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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.codehaus.groovy.tools.javac;
import org.apache.groovy.io.StringBuilderWriter;
import org.codehaus.groovy.ast.AnnotatedNode;
import org.codehaus.groovy.ast.AnnotationNode;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.ConstructorNode;
import org.codehaus.groovy.ast.FieldNode;
import org.codehaus.groovy.ast.GenericsType;
import org.codehaus.groovy.ast.ImportNode;
import org.codehaus.groovy.ast.InnerClassNode;
import org.codehaus.groovy.ast.MethodNode;
import org.codehaus.groovy.ast.ModuleNode;
import org.codehaus.groovy.ast.Parameter;
import org.codehaus.groovy.ast.PropertyNode;
import org.codehaus.groovy.ast.decompiled.DecompiledClassNode;
import org.codehaus.groovy.ast.expr.ArgumentListExpression;
import org.codehaus.groovy.ast.expr.ClassExpression;
import org.codehaus.groovy.ast.expr.ClosureExpression;
import org.codehaus.groovy.ast.expr.ConstantExpression;
import org.codehaus.groovy.ast.expr.ConstructorCallExpression;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.ListExpression;
import org.codehaus.groovy.ast.expr.PropertyExpression;
import org.codehaus.groovy.ast.expr.VariableExpression;
import org.codehaus.groovy.ast.stmt.BlockStatement;
import org.codehaus.groovy.ast.stmt.ExpressionStatement;
import org.codehaus.groovy.ast.stmt.Statement;
import org.codehaus.groovy.classgen.FinalVariableAnalyzer;
import org.codehaus.groovy.classgen.Verifier;
import org.codehaus.groovy.control.ResolveVisitor;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.tools.Utilities;
import org.codehaus.groovy.transform.trait.Traits;
import org.objectweb.asm.Opcodes;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.codehaus.groovy.ast.tools.GenericsUtils.correctToGenericsSpec;
import static org.codehaus.groovy.ast.tools.GenericsUtils.createGenericsSpec;
public class JavaStubGenerator {
private final boolean java5;
private final String encoding;
private final boolean requireSuperResolved;
private final File outputPath;
private final List toCompile = new ArrayList();
private final ArrayList propertyMethods = new ArrayList();
private final Map propertyMethodsWithSigs = new HashMap();
private final ArrayList constructors = new ArrayList();
private ModuleNode currentModule;
public JavaStubGenerator(final File outputPath, final boolean requireSuperResolved, final boolean java5, String encoding) {
this.outputPath = outputPath;
this.requireSuperResolved = requireSuperResolved;
this.java5 = java5;
this.encoding = encoding;
if (null != outputPath) outputPath.mkdirs();
}
public JavaStubGenerator(final File outputPath) {
this(outputPath, false, false, Charset.defaultCharset().name());
}
private static void mkdirs(File parent, String relativeFile) {
int index = relativeFile.lastIndexOf('/');
if (index == -1) return;
File dir = new File(parent, relativeFile.substring(0, index));
dir.mkdirs();
}
private static final int DEFAULT_BUFFER_SIZE = 8 * 1024; // 8K
public void generateClass(ClassNode classNode) throws FileNotFoundException {
// Only attempt to render our self if our super-class is resolved, else wait for it
if (requireSuperResolved && !classNode.getSuperClass().isResolved()) {
return;
}
// owner should take care for us
if (classNode instanceof InnerClassNode)
return;
// don't generate stubs for private classes, as they are only visible in the same file
if ((classNode.getModifiers() & Opcodes.ACC_PRIVATE) != 0) return;
String fileName = classNode.getName().replace('.', '/');
mkdirs(outputPath, fileName);
toCompile.add(fileName);
File file = new File(outputPath, fileName + ".java");
Charset charset = Charset.forName(encoding);
try (PrintWriter out = new PrintWriter(
new OutputStreamWriter(
new BufferedOutputStream(
new FileOutputStream(file),
DEFAULT_BUFFER_SIZE
),
charset
)
)) {
String packageName = classNode.getPackageName();
if (packageName != null) {
out.println("package " + packageName + ";\n");
}
printImports(out, classNode);
printClassContents(out, classNode);
}
}
private static Iterable findTraits(ClassNode node) {
Set traits = new LinkedHashSet<>();
LinkedList todo = new LinkedList<>();
Collections.addAll(todo, node.getInterfaces());
while (!todo.isEmpty()) {
ClassNode next = todo.removeLast();
if (Traits.isTrait(next)) traits.add(next);
Collections.addAll(todo, next.getInterfaces());
}
return traits;
}
private void printClassContents(PrintWriter out, ClassNode classNode) throws FileNotFoundException {
if (classNode instanceof InnerClassNode && ((InnerClassNode) classNode).isAnonymous()) {
// if it is an anonymous inner class, don't generate the stub code for it.
