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/*
* 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.ast;
import org.apache.groovy.ast.tools.ClassNodeUtils;
import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.expr.BinaryExpression;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.FieldExpression;
import org.codehaus.groovy.ast.expr.TupleExpression;
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.ast.tools.ParameterUtils;
import org.codehaus.groovy.control.CompilePhase;
import org.codehaus.groovy.transform.ASTTransformation;
import org.codehaus.groovy.transform.GroovyASTTransformation;
import org.codehaus.groovy.vmplugin.VMPluginFactory;
import org.objectweb.asm.Opcodes;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.Set;
/**
* Represents a class in the AST.
*
* A ClassNode should be created using the methods in ClassHelper.
* This ClassNode may be used to represent a class declaration or
* any other type. This class uses a proxy mechanism allowing to
* create a class for a plain name at AST creation time. In another
* phase of the compiler the real ClassNode for the plain name may be
* found. To avoid the need of exchanging this ClassNode with an
* instance of the correct ClassNode the correct ClassNode is set as
* redirect. Most method calls are then redirected to that ClassNode.
*
* There are three types of ClassNodes:
*
* - Primary ClassNodes:
* A primary ClassNode is one where we have a source representation
* which is to be compiled by Groovy and which we have an AST for.
* The groovy compiler will output one class for each such ClassNode
* that passes through AsmBytecodeGenerator... not more, not less.
* That means for example Closures become such ClassNodes too at
* some point.
* - ClassNodes create through different sources (typically created
* from a java.lang.reflect.Class object):
* The compiler will not output classes from these, the methods
* usually do not contain bodies. These kind of ClassNodes will be
* used in different checks, but not checks that work on the method
* bodies. For example if such a ClassNode is a super class to a primary
* ClassNode, then the abstract method test and others will be done
* with data based on these. Theoretically it is also possible to mix both
* (1 and 2) kind of classes in a hierarchy, but this probably works only
* in the newest Groovy versions. Such ClassNodes normally have to
* isResolved() returning true without having a redirect.In the Groovy
* compiler the only version of this, that exists, is a ClassNode created
* through a Class instance
* - Labels:
* ClassNodes created through ClassHelper.makeWithoutCaching. They
* are place holders, its redirect points to the real structure, which can
* be a label too, but following all redirects it should end with a ClassNode
* from one of the other two categories. If ResolveVisitor finds such a
* node, it tries to set the redirects. Any such label created after
* ResolveVisitor has done its work needs to have a redirect pointing to
* case 1 or 2. If not the compiler may react strange... this can be considered
* as a kind of dangling pointer.
*
* Note: the redirect mechanism is only allowed for classes
* that are not primary ClassNodes. Typically this is done for classes
* created by name only. The redirect itself can be any type of ClassNode.
*
* To describe generic type signature see {@link #getGenericsTypes()} and
* {@link #setGenericsTypes(GenericsType[])}. These methods are not proxied,
* they describe the type signature used at the point of declaration or the
* type signatures provided by the class. If the type signatures provided
* by the class are needed, then a call to {@link #redirect()} will help.
*
* @see org.codehaus.groovy.ast.ClassHelper
*/
public class ClassNode extends AnnotatedNode implements Opcodes {
private static class MapOfLists {
Map> map;
List get(Object key) {
return map == null ? null : map.get(key);
}
List getNotNull(Object key) {
List list = get(key);
if (list == null) list = Collections.emptyList();
return list;
}
void put(Object key, MethodNode value) {
if (map == null) {
map = new LinkedHashMap>();
}
if (map.containsKey(key)) {
get(key).add(value);
} else {
List list = new ArrayList(2);
list.add(value);
map.put(key, list);
}
}
void remove(Object key, MethodNode value) {
get(key).remove(value);
}
}
public static final ClassNode[] EMPTY_ARRAY = new ClassNode[0];
public static final ClassNode THIS = new ClassNode(Object.class);
public static final ClassNode SUPER = new ClassNode(Object.class);
private String name;
private int modifiers;
private boolean syntheticPublic;
private ClassNode[] interfaces;
private MixinNode[] mixins;
private List constructors;
private List objectInitializers;
private MapOfLists methods;
private List methodsList;
private LinkedList fields;
private List properties;
private Map fieldIndex;
private ModuleNode module;
private CompileUnit compileUnit;
private boolean staticClass;
private boolean scriptBody;
private boolean script;
private ClassNode superClass;
protected boolean isPrimaryNode;
protected List innerClasses;
/**
* The AST Transformations to be applied during compilation.
