfds = {
+    IfdId.TYPE_IFD_0,
+    IfdId.TYPE_IFD_1,
+    IfdId.TYPE_IFD_EXIF,
+    IfdId.TYPE_IFD_INTEROPERABILITY,
+    IfdId.TYPE_IFD_GPS
+  };
+  /**
+   * Creates an IfdData with given IFD ID.
+   *
+   * @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
+   */
+  IfdData(int ifdId) {
+    mIfdId = ifdId;
+  }
+
+  static int[] getIfds() {
+    return sIfds;
+  }
+
+  /** Get a array the contains all {@link ExifTag} in this IFD. */
+  private ExifTag[] getAllTags() {
+    return mExifTags.values().toArray(new ExifTag[mExifTags.size()]);
+  }
+
+  /**
+   * Gets the ID of this IFD.
+   *
+   * @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
+   */
+  protected int getId() {
+    return mIfdId;
+  }
+
+  /** Gets the {@link ExifTag} with given tag id. Return null if there is no such tag. */
+  protected ExifTag getTag(short tagId) {
+    return mExifTags.get(tagId);
+  }
+
+  /** Adds or replaces a {@link ExifTag}. */
+  protected ExifTag setTag(ExifTag tag) {
+    tag.setIfd(mIfdId);
+    return mExifTags.put(tag.getTagId(), tag);
+  }
+
+  /** Gets the tags count in the IFD. */
+  private int getTagCount() {
+    return mExifTags.size();
+  }
+
+  /**
+   * Returns true if all tags in this two IFDs are equal. Note that tags of IFDs offset or thumbnail
+   * offset will be ignored.
+   */
+  @Override
+  public boolean equals(Object obj) {
+    if (this == obj) {
+      return true;
+    }
+    if (obj == null) {
+      return false;
+    }
+    if (obj instanceof IfdData) {
+      IfdData data = (IfdData) obj;
+      if (data.getId() == mIfdId && data.getTagCount() == getTagCount()) {
+        ExifTag[] tags = data.getAllTags();
+        for (ExifTag tag : tags) {
+          if (ExifInterface.isOffsetTag(tag.getTagId())) {
+            continue;
+          }
+          ExifTag tag2 = mExifTags.get(tag.getTagId());
+          if (!tag.equals(tag2)) {
+            return false;
+          }
+        }
+        return true;
+      }
+    }
+    return false;
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mIfdId, mExifTags);
+  }
+}