| /* |
| * 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.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); |
| } |
| } |