*/
private Map, Set>> transformInstances;
// use this to synchronize access for the lazy init
protected final Object lazyInitLock = new Object();
// clazz!=null when resolved
protected Class clazz;
// only false when this classNode is constructed from a class
private volatile boolean lazyInitDone = true;
// not null if if the ClassNode is an array
private ClassNode componentType;
// if not null this instance is handled as proxy
// for the redirect
private ClassNode redirect;
// flag if the classes or its members are annotated
private boolean annotated;
// type spec for generics
private GenericsType[] genericsTypes;
private boolean usesGenerics;
// if set to true the name getGenericsTypes consists
// of 1 element describing the name of the placeholder
private boolean placeholder;
/**
* Returns the {@code ClassNode} this node is a proxy for or the node itself.
*/
public ClassNode redirect() {
return (redirect == null ? this : redirect.redirect());
}
public boolean isRedirectNode() {
return (redirect != null);
}
/**
* Sets this instance as proxy for the given {@code ClassNode}.
*
* @param node the class to redirect to; if {@code null} the redirect is removed
*/
public void setRedirect(ClassNode cn) {
if (isPrimaryNode) throw new GroovyBugError("tried to set a redirect for a primary ClassNode (" + getName() + "->" + cn.getName() + ").");
if (cn != null && !isGenericsPlaceHolder()) cn = cn.redirect();
if (cn == this) return;
redirect = cn;
}
/**
* Returns a {@code ClassNode} representing an array of the type represented
* by this.
*/
public ClassNode makeArray() {
if (redirect != null) {
ClassNode res = redirect().makeArray();
res.componentType = this;
return res;
}
ClassNode cn;
if (clazz != null) {
Class ret = Array.newInstance(clazz, 0).getClass();
// don't use the ClassHelper here!
cn = new ClassNode(ret, this);
} else {
cn = new ClassNode(this);
}
return cn;
}
/**
* @return {@code true} if this instance is a primary {@code ClassNode}
*/
public boolean isPrimaryClassNode() {
return redirect().isPrimaryNode || (componentType != null && componentType.isPrimaryClassNode());
}
/**
* Constructor used by {@code makeArray()} if no real class is available.
*/
private ClassNode(ClassNode componentType) {
this(componentType.getName() + "[]", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
this.componentType = componentType.redirect();
isPrimaryNode = false;
}
/**
* Constructor used by {@code makeArray()} if a real class is available.
*/
private ClassNode(Class c, ClassNode componentType) {
this(c);
this.componentType = componentType;
isPrimaryNode = false;
}
/**
* Creates a non-primary {@code ClassNode} from a real class.
*/
public ClassNode(Class c) {
this(c.getName(), c.getModifiers(), null, null, MixinNode.EMPTY_ARRAY);
clazz = c;
lazyInitDone = false;
isPrimaryNode = false;
}
/**
* The complete class structure will be initialized only when really needed
* to avoid having too many objects during compilation.
*/
private void lazyClassInit() {
if (lazyInitDone) return;
synchronized (lazyInitLock) {
if (redirect != null) {
throw new GroovyBugError("lazyClassInit called on a proxy ClassNode, that must not happen. " +
"A redirect() call is missing somewhere!");
}
if (lazyInitDone) return;
VMPluginFactory.getPlugin().configureClassNode(compileUnit, this);
lazyInitDone = true;
}
}
/**
* Tracks the enclosing method for local inner classes.
*/
private MethodNode enclosingMethod;
public MethodNode getEnclosingMethod() {
return redirect().enclosingMethod;
}
public void setEnclosingMethod(MethodNode enclosingMethod) {
redirect().enclosingMethod = enclosingMethod;
}
/**
* Indicates that this class has been "promoted" to public by Groovy when in
* fact there was no public modifier explicitly in the source code. That is,
* it remembers that it has applied Groovy's "public classes by default" rule.
* This property is typically only of interest to AST transform writers.
