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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.cts.tradefed.result;
     18 
     19 import com.android.tradefed.util.xml.AbstractXmlParser.ParseException;
     20 
     21 import org.xmlpull.v1.XmlPullParser;
     22 import org.xmlpull.v1.XmlPullParserException;
     23 import org.xmlpull.v1.XmlPullParserFactory;
     24 
     25 import java.io.IOException;
     26 import java.io.Reader;
     27 
     28 /**
     29  * Helper abstract class for XmlPullParser
     30  *
     31  * TODO: move to com.android.tradefed.util.xml
     32  */
     33 public abstract class AbstractXmlPullParser {
     34 
     35     /**
     36      * Parse the summary data from the given input data.
     37      *
     38      * @param xmlReader the input XML
     39      * @throws ParseException if failed to parse the summary data.
     40      */
     41     public void parse(Reader xmlReader) throws ParseException {
     42         try {
     43             XmlPullParserFactory fact = org.xmlpull.v1.XmlPullParserFactory.newInstance();
     44             XmlPullParser parser = fact.newPullParser();
     45             parser.setInput (xmlReader);
     46             parse(parser);
     47         } catch (XmlPullParserException e) {
     48            throw new ParseException(e);
     49         } catch (IOException e) {
     50             throw new ParseException(e);
     51         }
     52     }
     53 
     54     abstract void parse(XmlPullParser parser) throws XmlPullParserException, IOException;
     55 
     56     /**
     57      * Parse an integer value from an XML attribute
     58      *
     59      * @param parser the {@link XmlPullParser}
     60      * @param name the attribute name
     61      * @return the parsed value or 0 if it could not be parsed
     62      */
     63     protected int parseIntAttr(XmlPullParser parser, String name) {
     64         try {
     65             String value = parser.getAttributeValue(null, name);
     66             if (value != null) {
     67                 return Integer.parseInt(value);
     68             }
     69         } catch (NumberFormatException e) {
     70             // ignore
     71         }
     72         return 0;
     73     }
     74 
     75     /**
     76      * Parse a boolean attribute value
     77      */
     78     protected boolean parseBooleanAttr(XmlPullParser parser, String name) {
     79         String stringValue = parser.getAttributeValue(null, name);
     80         return stringValue != null &&
     81                 Boolean.parseBoolean(stringValue);
     82     }
     83 
     84     /**
     85      * Helper method for retrieving attribute value with given name
     86      *
     87      * @param parser the XmlPullParser
     88      * @param name the attribute name
     89      * @return the attribute value
     90      */
     91     protected String getAttribute(XmlPullParser parser, String name) {
     92         return parser.getAttributeValue(null, name);
     93     }
     94 }
     95