return;
}
try {
Verifier verifier = new Verifier() {
@Override
public void visitClass(ClassNode node) {
List savedStatements = new ArrayList<>(node.getObjectInitializerStatements());
super.visitClass(node);
node.getObjectInitializerStatements().addAll(savedStatements);
for (ClassNode trait : findTraits(node)) {
// GROOVY-9031: replace property type placeholder with resolved type from trait generics
Map generics = trait.isUsingGenerics() ? createGenericsSpec(trait) : null;
for (PropertyNode traitProperty : trait.getProperties()) {
ClassNode traitPropertyType = traitProperty.getType();
traitProperty.setType(correctToGenericsSpec(generics, traitPropertyType));
super.visitProperty(traitProperty);
traitProperty.setType(traitPropertyType);
}
}
}
@Override
protected FinalVariableAnalyzer.VariableNotFinalCallback getFinalVariablesCallback() {
return null;
}
@Override
public void visitProperty(PropertyNode node) {
// GROOVY-8233 skip static properties for traits since they don't make the interface
if (!node.isStatic() || !Traits.isTrait(node.getDeclaringClass())) {
super.visitProperty(node);
}
}
public void addCovariantMethods(ClassNode cn) {}
protected void addInitialization(ClassNode node) {}
protected void addPropertyMethod(MethodNode method) {
doAddMethod(method);
}
protected void addReturnIfNeeded(MethodNode node) {}
protected MethodNode addMethod(ClassNode node, boolean shouldBeSynthetic, String name, int modifiers, ClassNode returnType, Parameter[] parameters, ClassNode[] exceptions, Statement code) {
return doAddMethod(new MethodNode(name, modifiers, returnType, parameters, exceptions, code));
}
protected void addConstructor(Parameter[] newParams, ConstructorNode ctor, Statement code, ClassNode node) {
if (code instanceof ExpressionStatement) {//GROOVY-4508
Statement temp = code;
code = new BlockStatement();
((BlockStatement) code).addStatement(temp);
}
ConstructorNode ctrNode = new ConstructorNode(ctor.getModifiers(), newParams, ctor.getExceptions(), code);
ctrNode.setDeclaringClass(node);
constructors.add(ctrNode);
}
protected void addDefaultParameters(DefaultArgsAction action, MethodNode method) {
final Parameter[] parameters = method.getParameters();
final Expression[] saved = new Expression[parameters.length];
for (int i = 0; i < parameters.length; i++) {
if (parameters[i].hasInitialExpression())
saved[i] = parameters[i].getInitialExpression();
}
super.addDefaultParameters(action, method);
for (int i = 0; i < parameters.length; i++) {
if (saved[i] != null)
parameters[i].setInitialExpression(saved[i]);
}
}
private MethodNode doAddMethod(MethodNode method) {
String sig = method.getTypeDescriptor();
if (propertyMethodsWithSigs.containsKey(sig)) return method;
propertyMethods.add(method);
propertyMethodsWithSigs.put(sig, method);
return method;
}
@Override
protected void addDefaultConstructor(ClassNode node) {
// not required for stub generation
}
};
int origNumConstructors = classNode.getDeclaredConstructors().size();
verifier.visitClass(classNode);
// undo unwanted side-effect of verifier
if (origNumConstructors == 0 && classNode.getDeclaredConstructors().size() == 1) {
classNode.getDeclaredConstructors().clear();
}
currentModule = classNode.getModule();
boolean isInterface = isInterfaceOrTrait(classNode);
boolean isEnum = classNode.isEnum();
boolean isAnnotationDefinition = classNode.isAnnotationDefinition();
printAnnotations(out, classNode);
printModifiers(out, classNode.getModifiers()
& ~(isInterface ? Opcodes.ACC_ABSTRACT : 0)
& ~(isEnum ? Opcodes.ACC_FINAL | Opcodes.ACC_ABSTRACT : 0));
if (isInterface) {
if (isAnnotationDefinition) {
