1 files changed, 131 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/XmlPullParserUtil.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/XmlPullParserUtil.java
new file mode 100644
index 0000000000..7b56886dba
--- /dev/null
+++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/util/XmlPullParserUtil.java
@@ -0,0 +1,131 @@
+/*
+ * 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 org.mozilla.thirdparty.com.google.android.exoplayer2.util;
+
+import androidx.annotation.Nullable;
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+/**
+ * {@link XmlPullParser} utility methods.
+ */
+public final class XmlPullParserUtil {
+
+  private XmlPullParserUtil() {}
+
+  /**
+   * Returns whether the current event is an end tag with the specified name.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @param name The specified name.
+   * @return Whether the current event is an end tag with the specified name.
+   * @throws XmlPullParserException If an error occurs querying the parser.
+   */
+  public static boolean isEndTag(XmlPullParser xpp, String name) throws XmlPullParserException {
+    return isEndTag(xpp) && xpp.getName().equals(name);
+  }
+
+  /**
+   * Returns whether the current event is an end tag.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @return Whether the current event is an end tag.
+   * @throws XmlPullParserException If an error occurs querying the parser.
+   */
+  public static boolean isEndTag(XmlPullParser xpp) throws XmlPullParserException {
+    return xpp.getEventType() == XmlPullParser.END_TAG;
+  }
+
+  /**
+   * Returns whether the current event is a start tag with the specified name.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @param name The specified name.
+   * @return Whether the current event is a start tag with the specified name.
+   * @throws XmlPullParserException If an error occurs querying the parser.
+   */
+  public static boolean isStartTag(XmlPullParser xpp, String name) throws XmlPullParserException {
+    return isStartTag(xpp) && xpp.getName().equals(name);
+  }
+
+  /**
+   * Returns whether the current event is a start tag.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @return Whether the current event is a start tag.
+   * @throws XmlPullParserException If an error occurs querying the parser.
+   */
+  public static boolean isStartTag(XmlPullParser xpp) throws XmlPullParserException {
+    return xpp.getEventType() == XmlPullParser.START_TAG;
+  }
+
+  /**
+   * Returns whether the current event is a start tag with the specified name. If the current event
+   * has a raw name then its prefix is stripped before matching.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @param name The specified name.
+   * @return Whether the current event is a start tag with the specified name.
+   * @throws XmlPullParserException If an error occurs querying the parser.
+   */
+  public static boolean isStartTagIgnorePrefix(XmlPullParser xpp, String name)
+      throws XmlPullParserException {
+    return isStartTag(xpp) && stripPrefix(xpp.getName()).equals(name);
+  }
+
+  /**
+   * Returns the value of an attribute of the current start tag.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @param attributeName The name of the attribute.
+   * @return The value of the attribute, or null if the current event is not a start tag or if no
+   *     such attribute was found.
+   */
+  public static @Nullable String getAttributeValue(XmlPullParser xpp, String attributeName) {
+    int attributeCount = xpp.getAttributeCount();
+    for (int i = 0; i < attributeCount; i++) {
+      if (xpp.getAttributeName(i).equals(attributeName)) {
+        return xpp.getAttributeValue(i);
+      }
+    }
+    return null;
+  }
+
+  /**
+   * Returns the value of an attribute of the current start tag. Any raw attribute names in the
+   * current start tag have their prefixes stripped before matching.
+   *
+   * @param xpp The {@link XmlPullParser} to query.
+   * @param attributeName The name of the attribute.
+   * @return The value of the attribute, or null if the current event is not a start tag or if no
+   *     such attribute was found.
+   */
+  public static @Nullable String getAttributeValueIgnorePrefix(
+      XmlPullParser xpp, String attributeName) {
+    int attributeCount = xpp.getAttributeCount();
+    for (int i = 0; i < attributeCount; i++) {
+      if (stripPrefix(xpp.getAttributeName(i)).equals(attributeName)) {
+        return xpp.getAttributeValue(i);
+      }
+    }
+    return null;
+  }
+
+  private static String stripPrefix(String name) {
+    int prefixSeparatorIndex = name.indexOf(':');
+    return prefixSeparatorIndex == -1 ? name : name.substring(prefixSeparatorIndex + 1);
+  }
+}