102 lines
3.6 KiB
Java
102 lines
3.6 KiB
Java
package compiler;
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import java.awt.*;
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import java.io.*;
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import java.util.*;
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import java.util.List;
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import javax.swing.*;
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import javax.tools.*;
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import javax.tools.JavaFileObject.*;
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/**
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* @version 1.01 2016-05-10
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* @author Cay Horstmann
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*/
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public class CompilerTest
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{
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public static void main(final String[] args) throws IOException, ClassNotFoundException
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{
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JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
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final List<ByteArrayJavaClass> classFileObjects = new ArrayList<>();
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DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
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JavaFileManager fileManager = compiler.getStandardFileManager(diagnostics, null, null);
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fileManager = new ForwardingJavaFileManager<JavaFileManager>(fileManager)
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{
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public JavaFileObject getJavaFileForOutput(Location location, final String className,
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Kind kind, FileObject sibling) throws IOException
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{
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if (className.startsWith("x."))
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{
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ByteArrayJavaClass fileObject = new ByteArrayJavaClass(className);
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classFileObjects.add(fileObject);
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return fileObject;
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}
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else return super.getJavaFileForOutput(location, className, kind, sibling);
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}
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};
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String frameClassName = args.length == 0 ? "buttons2.ButtonFrame" : args[0];
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JavaFileObject source = buildSource(frameClassName);
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JavaCompiler.CompilationTask task = compiler.getTask(null, fileManager, diagnostics, null,
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null, Arrays.asList(source));
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Boolean result = task.call();
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for (Diagnostic<? extends JavaFileObject> d : diagnostics.getDiagnostics())
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System.out.println(d.getKind() + ": " + d.getMessage(null));
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fileManager.close();
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if (!result)
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{
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System.out.println("Compilation failed.");
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System.exit(1);
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}
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EventQueue.invokeLater(() ->
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{
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try
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{
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Map<String, byte[]> byteCodeMap = new HashMap<>();
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for (ByteArrayJavaClass cl : classFileObjects)
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byteCodeMap.put(cl.getName().substring(1), cl.getBytes());
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ClassLoader loader = new MapClassLoader(byteCodeMap);
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JFrame frame = (JFrame) loader.loadClass("x.Frame").newInstance();
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.setTitle("CompilerTest");
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frame.setVisible(true);
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}
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catch (Exception ex)
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{
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ex.printStackTrace();
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}
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});
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}
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/*
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* Builds the source for the subclass that implements the addEventHandlers method.
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* @return a file object containing the source in a string builder
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*/
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static JavaFileObject buildSource(String superclassName)
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throws IOException, ClassNotFoundException
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{
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StringBuilderJavaSource source = new StringBuilderJavaSource("x.Frame");
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source.append("package x;\n");
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source.append("public class Frame extends " + superclassName + " {");
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source.append("protected void addEventHandlers() {");
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final Properties props = new Properties();
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props.load(Class.forName(superclassName).getResourceAsStream("action.properties"));
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for (Map.Entry<Object, Object> e : props.entrySet())
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{
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String beanName = (String) e.getKey();
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String eventCode = (String) e.getValue();
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source.append(beanName + ".addActionListener(event -> {");
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source.append(eventCode);
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source.append("} );");
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}
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source.append("} }");
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return source;
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}
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}
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