out.print("@");
}
out.print("interface ");
} else if (isEnum) {
out.print("enum ");
} else {
out.print("class ");
}
String className = classNode.getNameWithoutPackage();
if (classNode instanceof InnerClassNode)
className = className.substring(className.lastIndexOf("$") + 1);
out.println(className);
printGenericsBounds(out, classNode, true);
ClassNode superClass = classNode.getUnresolvedSuperClass(false);
if (!isInterface && !isEnum) {
out.print(" extends ");
printType(out, superClass);
}
ClassNode[] interfaces = classNode.getInterfaces();
if (interfaces != null && interfaces.length > 0 && !isAnnotationDefinition) {
if (isInterface) {
out.println(" extends");
} else {
out.println(" implements");
}
for (int i = 0; i < interfaces.length - 1; ++i) {
out.print(" ");
printType(out, interfaces[i]);
out.print(",");
}
out.print(" ");
printType(out, interfaces[interfaces.length - 1]);
}
out.println(" {");
printFields(out, classNode);
printMethods(out, classNode, isEnum);
for (Iterator inner = classNode.getInnerClasses(); inner.hasNext(); ) {
// GROOVY-4004: Clear the methods from the outer class so that they don't get duplicated in inner ones
propertyMethods.clear();
propertyMethodsWithSigs.clear();
constructors.clear();
printClassContents(out, inner.next());
}
out.println("}");
} finally {
propertyMethods.clear();
propertyMethodsWithSigs.clear();
constructors.clear();
currentModule = null;
}
}
private void printMethods(PrintWriter out, ClassNode classNode, boolean isEnum) {
if (!isEnum) printConstructors(out, classNode);
@SuppressWarnings("unchecked")
List methods = (List) propertyMethods.clone();
methods.addAll(classNode.getMethods());
for (MethodNode method : methods) {
if (isEnum && method.isSynthetic()) {
// skip values() method and valueOf(String)
String name = method.getName();
Parameter[] params = method.getParameters();
if (name.equals("values") && params.length == 0) continue;
if (name.equals("valueOf") &&
params.length == 1 &&
params[0].getType().equals(ClassHelper.STRING_TYPE)) {
continue;
}
}
printMethod(out, classNode, method);
}
// print the methods from traits
for (ClassNode trait : findTraits(classNode)) {
Map generics = trait.isUsingGenerics() ? createGenericsSpec(trait) : null;
List traitMethods = trait.getMethods();
for (MethodNode traitOrigMethod : traitMethods) {
// GROOVY-9606: replace method return type and parameter type placeholder with resolved type from trait generics
MethodNode traitMethod = correctToGenericsSpec(generics, traitOrigMethod);
MethodNode existingMethod = classNode.getMethod(traitMethod.getName(), traitMethod.getParameters());
if (existingMethod != null) continue;
for (MethodNode propertyMethod : propertyMethods) {
if (propertyMethod.getName().equals(traitMethod.getName())) {
boolean sameParams = sameParameterTypes(propertyMethod, traitMethod);
if (sameParams) {
existingMethod = propertyMethod;
break;
}
}
}
if (existingMethod != null) continue;
boolean isCandidate = isCandidateTraitMethod(trait, traitMethod);
if (!isCandidate) continue;
printMethod(out, classNode, traitMethod);
}
}
}
private boolean isCandidateTraitMethod(ClassNode trait, MethodNode traitMethod) {
boolean precompiled = trait.redirect() instanceof DecompiledClassNode;
if (!precompiled) return !traitMethod.isAbstract();
List helperMethods = Traits.findHelper(trait).getMethods();
for (MethodNode helperMethod : helperMethods) {
boolean isSynthetic = (traitMethod.getModifiers() & Opcodes.ACC_SYNTHETIC) != 0;
if (helperMethod.getName().equals(traitMethod.getName()) && !isSynthetic && !traitMethod.getName().contains("$")) {
