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package org.apache.jasper.compiler;
import javax.tools.DiagnosticCollector;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.ToolProvider;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.SimpleJavaFileObject;
import javax.tools.ForwardingJavaFileManager;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Reader;
import java.io.Writer;
import java.io.CharArrayWriter;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.Map;
import java.util.List;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Arrays;
import java.util.Set;
import org.apache.jasper.JasperException;
import org.apache.jasper.Constants;
import org.apache.jasper.JspCompilationContext;
/**
* Invoke Java Compiler per JSR 199, using in-memory storage for both the
* input Java source and the generated bytecodes.
*
* @author Kin-man Chung
*/
public class Jsr199JavaCompiler implements JavaCompiler {
private List cpath;
private JspRuntimeContext rtctxt;
private ArrayList classFiles;
// a JSP compilation can produce multiple class files, we need to
// keep track of all generated bytecodes..
private ArrayList options = new ArrayList();
private CharArrayWriter charArrayWriter;
private JspCompilationContext ctxt;
private String javaFileName;
private String javaEncoding;
private ErrorDispatcher errDispatcher;
public void init(JspCompilationContext ctxt,
ErrorDispatcher errDispatcher,
boolean suppressLogging) {
this.ctxt = ctxt;
this.errDispatcher = errDispatcher;
rtctxt = ctxt.getRuntimeContext();
options.add("-proc:none"); // Disable annotation processing
}
public void release() {
classFiles = null; // release temp bytecodes
}
public void setClassPath(List path) {
// Jsr199 does not expand jar manifest Class-Path (JDK bug?), we
// need to do it here
List paths = new ArrayList();
for (File f: path) {
paths.add(f.toString());
}
List files = JspUtil.expandClassPath(paths);
this.cpath = new ArrayList();
for (String file: files) {
this.cpath.add(new File(file));
}
}
public void setExtdirs(String exts) {
options.add("-extdirs");
options.add(exts);
}
public void setSourceVM(String sourceVM) {
options.add("-source");
options.add(sourceVM);
}
public void setTargetVM(String targetVM) {
options.add("-target");
options.add(targetVM);
}
public void saveClassFile(String className, String classFileName) {
for (BytecodeFile bytecodeFile: classFiles) {
String c = bytecodeFile.getClassName();
String f = classFileName;
if (!className.equals(c)) {
// Compute inner class file name
f = f.substring(0, f.lastIndexOf(File.separator)+1) +
c.substring(c.lastIndexOf('.')+1) + ".class";
}
rtctxt.saveBytecode(c, f);
}
}
public void doJavaFile(boolean keep) throws JasperException {
if (! keep) {
charArrayWriter = null;
return;
}
try {
Writer writer = new OutputStreamWriter(
new FileOutputStream(javaFileName),
javaEncoding);
writer.write(charArrayWriter.toString());
writer.close();
charArrayWriter = null;
} catch (UnsupportedEncodingException ex) {
errDispatcher.jspError("jsp.error.needAlternateJavaEncoding",
javaEncoding);
} catch (IOException ex) {
throw new JasperException(ex);
}
}
public void setDebug(boolean debug) {
if (debug) {
options.add("-g");
} else {
options.add("-g:none");
}
}
public Writer getJavaWriter(String javaFileName, String javaEncoding) {
this.javaFileName = javaFileName;
this.javaEncoding = javaEncoding;
this.charArrayWriter = new CharArrayWriter();
return this.charArrayWriter;
}
public long getClassLastModified() {
String className = ctxt.getFullClassName();
return rtctxt.getBytecodeBirthTime(className);
}
public JavacErrorDetail[] compile(String className, Node.Nodes pageNodes)
throws JasperException {
final String source = charArrayWriter.toString();
classFiles = new ArrayList();
javax.tools.JavaCompiler javac = ToolProvider.getSystemJavaCompiler();
if (javac == null) {
errDispatcher.jspError("jsp.error.nojdk");
}
DiagnosticCollector diagnostics =
new DiagnosticCollector();
StandardJavaFileManager stdFileManager =
javac.getStandardFileManager(diagnostics, null, null);
String name = className.substring(className.lastIndexOf('.')+1);
JavaFileObject[] sourceFiles = {
new SimpleJavaFileObject(
URI.create("string:///" + name.replace('.','/') +
Kind.SOURCE.extension),
Kind.SOURCE) {
public CharSequence getCharContent(boolean ignore) {
return source;
}
}
};
try {
stdFileManager.setLocation(StandardLocation.CLASS_PATH, this.cpath);
} catch (IOException e) {
}
JavaFileManager javaFileManager = getJavaFileManager(stdFileManager);
javax.tools.JavaCompiler.CompilationTask ct =
javac.getTask(null,
javaFileManager,
diagnostics,
options,
null,
Arrays.asList(sourceFiles));
try {
javaFileManager.close();
} catch (IOException ex) {
}
if (ct.call()) {
for (BytecodeFile bytecodeFile: classFiles) {
rtctxt.setBytecode(bytecodeFile.getClassName(),
bytecodeFile.getBytecode());
}
return null;
}
// There are compilation errors!
