package cn.bran.japid.rendererloader;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.StringTokenizer;
import org.eclipse.jdt.core.compiler.IProblem;
import org.eclipse.jdt.internal.compiler.ClassFile;
import org.eclipse.jdt.internal.compiler.CompilationResult;
import org.eclipse.jdt.internal.compiler.Compiler;
import org.eclipse.jdt.internal.compiler.DefaultErrorHandlingPolicies;
import org.eclipse.jdt.internal.compiler.ICompilerRequestor;
import org.eclipse.jdt.internal.compiler.IErrorHandlingPolicy;
import org.eclipse.jdt.internal.compiler.IProblemFactory;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.env.ICompilationUnit;
import org.eclipse.jdt.internal.compiler.env.INameEnvironment;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.compiler.problem.DefaultProblemFactory;
/**
* Java compiler (uses eclipse JDT)
*
* based on
*/
public class RendererCompiler {
Map<String, Boolean> packagesCache = new HashMap<String, Boolean>();
Map<String, RendererClass> classes ;//= new HashMap<String, RendererClass>();
TemplateClassLoader crlr;
Map<String, String> settings;
{
/**
* Try to guess the magic configuration options
*/
this.settings = new HashMap<String, String>();
this.settings.put(CompilerOptions.OPTION_ReportMissingSerialVersion, CompilerOptions.IGNORE);
this.settings.put(CompilerOptions.OPTION_LineNumberAttribute, CompilerOptions.GENERATE);
this.settings.put(CompilerOptions.OPTION_SourceFileAttribute, CompilerOptions.GENERATE);
this.settings.put(CompilerOptions.OPTION_ReportDeprecation, CompilerOptions.IGNORE);
this.settings.put(CompilerOptions.OPTION_ReportUnusedImport, CompilerOptions.IGNORE);
this.settings.put(CompilerOptions.OPTION_Encoding, "UTF-8");
this.settings.put(CompilerOptions.OPTION_LocalVariableAttribute, CompilerOptions.GENERATE);
String javaVersion = CompilerOptions.VERSION_1_6;
this.settings.put(CompilerOptions.OPTION_Source, javaVersion);
this.settings.put(CompilerOptions.OPTION_TargetPlatform, javaVersion);
this.settings.put(CompilerOptions.OPTION_PreserveUnusedLocal, CompilerOptions.PRESERVE);
this.settings.put(CompilerOptions.OPTION_Compliance, javaVersion);
}
/**
* supposed to have a single instance for the entire application
*
* @param classes
* @param cl
*/
public RendererCompiler(Map<String, RendererClass> classes, TemplateClassLoader cl ) {
this.classes = classes;
this.crlr = cl;
}
/**
* Something to compile
*/
final class CompilationUnit implements ICompilationUnit {
final private String clazzName;
final private String fileName;
final private char[] typeName;
final private char[][] packageName;
CompilationUnit(String pClazzName) {
clazzName = pClazzName;
if (pClazzName.contains("$")) {
pClazzName = pClazzName.substring(0, pClazzName.indexOf("$"));
}
fileName = pClazzName.replace('.', '/') + ".java";
int dot = pClazzName.lastIndexOf('.');
if (dot > 0) {
typeName = pClazzName.substring(dot + 1).toCharArray();
} else {
typeName = pClazzName.toCharArray();
}
StringTokenizer izer = new StringTokenizer(pClazzName, ".");
packageName = new char[izer.countTokens() - 1][];
for (int i = 0; i < packageName.length; i++) {
packageName[i] = izer.nextToken().toCharArray();
}
}
@Override
public char[] getFileName() {
return fileName.toCharArray();
}
@Override
public char[] getContents() {
return classes.get(clazzName).getSourceCode().toCharArray();
}
@Override
public char[] getMainTypeName() {
return typeName;
}
@Override
public char[][] getPackageName() {
return packageName;
}
}
/**
* Please compile this className and set the bytecode to the class holder
*/
@SuppressWarnings("deprecation")
public void compile(String[] classNames) {
ICompilationUnit[] compilationUnits = new CompilationUnit[classNames.length];
for (int i = 0; i < classNames.length; i++) {
compilationUnits[i] = new CompilationUnit(classNames[i]);
}
IErrorHandlingPolicy policy = DefaultErrorHandlingPolicies.exitOnFirstError();
IProblemFactory problemFactory = new DefaultProblemFactory(Locale.ENGLISH);
/**
* To find types ...