Parameter[] origParams = helperMethod.getParameters();
Parameter[] newParams = Arrays.copyOfRange(origParams, 1, origParams.length);
if (sameParameterTypes(newParams, traitMethod.getParameters())) return true;
}
}
return false;
}
private static boolean sameParameterTypes(final MethodNode firstMethod, final MethodNode secondMethod) {
return sameParameterTypes(firstMethod.getParameters(), secondMethod.getParameters());
}
private static boolean sameParameterTypes(final Parameter[] firstParams, final Parameter[] secondParams) {
boolean sameParams = firstParams.length == secondParams.length;
if (sameParams) {
for (int i = 0; i < firstParams.length; i++) {
if (!firstParams[i].getType().equals(secondParams[i].getType())) {
sameParams = false;
break;
}
}
}
return sameParams;
}
private void printConstructors(PrintWriter out, ClassNode classNode) {
@SuppressWarnings("unchecked")
List constrs = (List) constructors.clone();
if (constrs != null) {
constrs.addAll(classNode.getDeclaredConstructors());
for (ConstructorNode constr : constrs) {
printConstructor(out, classNode, constr);
}
}
}
private void printFields(PrintWriter out, ClassNode classNode) {
boolean isInterface = isInterfaceOrTrait(classNode);
List fields = classNode.getFields();
if (fields == null) return;
List enumFields = new ArrayList(fields.size());
List normalFields = new ArrayList(fields.size());
for (FieldNode field : fields) {
boolean isSynthetic = (field.getModifiers() & Opcodes.ACC_SYNTHETIC) != 0;
if (field.isEnum()) {
enumFields.add(field);
} else if (!isSynthetic) {
normalFields.add(field);
}
}
printEnumFields(out, enumFields);
for (FieldNode normalField : normalFields) {
printField(out, normalField, isInterface);
}
}
private static void printEnumFields(PrintWriter out, List fields) {
if (!fields.isEmpty()) {
boolean first = true;
for (FieldNode field : fields) {
if (!first) {
out.print(", ");
} else {
first = false;
}
out.print(field.getName());
}
}
out.println(";");
}
private void printField(PrintWriter out, FieldNode fieldNode, boolean isInterface) {
if ((fieldNode.getModifiers() & Opcodes.ACC_PRIVATE) != 0) return;
printAnnotations(out, fieldNode);
if (!isInterface) {
printModifiers(out, fieldNode.getModifiers());
}
ClassNode type = fieldNode.getType();
printType(out, type);
out.print(" ");
out.print(fieldNode.getName());
if (isInterface || (fieldNode.getModifiers() & Opcodes.ACC_FINAL) != 0) {
out.print(" = ");
Expression valueExpr = fieldNode.getInitialValueExpression();
if (valueExpr instanceof ConstantExpression) {
valueExpr = Verifier.transformToPrimitiveConstantIfPossible((ConstantExpression) valueExpr);
}
if (valueExpr instanceof ConstantExpression
&& fieldNode.isStatic() && fieldNode.isFinal()
&& ClassHelper.isStaticConstantInitializerType(valueExpr.getType())
&& valueExpr.getType().equals(fieldNode.getType())) {
// GROOVY-5150 : Initialize value with a dummy constant so that Java cross compiles correctly
if (ClassHelper.STRING_TYPE.equals(valueExpr.getType())) {
out.print(formatString(valueExpr.getText()));
} else if (ClassHelper.char_TYPE.equals(valueExpr.getType())) {
out.print("'"+valueExpr.getText()+"'");
} else {
ClassNode constantType = valueExpr.getType();
out.print('(');
printType(out, type);
out.print(") ");
out.print(valueExpr.getText());
if (ClassHelper.Long_TYPE.equals(ClassHelper.getWrapper(constantType))) out.print('L');
}
} else if (ClassHelper.isPrimitiveType(type)) {
String val = type == ClassHelper.boolean_TYPE ? "false" : "0";
out.print("new " + ClassHelper.getWrapper(type) + "((" + type + ")" + val + ")");
} else {
out.print("null");
}
}
out.println(";");
}
