1 files changed, 89 insertions, 0 deletions
diff --git a/java/com/android/dialer/callcomposer/camera/exif/ExifData.java b/java/com/android/dialer/callcomposer/camera/exif/ExifData.java
new file mode 100644
index 000000000..27936ae2f
--- /dev/null
+++ b/java/com/android/dialer/callcomposer/camera/exif/ExifData.java
@@ -0,0 +1,89 @@
+/*
+ * 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;
+
+/**
+ * This class stores the EXIF header in IFDs according to the JPEG specification. It is the result
+ * produced by {@link ExifReader}.
+ *
+ * @see ExifReader
+ * @see IfdData
+ */
+public class ExifData {
+
+  private final IfdData[] mIfdDatas = new IfdData[IfdId.TYPE_IFD_COUNT];
+
+  /**
+   * Adds IFD data. If IFD data of the same type already exists, it will be replaced by the new
+   * data.
+   */
+  void addIfdData(IfdData data) {
+    mIfdDatas[data.getId()] = data;
+  }
+
+  /** Returns the {@link IfdData} object corresponding to a given IFD if it exists or null. */
+  IfdData getIfdData(int ifdId) {
+    if (ExifTag.isValidIfd(ifdId)) {
+      return mIfdDatas[ifdId];
+    }
+    return null;
+  }
+
+  /**
+   * Returns the tag with a given TID in the given IFD if the tag exists. Otherwise returns null.
+   */
+  protected ExifTag getTag(short tag, int ifd) {
+    IfdData ifdData = mIfdDatas[ifd];
+    return (ifdData == null) ? null : ifdData.getTag(tag);
+  }
+
+  /**
+   * Adds the given ExifTag to its default IFD and returns an existing ExifTag with the same TID or
+   * null if none exist.
+   */
+  ExifTag addTag(ExifTag tag) {
+    if (tag != null) {
+      int ifd = tag.getIfd();
+      return addTag(tag, ifd);
+    }
+    return null;
+  }
+
+  /**
+   * Adds the given ExifTag to the given IFD and returns an existing ExifTag with the same TID or
+   * null if none exist.
+   */
+  private ExifTag addTag(ExifTag tag, int ifdId) {
+    if (tag != null && ExifTag.isValidIfd(ifdId)) {
+      IfdData ifdData = getOrCreateIfdData(ifdId);
+      return ifdData.setTag(tag);
+    }
+    return null;
+  }
+
+  /**
+   * Returns the {@link IfdData} object corresponding to a given IFD or generates one if none exist.
+   */
+  private IfdData getOrCreateIfdData(int ifdId) {
+    IfdData ifdData = mIfdDatas[ifdId];
+    if (ifdData == null) {
+      ifdData = new IfdData(ifdId);
+      mIfdDatas[ifdId] = ifdData;
+    }
+    return ifdData;
+  }
+}