1 /*
2  * Copyright (C) 2010 Google Inc.
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.google.clearsilver.jsilver.data;
18 
19 import com.google.clearsilver.jsilver.exceptions.JSilverBadSyntaxException;
20 import com.google.clearsilver.jsilver.resourceloader.ResourceLoader;
21 
22 import java.io.FileNotFoundException;
23 import java.io.IOException;
24 import java.io.Reader;
25 
26 /**
27  * Loads data in Hierarchical Data Format (HDF) into Data objects.
28  */
29 public class HDFDataFactory implements DataFactory {
30   private final Parser hdfParser;
31   private final boolean ignoreAttributes;
32 
HDFDataFactory(boolean ignoreAttributes)33   public HDFDataFactory(boolean ignoreAttributes) {
34     this(ignoreAttributes, new NoOpStringInternStrategy());
35   }
36 
HDFDataFactory(boolean ignoreAttributes, StringInternStrategy stringInternStrategy)37   public HDFDataFactory(boolean ignoreAttributes, StringInternStrategy stringInternStrategy) {
38     this(NewHdfParser.newFactory(stringInternStrategy), ignoreAttributes);
39   }
40 
HDFDataFactory(ParserFactory hdfParserFactory, boolean ignoreAttributes)41   public HDFDataFactory(ParserFactory hdfParserFactory, boolean ignoreAttributes) {
42     this.ignoreAttributes = ignoreAttributes;
43     this.hdfParser = hdfParserFactory.newInstance();
44   }
45 
46   @Override
createData()47   public Data createData() {
48     return new DefaultData();
49   }
50 
51   @Override
loadData(final String dataFileName, ResourceLoader resourceLoader, Data output)52   public void loadData(final String dataFileName, ResourceLoader resourceLoader, Data output)
53       throws JSilverBadSyntaxException, IOException {
54     Reader reader = resourceLoader.open(dataFileName);
55     if (reader == null) {
56       throw new FileNotFoundException(dataFileName);
57     }
58     try {
59       hdfParser.parse(reader, output, new Parser.ErrorHandler() {
60         public void error(int line, String lineContent, String fileName, String errorMessage) {
61           throw new JSilverBadSyntaxException("HDF parsing error : '" + errorMessage + "'",
62               lineContent, fileName, line, JSilverBadSyntaxException.UNKNOWN_POSITION, null);
63         }
64       }, resourceLoader, dataFileName, ignoreAttributes);
65     } finally {
66       resourceLoader.close(reader);
67     }
68   }
69 
70   @Override
loadData(String dataFileName, ResourceLoader resourceLoader)71   public Data loadData(String dataFileName, ResourceLoader resourceLoader) throws IOException {
72     Data result = createData();
73     loadData(dataFileName, resourceLoader, result);
74     return result;
75   }
76 
77   @Override
getParser()78   public Parser getParser() {
79     return hdfParser;
80   }
81 }
82