private static String formatChar(String ch) {
return "'" + escapeSpecialChars("" + ch.charAt(0)) + "'";
}
private static String formatString(String s) {
return "\"" + escapeSpecialChars(s) + "\"";
}
private static ConstructorCallExpression getConstructorCallExpression(ConstructorNode constructorNode) {
Statement code = constructorNode.getCode();
if (!(code instanceof BlockStatement))
return null;
BlockStatement block = (BlockStatement) code;
List stats = block.getStatements();
if (stats == null || stats.isEmpty())
return null;
Statement stat = (Statement) stats.get(0);
if (!(stat instanceof ExpressionStatement))
return null;
Expression expr = ((ExpressionStatement) stat).getExpression();
if (!(expr instanceof ConstructorCallExpression))
return null;
return (ConstructorCallExpression) expr;
}
private void printConstructor(PrintWriter out, ClassNode clazz, ConstructorNode constructorNode) {
printAnnotations(out, constructorNode);
// printModifiers(out, constructorNode.getModifiers());
out.print("public "); // temporary hack
String className = clazz.getNameWithoutPackage();
if (clazz instanceof InnerClassNode)
className = className.substring(className.lastIndexOf("$") + 1);
out.println(className);
printParams(out, constructorNode);
ConstructorCallExpression constrCall = getConstructorCallExpression(constructorNode);
if (constrCall == null || !constrCall.isSpecialCall()) {
out.println(" {}");
} else {
out.println(" {");
printSpecialConstructorArgs(out, constructorNode, constrCall);
out.println("}");
}
}
private static Parameter[] selectAccessibleConstructorFromSuper(ConstructorNode node) {
ClassNode type = node.getDeclaringClass();
ClassNode superType = type.getUnresolvedSuperClass();
Parameter[] bestMatch = null;
for (ConstructorNode c : superType.getDeclaredConstructors()) {
// Only look at things we can actually call
if (!c.isPublic() && !c.isProtected()) continue;
Parameter[] parameters = c.getParameters();
// workaround for GROOVY-5859: remove generic type info
Parameter[] copy = new Parameter[parameters.length];
for (int i = 0; i < copy.length; i++) {
Parameter orig = parameters[i];
copy[i] = new Parameter(orig.getOriginType().getPlainNodeReference(), orig.getName());
}
if (noExceptionToAvoid(node,c)) return copy;
if (bestMatch==null) bestMatch = copy;
}
if (bestMatch!=null) return bestMatch;
// fall back for parameterless constructor
if (superType.isPrimaryClassNode()) {
return Parameter.EMPTY_ARRAY;
}
return null;
}
private static boolean noExceptionToAvoid(ConstructorNode fromStub, ConstructorNode fromSuper) {
ClassNode[] superExceptions = fromSuper.getExceptions();
if (superExceptions==null || superExceptions.length==0) return true;
ClassNode[] stubExceptions = fromStub.getExceptions();
if (stubExceptions==null || stubExceptions.length==0) return false;
// if all remaining exceptions are used in the stub we are good
outer: for (int i=0; i args = argumentListExpression.getExpressions();
for (Expression arg : args) {
if (arg instanceof ConstantExpression) {
ConstantExpression expression = (ConstantExpression) arg;
Object o = expression.getValue();
if (o instanceof String) {
out.print("(String)null");
} else {
out.print(expression.getText());
}
} else {
ClassNode type = getConstructorArgumentType(arg, node);
printDefaultValue(out, type);
}
if (arg != args.get(args.size() - 1)) {
out.print(", ");
}
}
}
out.println(");");
}
private static ClassNode getConstructorArgumentType(Expression arg, ConstructorNode node) {
if (!(arg instanceof VariableExpression)) return arg.getType();
VariableExpression vexp = (VariableExpression) arg;
String name = vexp.getName();
