PropertiesParser.java revision 2776:aa568700edd1 
1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package propertiesparser;
27
28import propertiesparser.parser.MessageFile;
29import propertiesparser.gen.ClassGenerator;
30
31import java.io.BufferedWriter;
32import java.io.File;
33import java.io.FileInputStream;
34import java.io.FileNotFoundException;
35import java.io.FileOutputStream;
36import java.io.IOException;
37import java.io.OutputStreamWriter;
38import java.io.Writer;
39import java.lang.RuntimeException;
40import java.lang.Throwable;
41import java.text.MessageFormat;
42import java.util.ArrayList;
43import java.util.Collections;
44import java.util.HashMap;
45import java.util.Iterator;
46import java.util.List;
47import java.util.Map;
48import java.util.Properties;
49
50/** Translates a .properties file into a .java file containing an enum-like Java class
51 *  which defines static factory methods for all resource keys in a given resource file. <P>
52 *
53 *  Usage: java PropertiesParser -compile [path to .properties file] [output folder where .java file will be written]
54 *
55 * @author mcimadamore
56 */
57
58public class PropertiesParser {
59
60    public Logger logger;
61
62    public PropertiesParser(Logger logger) {
63        this.logger = logger;
64    }
65
66    public static void main(String[] args) {
67        PropertiesParser pp = new PropertiesParser(msg -> System.out.println(msg));
68        boolean ok = pp.run(args);
69        if ( !ok ) {
70            System.exit(1);
71        }
72    }
73
74    public static interface Logger {
75        void info(String msg);
76    }
77
78    public void info(String msg) {
79        logger.info(msg);
80    }
81
82    public boolean run(String[] args) {
83        Map<String, String> optionsMap = parseOptions(args);
84        if (optionsMap.isEmpty()) {
85            usage();
86            return false;
87        }
88        try {
89            optionsMap.forEach((propfile, outfile) -> compilePropertyFile(propfile, outfile));
90            return true;
91        } catch (RuntimeException ex) {
92            ex.printStackTrace();
93            return false;
94        }
95    }
96
97    private void compilePropertyFile(String propertyPath, String outPath) {
98        try {
99            File propertyFile = new File(propertyPath);
100            String prefix = propertyFile.getName().split("\\.")[0];
101            MessageFile messageFile = new MessageFile(propertyFile, prefix);
102            new ClassGenerator().generateFactory(messageFile, new File(outPath));
103        } catch (Throwable ex) {
104            throw new RuntimeException(ex);
105        }
106    }
107
108    private Map<String, String> parseOptions(String args[]) {
109        Map<String, String> optionsMap = new HashMap<>(args.length);
110        for ( int i = 0; i < args.length ; i++ ) {
111            if ( "-compile".equals(args[i]) && i+2 < args.length ) {
112                optionsMap.put(args[++i], args[++i]);
113            } else {
114                return new HashMap<>();
115            }
116        }
117        return optionsMap;
118    }
119
120    private void usage() {
121        info("usage:");
122        info("    java PropertiesParser {-compile path_to_properties_file path_to_java_output_dir}");
123        info("");
124        info("Example:");
125        info("    java PropertiesParser -compile resources/test.properties resources");
126    }
127}
128