*/
INameEnvironment nameEnvironment = new INameEnvironment() {
@Override
public NameEnvironmentAnswer findType(final char[][] compoundTypeName) {
final StringBuffer result = new StringBuffer();
for (int i = 0; i < compoundTypeName.length; i++) {
if (i != 0) {
result.append('.');
}
result.append(compoundTypeName[i]);
}
return findType(result.toString());
}
@Override
public NameEnvironmentAnswer findType(final char[] typeName, final char[][] packageName) {
final StringBuffer result = new StringBuffer();
for (int i = 0; i < packageName.length; i++) {
result.append(packageName[i]);
result.append('.');
}
result.append(typeName);
return findType(result.toString());
}
private NameEnvironmentAnswer findType(final String name) {
try {
if (!name.startsWith("japidviews.")) {
// let super class loader to load the bytecode
byte[] bytes = crlr.getClassDefinition(name);
if (bytes != null) {
ClassFileReader classFileReader = new ClassFileReader(bytes, name.toCharArray(), true);
return new NameEnvironmentAnswer(classFileReader, null);
}
return null;
}
char[] fileName = name.toCharArray();
RendererClass applicationClass = classes.get(name);
// ApplicationClass exists
if (applicationClass != null) {
byte[] bytecode = applicationClass.getBytecode();
if (bytecode != null) {
ClassFileReader classFileReader = new ClassFileReader(bytecode, fileName, true);
return new NameEnvironmentAnswer(classFileReader, null);
}
// Cascade compilation
ICompilationUnit compilationUnit = new CompilationUnit(name);
return new NameEnvironmentAnswer(compilationUnit, null);
}
// So it's a standard class
byte[] bytes = crlr.getClassDefinition(name);
if (bytes != null) {
ClassFileReader classFileReader = new ClassFileReader(bytes, fileName, true);
return new NameEnvironmentAnswer(classFileReader, null);
}
// So it does not exist
return null;
} catch (ClassFormatException e) {
// Something very very bad
throw new RuntimeException(e);
}
}
@Override
public boolean isPackage(char[][] parentPackageName, char[] packageName) {
// Rebuild something usable
StringBuilder sb = new StringBuilder();
if (parentPackageName != null) {
for (char[] p : parentPackageName) {
sb.append(new String(p));
sb.append(".");
}
}
sb.append(new String(packageName));
String name = sb.toString();
if (packagesCache.containsKey(name)) {
return packagesCache.get(name).booleanValue();
}
// Check if there is a .java or .class for this resource
if (crlr.getClassDefinition(name) != null) {
packagesCache.put(name, false);
return false;
}
if (classes.get(name) != null) {
packagesCache.put(name, false);
return false;
}
packagesCache.put(name, true);
return true;
}
@Override
public void cleanup() {
}
};
/**
* Compilation result
*/
ICompilerRequestor compilerRequestor = new ICompilerRequestor() {
@Override
public void acceptResult(CompilationResult result) {
// If error
if (result.hasErrors()) {
for (IProblem problem: result.getErrors()) {
String className = new String(problem.getOriginatingFileName()).replace("/", ".");
className = className.substring(0, className.length() - 5);
String message = problem.getMessage();
if (problem.getID() == IProblem.CannotImportPackage) {
// Non sense !
message = problem.getArguments()[0] + " cannot be resolved";
}
throw new RuntimeException(className + ": " + message);
// throw new RuntimeException(className + message + problem);
}
}
// Something has been compiled
ClassFile[] clazzFiles = result.getClassFiles();
for (int i = 0; i < clazzFiles.length; i++) {
final ClassFile clazzFile = clazzFiles[i];
final char[][] compoundName = clazzFile.getCompoundName();
final StringBuffer clazzName = new StringBuffer();
for (int j = 0; j < compoundName.length; j++) {
if (j != 0) {
clazzName.append('.');
}
clazzName.append(compoundName[j]);
}
byte[] bytes = clazzFile.getBytes();
System.out.println("[RenderCompiler]Compiled " + clazzName);
// XXX address anonymous inner class issue!! ....$1...
String cname = clazzName.toString();
RendererClass rc = classes.get(cname);
if (rc == null) {
if (cname.contains("$")) {
// inner class
rc = new RendererClass();
rc.className = cname;
classes.put(cname, rc);
}
else {
throw new RuntimeException("name not in the classes container: " + cname);
}
}
rc.setBytecode(bytes);
}
}
};
/**
* The JDT compiler
*/
Compiler jdtCompiler = new Compiler(nameEnvironment, policy, settings, compilerRequestor, problemFactory) {
@Override
protected void handleInternalException(Throwable e, CompilationUnitDeclaration ud, CompilationResult result) {
}
};
// Go !
jdtCompiler.compile(compilationUnits);
}
}