for (Parameter param : node.getParameters()) {
if (param.getName().equals(name)) {
return param.getType();
}
}
return vexp.getType();
}
private void printMethod(PrintWriter out, ClassNode clazz, MethodNode methodNode) {
if (methodNode.getName().equals("")) return;
if (methodNode.isPrivate() || !Utilities.isJavaIdentifier(methodNode.getName())) return;
if (methodNode.isSynthetic() && methodNode.getName().equals("$getStaticMetaClass")) return;
printAnnotations(out, methodNode);
if (!isInterfaceOrTrait(clazz)) {
int modifiers = methodNode.getModifiers();
if (isDefaultTraitImpl(methodNode)) {
modifiers ^= Opcodes.ACC_ABSTRACT;
}
printModifiers(out, modifiers & ~(clazz.isEnum() ? Opcodes.ACC_ABSTRACT : 0));
}
printGenericsBounds(out, methodNode.getGenericsTypes());
out.print(" ");
printType(out, methodNode.getReturnType());
out.print(" ");
out.print(methodNode.getName());
printParams(out, methodNode);
ClassNode[] exceptions = methodNode.getExceptions();
for (int i = 0; i < exceptions.length; i++) {
ClassNode exception = exceptions[i];
if (i == 0) {
out.print("throws ");
} else {
out.print(", ");
}
printType(out, exception);
}
if (Traits.isTrait(clazz)) {
out.println(";");
} else if (isAbstract(methodNode) && !clazz.isEnum()) {
if (clazz.isAnnotationDefinition() && methodNode.hasAnnotationDefault()) {
Statement fs = methodNode.getFirstStatement();
if (fs instanceof ExpressionStatement) {
ExpressionStatement es = (ExpressionStatement) fs;
Expression re = es.getExpression();
out.print(" default ");
ClassNode rt = methodNode.getReturnType();
boolean classReturn = ClassHelper.CLASS_Type.equals(rt) || (rt.isArray() && ClassHelper.CLASS_Type.equals(rt.getComponentType()));
if (re instanceof ListExpression) {
out.print("{ ");
ListExpression le = (ListExpression) re;
boolean first = true;
for (Expression expression : le.getExpressions()) {
if (first) first = false;
else out.print(", ");
printValue(out, expression, classReturn);
}
out.print(" }");
} else {
printValue(out, re, classReturn);
}
}
}
out.println(";");
} else {
out.print(" { ");
ClassNode retType = methodNode.getReturnType();
printReturn(out, retType);
out.println("}");
}
}
private static boolean isAbstract(final MethodNode methodNode) {
if (isDefaultTraitImpl(methodNode)) {
return false;
}
return (methodNode.getModifiers() & Opcodes.ACC_ABSTRACT) != 0;
}
private static boolean isDefaultTraitImpl(final MethodNode methodNode) {
return Traits.isTrait(methodNode.getDeclaringClass()) && Traits.hasDefaultImplementation(methodNode);
}
private static void printValue(PrintWriter out, Expression re, boolean assumeClass) {
if (assumeClass) {
if (re.getType().getName().equals("groovy.lang.Closure")) {
out.print("groovy.lang.Closure.class");
return;
}
String className = re.getText();
out.print(className);
if (!className.endsWith(".class")) {
out.print(".class");
}
} else {
if (re instanceof ConstantExpression) {
ConstantExpression ce = (ConstantExpression) re;
Object value = ce.getValue();
if (ClassHelper.STRING_TYPE.equals(ce.getType())) {
out.print(formatString((String)value));
} else if (ClassHelper.char_TYPE.equals(ce.getType()) || ClassHelper.Character_TYPE.equals(ce.getType())) {
out.print(formatChar(value.toString()));
} else if (ClassHelper.long_TYPE.equals(ce.getType())) {
out.print("" + value + "L");
} else if (ClassHelper.float_TYPE.equals(ce.getType())) {
out.print("" + value + "f");
} else if (ClassHelper.double_TYPE.equals(ce.getType())) {
out.print("" + value + "d");
} else {
out.print(re.getText());
}
} else {
out.print(re.getText());
}
}
}
private void printReturn(PrintWriter out, ClassNode retType) {
