2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.dew;
20 import java.io.ByteArrayInputStream;
21 import java.io.ByteArrayOutputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24 import java.io.OutputStream;
26 import java.net.URISyntaxException;
27 import java.util.ArrayList;
28 import java.util.Arrays;
29 import java.util.HashMap;
30 import java.util.List;
32 import java.util.regex.Matcher;
33 import java.util.regex.Pattern;
34 import javax.tools.Diagnostic;
35 import javax.tools.DiagnosticListener;
36 import javax.tools.FileObject;
37 import javax.tools.ForwardingJavaFileManager;
38 import javax.tools.JavaFileManager;
39 import javax.tools.JavaFileObject;
40 import javax.tools.JavaFileObject.Kind;
41 import javax.tools.SimpleJavaFileObject;
42 import javax.tools.StandardJavaFileManager;
43 import javax.tools.StandardLocation;
44 import javax.tools.ToolProvider;
48 * @author Jaroslav Tulach <jtulach@netbeans.org>
50 final class Compile implements DiagnosticListener<JavaFileObject> {
51 private final List<Diagnostic<? extends JavaFileObject>> errors = new ArrayList<>();
52 private final Map<String, byte[]> classes;
53 private final String pkg;
54 private final String cls;
55 private final String html;
57 private Compile(String html, String code) throws IOException {
58 this.pkg = findPkg(code);
59 this.cls = findCls(code);
61 classes = compile(html, code);
64 /** Performs compilation of given HTML page and associated Java code
66 public static Compile create(String html, String code) throws IOException {
67 return new Compile(html, code);
70 /** Checks for given class among compiled resources */
71 public byte[] get(String res) {
72 return classes.get(res);
75 /** Obtains errors created during compilation.
77 public List<Diagnostic<? extends JavaFileObject>> getErrors() {
78 List<Diagnostic<? extends JavaFileObject>> err = new ArrayList<>();
79 for (Diagnostic<? extends JavaFileObject> diagnostic : errors) {
80 if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
87 private Map<String, byte[]> compile(final String html, final String code) throws IOException {
88 StandardJavaFileManager sjfm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(this, null, null);
90 final Map<String, ByteArrayOutputStream> class2BAOS = new HashMap<>();
92 JavaFileObject file = new SimpleJavaFileObject(URI.create("mem://mem"), Kind.SOURCE) {
94 public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
98 final JavaFileObject htmlFile = new SimpleJavaFileObject(URI.create("mem://mem2"), Kind.OTHER) {
100 public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
105 public InputStream openInputStream() throws IOException {
106 return new ByteArrayInputStream(html.getBytes());
112 scratch = new URI("mem://mem3");
113 } catch (URISyntaxException ex) {
114 throw new IOException(ex);
117 JavaFileManager jfm = new ForwardingJavaFileManager<JavaFileManager>(sjfm) {
119 public JavaFileObject getJavaFileForOutput(Location location, String className, Kind kind, FileObject sibling) throws IOException {
120 if (kind == Kind.CLASS) {
121 final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
123 class2BAOS.put(className.replace('.', '/') + ".class", buffer);
124 return new SimpleJavaFileObject(sibling.toUri(), kind) {
126 public OutputStream openOutputStream() throws IOException {
132 if (kind == Kind.SOURCE) {
133 return new SimpleJavaFileObject(scratch/*sibling.toUri()*/, kind) {
134 private final ByteArrayOutputStream data = new ByteArrayOutputStream();
136 public OutputStream openOutputStream() throws IOException {
141 public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
143 return new String(data.toByteArray());
148 throw new IllegalStateException();
152 public FileObject getFileForInput(Location location, String packageName, String relativeName) throws IOException {
153 if (location == StandardLocation.SOURCE_PATH) {
154 if (packageName.equals(pkg)) {
164 ToolProvider.getSystemJavaCompiler().getTask(null, jfm, this, /*XXX:*/Arrays.asList("-source", "1.7", "-target", "1.7"), null, Arrays.asList(file)).call();
166 Map<String, byte[]> result = new HashMap<>();
168 for (Map.Entry<String, ByteArrayOutputStream> e : class2BAOS.entrySet()) {
169 result.put(e.getKey(), e.getValue().toByteArray());
177 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
178 errors.add(diagnostic);
180 private static String findPkg(String java) throws IOException {
181 Pattern p = Pattern.compile("package\\p{javaWhitespace}*([\\p{Alnum}\\.]+)\\p{javaWhitespace}*;", Pattern.MULTILINE);
182 Matcher m = p.matcher(java);
184 throw new IOException("Can't find package declaration in the java file");
186 String pkg = m.group(1);
189 private static String findCls(String java) throws IOException {
190 Pattern p = Pattern.compile("class\\p{javaWhitespace}*([\\p{Alnum}\\.]+)\\p{javaWhitespace}", Pattern.MULTILINE);
191 Matcher m = p.matcher(java);
193 throw new IOException("Can't find package declaration in the java file");
195 String cls = m.group(1);
200 String fqn = "'" + pkg + '.' + cls + "'";
201 return html.replace("'${fqn}'", fqn);