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A collection of general utilities.
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/*
* Copyright (c) 2013-2018, João Vitor Verona Biazibetti - All Rights Reserved
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see .
*
* https://www.github.com/BloodShura
*/
package com.github.bloodshura.x.utilities.compiler;
import com.github.bloodshura.x.charset.TextBuilder;
import com.github.bloodshura.x.collection.list.XList;
import com.github.bloodshura.x.collection.list.impl.XArrayList;
import com.github.bloodshura.x.collection.view.XBasicView;
import com.github.bloodshura.x.collection.view.XView;
import com.github.bloodshura.x.io.exception.FileException;
import com.github.bloodshura.x.io.file.Directory;
import com.github.bloodshura.x.io.file.File;
import com.github.bloodshura.x.resource.Resource;
import com.github.bloodshura.x.sys.XSystem;
import com.github.bloodshura.x.utilities.compiler.exception.CompileException;
import javax.annotation.Nonnull;
import javax.tools.Diagnostic;
import javax.tools.Diagnostic.Kind;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
import java.io.IOException;
import java.util.Locale;
public class ExternalCompiler extends XArrayList {
public void add(@Nonnull CharSequence className, @Nonnull Resource resource) throws FileException, IOException {
add(XSystem.getTempFolder(), className, resource);
}
public void add(@Nonnull Directory output, @Nonnull CharSequence className, @Nonnull Resource resource) throws FileException, IOException {
File file = new File(output, className + ".java");
file.write(resource);
add(file);
}
@Nonnull
public XView calculateOutputFiles() throws FileException {
XList list = new XArrayList<>();
forEach(source -> list.add(new File(source.getParent(), source.getName() + ".class")));
return new XBasicView<>(list);
}
public void compile() throws CompileException {
try {
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
if (compiler == null) {
throw new CompileException("Java Development Kit not available");
}
DiagnosticCollector diagnostics = new DiagnosticCollector<>();
try (StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnostics, null, null)) {
java.io.File[] handles = new java.io.File[size()];
for (int i = 0; i < handles.length; i++) {
handles[i] = get(i).handle();
}
Iterable compilationUnits = fileManager.getJavaFileObjects(handles);
CompilationTask task = compiler.getTask(null, fileManager, diagnostics, null, null, compilationUnits);
boolean result = task.call();
if (!result) {
for (Diagnostic diagnostic : diagnostics.getDiagnostics()) {
if (diagnostic.getKind() == Kind.ERROR) {
TextBuilder builder = new TextBuilder().setSeparator(' ');
builder.append("An error occurred while compiling code");
builder.append("at line #" + diagnostic.getLineNumber() + " and column #" + diagnostic.getColumnNumber() + ":");
builder.append(diagnostic.getMessage(Locale.getDefault()));
throw new CompileException(builder);
}
}
}
}
}
catch (IOException exception) {
throw new CompileException(exception);
}
}
}