String retName = retType.getName();
if (!retName.equals("void")) {
out.print("return ");
printDefaultValue(out, retType);
out.print(";");
}
}
private void printDefaultValue(PrintWriter out, ClassNode type) {
if (type.redirect() != ClassHelper.OBJECT_TYPE && type.redirect() != ClassHelper.boolean_TYPE) {
out.print("(");
printType(out, type);
out.print(")");
}
if (ClassHelper.isPrimitiveType(type)) {
if (type == ClassHelper.boolean_TYPE) {
out.print("false");
} else {
out.print("0");
}
} else {
out.print("null");
}
}
private void printType(PrintWriter out, ClassNode type) {
if (type.isArray()) {
printType(out, type.getComponentType());
out.print("[]");
} else if (java5 && type.isGenericsPlaceHolder()) {
out.print(type.getUnresolvedName());
} else {
printGenericsBounds(out, type, false);
}
}
private void printTypeName(PrintWriter out, ClassNode type) {
if (ClassHelper.isPrimitiveType(type)) {
if (type == ClassHelper.boolean_TYPE) {
out.print("boolean");
} else if (type == ClassHelper.char_TYPE) {
out.print("char");
} else if (type == ClassHelper.int_TYPE) {
out.print("int");
} else if (type == ClassHelper.short_TYPE) {
out.print("short");
} else if (type == ClassHelper.long_TYPE) {
out.print("long");
} else if (type == ClassHelper.float_TYPE) {
out.print("float");
} else if (type == ClassHelper.double_TYPE) {
out.print("double");
} else if (type == ClassHelper.byte_TYPE) {
out.print("byte");
} else {
out.print("void");
}
} else {
String name = type.getName();
// check for an alias
ClassNode alias = currentModule.getImportType(name);
if (alias != null) name = alias.getName();
out.print(name.replace('$', '.'));
}
}
private void printGenericsBounds(PrintWriter out, ClassNode type, boolean skipName) {
if (!skipName) printTypeName(out, type);
if (!java5) return;
if (!ClassHelper.isCachedType(type)) {
printGenericsBounds(out, type.getGenericsTypes());
}
}
private static void printGenericsBounds(PrintWriter out, GenericsType[] genericsTypes) {
if (genericsTypes == null || genericsTypes.length == 0) return;
out.print('<');
for (int i = 0; i < genericsTypes.length; i++) {
if (i != 0) out.print(", ");
out.print(genericsTypes[i].toString().replace("$","."));
}
out.print('>');
}
private void printParams(PrintWriter out, MethodNode methodNode) {
out.print("(");
Parameter[] parameters = methodNode.getParameters();
if (parameters != null && parameters.length != 0) {
int lastIndex = parameters.length - 1;
boolean vararg = parameters[lastIndex].getType().isArray();
for (int i = 0; i != parameters.length; ++i) {
printAnnotations(out, parameters[i]);
if (i == lastIndex && vararg) {
printType(out, parameters[i].getType().getComponentType());
out.print("...");
} else {
printType(out, parameters[i].getType());
}
out.print(" ");
out.print(parameters[i].getName());
if (i + 1 < parameters.length) {
out.print(", ");
}
}
}
out.print(")");
}
private void printAnnotations(PrintWriter out, AnnotatedNode annotated) {
if (!java5) return;
for (AnnotationNode annotation : annotated.getAnnotations()) {
printAnnotation(out, annotation);
}
}
private void printAnnotation(PrintWriter out, AnnotationNode annotation) {
out.print("@" + annotation.getClassNode().getName().replace('$', '.') + "(");
boolean first = true;
Map members = annotation.getMembers();
for (Map.Entry entry : members.entrySet()) {
String key = entry.getKey();
if (first) first = false;
else out.print(", ");
out.print(key + "=" + getAnnotationValue(entry.getValue()));
}
out.print(") ");
}
private String getAnnotationValue(Object memberValue) {
String val = "null";
boolean replaceDollars = true;