*
* @return {@code true} if node is public but had no explicit public modifier
*/
public boolean isSyntheticPublic() {
return syntheticPublic;
}
public void setSyntheticPublic(boolean syntheticPublic) {
this.syntheticPublic = syntheticPublic;
}
/**
* @param name the fully-qualified name of the class
* @param modifiers the modifiers; see {@link org.objectweb.asm.Opcodes}
* @param superClass the base class; use "java.lang.Object" if no direct base class
*/
public ClassNode(String name, int modifiers, ClassNode superClass) {
this(name, modifiers, superClass, EMPTY_ARRAY, MixinNode.EMPTY_ARRAY);
}
/**
* @param name the fully-qualified name of the class
* @param modifiers the modifiers; see {@link org.objectweb.asm.Opcodes}
* @param superClass the base class; use "java.lang.Object" if no direct base class
* @param interfaces the interfaces for this class
* @param mixins the mixins for this class
* @see org.objectweb.asm.Opcodes
*/
public ClassNode(String name, int modifiers, ClassNode superClass, ClassNode[] interfaces, MixinNode[] mixins) {
this.name = name;
this.modifiers = modifiers;
this.superClass = superClass;
this.interfaces = interfaces;
this.mixins = mixins;
isPrimaryNode = true;
if (superClass != null) {
usesGenerics = superClass.isUsingGenerics();
}
if (!usesGenerics && interfaces != null) {
for (ClassNode anInterface : interfaces) {
usesGenerics = usesGenerics || anInterface.isUsingGenerics();
if (usesGenerics) break;
}
}
this.methods = new MapOfLists();
this.methodsList = Collections.emptyList();
}
/**
* Sets the superclass of this {@code ClassNode}.
*/
public void setSuperClass(ClassNode superClass) {
redirect().superClass = superClass;
}
/**
* @return the fields associated with this {@code ClassNode}
*/
public List getFields() {
if (redirect != null)
return redirect().getFields();
lazyClassInit();
if (fields == null)
fields = new LinkedList();
return fields;
}
/**
* @return the array of interfaces which this ClassNode implements
*/
public ClassNode[] getInterfaces() {
if (redirect != null)
return redirect().getInterfaces();
lazyClassInit();
return interfaces;
}
public void setInterfaces(ClassNode[] interfaces) {
if (redirect != null) {
redirect().setInterfaces(interfaces);
} else {
this.interfaces = interfaces;
}
}
/**
* @return the mixins associated with this {@code ClassNode}
*/
public MixinNode[] getMixins() {
return redirect().mixins;
}
/**
* @return the methods associated with this {@code ClassNode}
*/
public List getMethods() {
if (redirect != null)
return redirect().getMethods();
lazyClassInit();
return methodsList;
}
/**
* @return the abstract methods associated with this {@code ClassNode}
*/
public List getAbstractMethods() {
List result = new ArrayList(3);
for (MethodNode method : getDeclaredMethodsMap().values()) {
if (method.isAbstract()) {
result.add(method);
}
}
if (!result.isEmpty()) {
return result;
}
return null;
}
public List getAllDeclaredMethods() {
return new ArrayList(getDeclaredMethodsMap().values());
}
public Set getAllInterfaces() {
Set res = new LinkedHashSet();
getAllInterfaces(res);
return res;
}
private void getAllInterfaces(Set res) {
if (isInterface()) {
res.add(this);
}
for (ClassNode anInterface : getInterfaces()) {
res.add(anInterface);
anInterface.getAllInterfaces(res);
}
}
public Map getDeclaredMethodsMap() {
Map result = ClassNodeUtils.getDeclaredMethodsFromSuper(this);
ClassNodeUtils.addDeclaredMethodsFromInterfaces(this, result);
// And add in the methods implemented in this class.
for (MethodNode method : getMethods()) {
String sig = method.getTypeDescriptor();
result.put(sig, method);
}
return result;
}
public String getName() {
return redirect().name;
}
public String getUnresolvedName() {
return name;
}
public String setName(String name) {
return redirect().name = name;
}
public int getModifiers() {
return redirect().modifiers;
}
public void setModifiers(int modifiers) {
redirect().modifiers = modifiers;
}
public List getProperties() {
ClassNode r = redirect();
if (r.properties == null)
r.properties = new ArrayList();
return r.properties;
}
public List getDeclaredConstructors() {
if (redirect != null)
return redirect().getDeclaredConstructors();
lazyClassInit();
if (constructors == null)
constructors = new ArrayList();
return constructors;
}
/**
* @return the constructor matching the given parameters or {@code null}
*/
public ConstructorNode getDeclaredConstructor(Parameter[] parameters) {
for (ConstructorNode method : getDeclaredConstructors()) {
if (parametersEqual(method.getParameters(), parameters)) {
return method;
}
}
return null;
}
public void removeConstructor(ConstructorNode node) {
getDeclaredConstructors().remove(node);
