Upstream oodles of Chrome for Android code into Chromium.

chrome/test/android/javatests_staging/src/org/chromium/chrome/test/omaha/AttributeFinder.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.test.omaha;
+
+import android.util.Log;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+import org.xml.sax.helpers.DefaultHandler;
+
+import java.io.IOException;
+import java.io.StringReader;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+/**
+ * Pulls out a given tag attribute's value from the XML.
+ * Assumes that the same tag doesn't appear twice with the same attribute.
+ */
+public class AttributeFinder extends DefaultHandler {
+    private static final String TAG = "AttributeFinder";
+
+    private final String mDesiredTag;
+    private final String mDesiredAttribute;
+    private boolean mTagFound;
+    private String mValue;
+
+    public AttributeFinder(String xml, String tag, String attribute) {
+        mDesiredTag = tag;
+        mDesiredAttribute = attribute;
+
+        try {
+            SAXParserFactory factory = SAXParserFactory.newInstance();
+            SAXParser saxParser = factory.newSAXParser();
+            saxParser.parse(new InputSource(new StringReader(xml)), this);
+        } catch (IOException e) {
+            Log.e(TAG, "Hit IOException", e);
+        } catch (ParserConfigurationException e) {
+            Log.e(TAG, "Hit ParserConfigurationException", e);
+        } catch (SAXParseException e) {
+            Log.e(TAG, "Hit SAXParseException", e);
+        } catch (SAXException e) {
+            Log.e(TAG, "Hit SAXException", e);
+        }
+    }
+
+    @Override
+    public void startElement(String uri, String localName, String tag, Attributes attributes)
+            throws SAXException {
+        if (tag.equals(mDesiredTag)) {
+            mTagFound = true;
+            mValue = mDesiredAttribute != null ? attributes.getValue(mDesiredAttribute) : null;
+        }
+    }
+
+    public boolean isTagFound() {
+        return mTagFound;
+    }
+
+    public String getValue() {
+        return mValue;
+    }
+}