/
PegasusDataTemplateGenerator.java
175 lines (151 loc) · 6.92 KB
/
PegasusDataTemplateGenerator.java
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
Copyright (c) 2015 LinkedIn Corp.
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.linkedin.pegasus.generator;
import com.linkedin.data.schema.DataSchema;
import com.linkedin.data.schema.DataSchemaLocation;
import com.linkedin.data.schema.NamedDataSchema;
import com.linkedin.data.schema.generator.AbstractGenerator;
import com.linkedin.pegasus.generator.spec.ClassTemplateSpec;
import com.linkedin.util.FileUtil;
import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JDefinedClass;
import com.sun.codemodel.JPackage;
import com.sun.codemodel.writer.FileCodeWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Generate Java data template files from Pegasus Data Model schema files.
*
* @author Eran Leshem
*/
public class PegasusDataTemplateGenerator
{
/**
* The system property that specifies whether to generate classes for externally resolved schemas
*/
public static final String GENERATOR_GENERATE_IMPORTED = "generator.generate.imported";
private static final Logger _log = LoggerFactory.getLogger(PegasusDataTemplateGenerator.class);
public static class DataTemplatePersistentClassChecker implements JavaCodeUtil.PersistentClassChecker
{
private final boolean _generateImported;
private final TemplateSpecGenerator _specGenerator;
private final JavaDataTemplateGenerator _dataTemplateGenerator;
private final Set<File> _sourceFiles;
public DataTemplatePersistentClassChecker(boolean generateImported,
TemplateSpecGenerator specGenerator,
JavaDataTemplateGenerator dataTemplateGenerator,
Set<File> sourceFiles)
{
_generateImported = generateImported;
_specGenerator = specGenerator;
_dataTemplateGenerator = dataTemplateGenerator;
_sourceFiles = sourceFiles;
}
@Override
public boolean isPersistent(JDefinedClass clazz)
{
if (_generateImported)
{
return true;
}
else
{
final ClassTemplateSpec spec = _dataTemplateGenerator.getGeneratedClasses().get(clazz);
final DataSchemaLocation location = _specGenerator.getClassLocation(spec);
return location == null // assume local
|| _sourceFiles.contains(location.getSourceFile());
}
}
}
public static void main(String[] args)
throws IOException
{
if (args.length < 2)
{
_log.error("Usage: PegasusDataTemplateGenerator targetDirectoryPath [sourceFile or sourceDirectory or schemaName]+");
System.exit(1);
}
final String generateImportedProperty = System.getProperty(PegasusDataTemplateGenerator.GENERATOR_GENERATE_IMPORTED);
final boolean generateImported = generateImportedProperty == null ? true : Boolean.parseBoolean(generateImportedProperty);
PegasusDataTemplateGenerator.run(System.getProperty(AbstractGenerator.GENERATOR_RESOLVER_PATH),
System.getProperty(JavaCodeGeneratorBase.GENERATOR_DEFAULT_PACKAGE),
generateImported,
args[0],
Arrays.copyOfRange(args, 1, args.length));
}
public static GeneratorResult run(String resolverPath, String defaultPackage, final boolean generateImported, String targetDirectoryPath, String[] sources)
throws IOException
{
final DataSchemaParser schemaParser = new DataSchemaParser(resolverPath);
final TemplateSpecGenerator specGenerator = new TemplateSpecGenerator(schemaParser.getSchemaResolver());
final JavaDataTemplateGenerator dataTemplateGenerator = new JavaDataTemplateGenerator(defaultPackage);
for (DataSchema predefinedSchema : JavaDataTemplateGenerator.PredefinedJavaClasses.keySet())
{
specGenerator.registerDefinedSchema(predefinedSchema);
}
final DataSchemaParser.ParseResult parseResult = schemaParser.parseSources(sources);
for (Map.Entry<DataSchema, DataSchemaLocation> entry : parseResult.getSchemaAndLocations().entrySet())
{
specGenerator.generate(entry.getKey(), entry.getValue());
}
for (ClassTemplateSpec spec : specGenerator.getGeneratedSpecs())
{
dataTemplateGenerator.generate(spec);
}
final JavaCodeUtil.PersistentClassChecker checker = new DataTemplatePersistentClassChecker(generateImported, specGenerator, dataTemplateGenerator, parseResult.getSourceFiles());
final File targetDirectory = new File(targetDirectoryPath);
final List<File> targetFiles = JavaCodeUtil.targetFiles(targetDirectory, dataTemplateGenerator.getCodeModel(), JavaCodeUtil.classLoaderFromResolverPath(schemaParser.getResolverPath()), checker);
final List<File> modifiedFiles;
if (FileUtil.upToDate(parseResult.getSourceFiles(), targetFiles))
{
modifiedFiles = Collections.emptyList();
_log.info("Target files are up-to-date: " + targetFiles);
}
else
{
modifiedFiles = targetFiles;
_log.info("Generating " + targetFiles.size() + " files");
_log.debug("Files: "+ targetFiles);
validateDefinedClassRegistration(dataTemplateGenerator.getCodeModel(), dataTemplateGenerator.getGeneratedClasses().keySet());
dataTemplateGenerator.getCodeModel().build(new FileCodeWriter(targetDirectory, true));
}
return new DefaultGeneratorResult(parseResult.getSourceFiles(), targetFiles, modifiedFiles);
}
/**
* Validates that all JDefinedClass instances in the code model have been properly registered. See {@link TemplateSpecGenerator#registerClassTemplateSpec}.
*/
private static void validateDefinedClassRegistration(JCodeModel codeModel, Collection<JDefinedClass> classes)
{
for (Iterator<JPackage> packageIterator = codeModel.packages(); packageIterator.hasNext(); )
{
final JPackage currentPackage = packageIterator.next();
for (Iterator<JDefinedClass> classIterator = currentPackage.classes(); classIterator.hasNext(); )
{
final JDefinedClass currentClass = classIterator.next();
if (!classes.contains(currentClass))
{
throw new IllegalStateException("Attempting to generate unregistered class: '" + currentClass.fullName() + "'");
}
}
}
}
}