if (memberValue instanceof ListExpression) {
StringBuilder sb = new StringBuilder("{");
boolean first = true;
ListExpression le = (ListExpression) memberValue;
for (Expression e : le.getExpressions()) {
if (first) first = false;
else sb.append(",");
sb.append(getAnnotationValue(e));
}
sb.append("}");
val = sb.toString();
} else if (memberValue instanceof ConstantExpression) {
ConstantExpression ce = (ConstantExpression) memberValue;
Object constValue = ce.getValue();
if (constValue instanceof AnnotationNode) {
Writer writer = new StringBuilderWriter();
PrintWriter out = new PrintWriter(writer);
printAnnotation(out, (AnnotationNode) constValue);
val = writer.toString();
} else if (constValue instanceof Number || constValue instanceof Boolean) {
val = constValue.toString();
} else {
val = "\"" + escapeSpecialChars(constValue.toString()) + "\"";
replaceDollars = false;
}
} else if (memberValue instanceof PropertyExpression) {
// assume must be static class field or enum value or class that Java can resolve
val = ((Expression) memberValue).getText();
} else if (memberValue instanceof VariableExpression) {
val = ((Expression) memberValue).getText();
//check for an alias
ImportNode alias = currentModule.getStaticImports().get(val);
if (alias != null)
val = alias.getClassName() + "." + alias.getFieldName();
} else if (memberValue instanceof ClosureExpression) {
// annotation closure; replaced with this specific class literal to cover the
// case where annotation type uses Class for the closure's type
val = "groovy.lang.Closure.class";
} else if (memberValue instanceof ClassExpression) {
val = ((Expression) memberValue).getText() + ".class";
}
return replaceDollars ? val.replace('$', '.') : val;
}
private static void printModifiers(PrintWriter out, int modifiers) {
if ((modifiers & Opcodes.ACC_PUBLIC) != 0)
out.print("public ");
if ((modifiers & Opcodes.ACC_PROTECTED) != 0)
out.print("protected ");
if ((modifiers & Opcodes.ACC_PRIVATE) != 0)
out.print("private ");
if ((modifiers & Opcodes.ACC_STATIC) != 0)
out.print("static ");
if ((modifiers & Opcodes.ACC_SYNCHRONIZED) != 0)
out.print("synchronized ");
if ((modifiers & Opcodes.ACC_FINAL) != 0)
out.print("final ");
if ((modifiers & Opcodes.ACC_ABSTRACT) != 0)
out.print("abstract ");
}
private static void printImports(PrintWriter out, ClassNode classNode) {
List imports = new ArrayList();
ModuleNode moduleNode = classNode.getModule();
for (ImportNode importNode : moduleNode.getStarImports()) {
imports.add(importNode.getPackageName());
}
for (ImportNode imp : moduleNode.getImports()) {
if (imp.getAlias() == null)
imports.add(imp.getType().getName());
}
imports.addAll(Arrays.asList(ResolveVisitor.DEFAULT_IMPORTS));
for (Map.Entry entry : moduleNode.getStaticImports().entrySet()) {
if (entry.getKey().equals(entry.getValue().getFieldName()))
imports.add("static "+entry.getValue().getType().getName()+"."+entry.getKey());
}
for (Map.Entry entry : moduleNode.getStaticStarImports().entrySet()) {
imports.add("static "+entry.getValue().getType().getName()+".");
}
for (String imp : imports) {
String s = ("import " +
imp +
((imp.charAt(imp.length() - 1) == '.') ? "*;" : ";"))
.replace('$', '.');
out.println(s);
}
out.println();
}
public void clean() {
for (String path : toCompile) {
new File(outputPath, path + ".java").delete();
}
}
private static String escapeSpecialChars(String value) {
return InvokerHelper.escapeBackslashes(value).replace("\"", "\\\"");
}
private static boolean isInterfaceOrTrait(ClassNode cn) {
return cn.isInterface() || Traits.isTrait(cn);
}
}
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