ArrayList problems =
new ArrayList();
for (Diagnostic dm: diagnostics.getDiagnostics()) {
problems.add(ErrorDispatcher.createJavacError(
javaFileName,
pageNodes,
new StringBuilder(dm.getMessage(null)),
(int) dm.getLineNumber()));
}
return problems.toArray(new JavacErrorDetail[0]);
}
private static class BytecodeFile extends SimpleJavaFileObject {
private byte[] bytecode;
private String className;
BytecodeFile(URI uri, String className) {
super(uri, Kind.CLASS);
this.className = className;
}
String getClassName() {
return this.className;
}
byte[] getBytecode() {
return this.bytecode;
}
public OutputStream openOutputStream() {
return new ByteArrayOutputStream() {
public void close() {
bytecode = this.toByteArray();
}
};
}
public InputStream openInputStream() {
return new ByteArrayInputStream(bytecode);
}
}
private JavaFileObject getOutputFile(final String className,
final URI uri) {
BytecodeFile classFile = new BytecodeFile(uri, className);
// File the class file away, by its package name
String packageName = className.substring(0, className.lastIndexOf("."));
Map> packageMap =
rtctxt.getPackageMap();
Map packageFiles = packageMap.get(packageName);
if (packageFiles == null) {
packageFiles = new HashMap();
packageMap.put(packageName, packageFiles);
}
packageFiles.put(className, classFile);
classFiles.add(classFile);
return classFile;
}
private JavaFileManager getJavaFileManager(JavaFileManager fm) {
return new ForwardingJavaFileManager(fm) {
/*
@Override
public FileObject getFileForOutput(Location location,
String packageName,
String relativeName,
FileObject sibling){
System.out.println(" At getFileForOutput: location = " +
location + " pachageName = " + packageName +
" relativeName = " + relativeName +
" sibling = " + sibling);
return getOutputFile(relativeName, null);
}
*/
@Override
public JavaFileObject getJavaFileForOutput(Location location,
String className,
Kind kind,
FileObject sibling){
return getOutputFile(className,
URI.create("file:///" + className.replace('.','/') + kind));
}
@Override
public String inferBinaryName(Location location,
JavaFileObject file) {
if (file instanceof BytecodeFile) {
return ((BytecodeFile)file).getClassName();
}
return super.inferBinaryName(location, file);
}
@Override
public Iterable list(Location location,
String packageName,
Set kinds,
boolean recurse)
throws IOException {
if (location == StandardLocation.CLASS_PATH &&
packageName.startsWith(Constants.JSP_PACKAGE_NAME)) {
// TODO: Need to handle the case where some of the classes
// are on disk
Map packageFiles
= rtctxt.getPackageMap().get(packageName);
if (packageFiles != null) {
return packageFiles.values();
}
}
Iterable lst =
super.list(location, packageName, kinds, recurse);
return lst;
}
};
}
}
