1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config.model.application.provider;
import com.thaiopensource.util.PropertyMap;
import com.thaiopensource.util.PropertyMapBuilder;
import com.thaiopensource.validate.ValidateProperty;
import com.thaiopensource.validate.ValidationDriver;
import com.thaiopensource.validate.rng.CompactSchemaReader;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.io.IOUtils;
import com.yahoo.io.reader.NamedReader;
import com.yahoo.yolean.Exceptions;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.io.File;
import java.io.IOException;
import java.io.LineNumberReader;
import java.io.Reader;
import java.io.StringReader;
import java.util.logging.Level;
/**
* Validates xml files against a schema.
* Note: Tested by SchemaValidatorTest in config-model module, since
* needed schema files are in that module
*
* @author Tony Vaagenes
*/
public class SchemaValidator {
private static final int linesOfContextForErrors = 3;
private final CustomErrorHandler errorHandler = new CustomErrorHandler();
private final ValidationDriver driver;
private final DeployLogger deployLogger;
/**
* Initializes the validator by using the given file as schema file
*
* @param schemaFile schema file
* @throws IOException if it is not possible to read schema files
*/
SchemaValidator(File schemaFile, DeployLogger deployLogger) throws IOException, SAXException {
this.deployLogger = deployLogger;
this.driver = new ValidationDriver(PropertyMap.EMPTY, instanceProperties(), CompactSchemaReader.getInstance());
driver.loadSchema(ValidationDriver.fileInputSource(schemaFile));
}
public void validate(File file) throws IOException {
validate(file, file.getName());
}
public void validate(File file, String fileName) throws IOException {
validate(IOUtils.createReader(file.getAbsolutePath()), fileName);
}
public void validate(Reader reader) throws IOException {
validate(reader, null);
}
public void validate(NamedReader reader) throws IOException {
validate(reader, reader.getName());
}
private void validate(Reader reader, String fileName) throws IOException {
errorHandler.fileName = (fileName == null ? "input" : fileName);
// We need to read from a reader in error handler, so need to read all content into a new one
Reader newReader = new StringReader(IOUtils.readAll(reader));
errorHandler.reader = newReader;
try {
if ( ! driver.validate(new InputSource(newReader))) {
// Shouldn't happen, error handler should have thrown
throw new RuntimeException("Aborting due to earlier XML errors.");
}
} catch (SAXException e) {
// Shouldn't happen, error handler should have thrown
throw new IllegalArgumentException("XML error in " + errorHandler.fileName + ": " + Exceptions.toMessageString(e));
}
}
private PropertyMap instanceProperties() {
PropertyMapBuilder builder = new PropertyMapBuilder();
builder.put(ValidateProperty.ERROR_HANDLER, errorHandler);
return builder.toPropertyMap();
}
private class CustomErrorHandler implements ErrorHandler {
volatile String fileName;
volatile Reader reader;
public void warning(SAXParseException e) {
deployLogger.logApplicationPackage(Level.WARNING, message(e));
}
public void error(SAXParseException e) {
throw new IllegalArgumentException(message(e));
}
public void fatalError(SAXParseException e) {
throw new IllegalArgumentException(message(e));
}
private String message(SAXParseException e) {
return "Invalid XML according to XML schema, error in " + fileName + ": " +
Exceptions.toMessageString(e)
+ " [" + e.getLineNumber() + ":" + e.getColumnNumber() + "]" +
", input:\n" + getErrorContext(e.getLineNumber());
}
private String getErrorContext(int lineNumberWithError) {
if (!(reader instanceof StringReader)) return "";
int fromLine = Math.max(0, lineNumberWithError - linesOfContextForErrors);
int toLine = lineNumberWithError + linesOfContextForErrors;
LineNumberReader r = new LineNumberReader(reader);
StringBuilder sb = new StringBuilder();
String line;
try {
reader.reset();
while ((line = r.readLine()) != null) {
int lineNumber = r.getLineNumber();
if (lineNumber >= fromLine && lineNumber <= toLine)
sb.append(lineNumber).append(":").append(line).append("\n");
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
}
}
|