}
public ModuleNode getModule() {
return redirect().module;
}
public PackageNode getPackage() {
return getModule() != null ? getModule().getPackage() : null;
}
public void setModule(ModuleNode module) {
redirect().module = module;
if (module != null) {
redirect().compileUnit = module.getUnit();
}
}
public void addField(FieldNode node) {
addField(node, false);
}
public void addFieldFirst(FieldNode node) {
addField(node, true);
}
private void addField(FieldNode node, boolean isFirst) {
ClassNode r = redirect();
node.setDeclaringClass(r);
node.setOwner(r);
if (r.fields == null)
r.fields = new LinkedList();
if (r.fieldIndex == null)
r.fieldIndex = new LinkedHashMap();
if (isFirst) {
r.fields.addFirst(node);
} else {
r.fields.add(node);
}
r.fieldIndex.put(node.getName(), node);
}
public Map getFieldIndex() {
return fieldIndex;
}
public void addProperty(PropertyNode node) {
node.setDeclaringClass(redirect());
getProperties().add(node);
addField(node.getField());
}
public PropertyNode addProperty(String name,
int modifiers,
ClassNode type,
Expression initialValueExpression,
Statement getterBlock,
Statement setterBlock) {
for (PropertyNode pn : getProperties()) {
if (pn.getName().equals(name)) {
if (pn.getInitialExpression() == null && initialValueExpression != null)
pn.getField().setInitialValueExpression(initialValueExpression);
if (pn.getGetterBlock() == null && getterBlock != null)
pn.setGetterBlock(getterBlock);
if (pn.getSetterBlock() == null && setterBlock != null)
pn.setSetterBlock(setterBlock);
return pn;
}
}
PropertyNode node = new PropertyNode(name, modifiers, type, redirect(), initialValueExpression, getterBlock, setterBlock);
addProperty(node);
return node;
}
public boolean hasProperty(String name) {
return getProperty(name) != null;
}
public PropertyNode getProperty(String name) {
for (PropertyNode pn : getProperties()) {
if (pn.getName().equals(name)) return pn;
}
return null;
}
public void addConstructor(ConstructorNode node) {
node.setDeclaringClass(this);
ClassNode r = redirect();
if (r.constructors == null)
r.constructors = new ArrayList();
r.constructors.add(node);
}
public ConstructorNode addConstructor(int modifiers, Parameter[] parameters, ClassNode[] exceptions, Statement code) {
ConstructorNode node = new ConstructorNode(modifiers, parameters, exceptions, code);
addConstructor(node);
return node;
}
public void addMethod(MethodNode node) {
node.setDeclaringClass(this);
ClassNode r = redirect();
if (r.methodsList.isEmpty()) {
r.methodsList = new ArrayList();
}
r.methodsList.add(node);
r.methods.put(node.getName(), node);
}
public void removeMethod(MethodNode node) {
ClassNode r = redirect();
if (!r.methodsList.isEmpty()) {
r.methodsList.remove(node);
}
r.methods.remove(node.getName(), node);
}
/**
* If a method with the given name and parameters is already defined then it is returned
* otherwise the given method is added to this node. This method is useful for
* default method adding like getProperty() or invokeMethod() where there may already
* be a method defined in a class and so the default implementations should not be added
* if already present.
*/
public MethodNode addMethod(String name,
int modifiers,
ClassNode returnType,
Parameter[] parameters,
ClassNode[] exceptions,
Statement code) {
MethodNode other = getDeclaredMethod(name, parameters);
// don't add duplicate methods
if (other != null) {
return other;
}
MethodNode node = new MethodNode(name, modifiers, returnType, parameters, exceptions, code);
addMethod(node);
return node;
}
/**
* @see #getDeclaredMethod(String, Parameter[])
*/
public boolean hasDeclaredMethod(String name, Parameter[] parameters) {
MethodNode other = getDeclaredMethod(name, parameters);
return other != null;
}
/**
* @see #getMethod(String, Parameter[])
*/
public boolean hasMethod(String name, Parameter[] parameters) {
MethodNode other = getMethod(name, parameters);
return other != null;
}
/**
* Adds a synthetic method as part of the compilation process.
*/
public MethodNode addSyntheticMethod(String name,
int modifiers,
ClassNode returnType,
Parameter[] parameters,
ClassNode[] exceptions,
Statement code) {
MethodNode node = addMethod(name, modifiers|ACC_SYNTHETIC, returnType, parameters, exceptions, code);
node.setSynthetic(true);
return node;
}
public FieldNode addField(String name, int modifiers, ClassNode type, Expression initialValue) {
FieldNode node = new FieldNode(name, modifiers, type, redirect(), initialValue);
addField(node);
return node;
}
public FieldNode addFieldFirst(String name, int modifiers, ClassNode type, Expression initialValue) {
FieldNode node = new FieldNode(name, modifiers, type, redirect(), initialValue);
addFieldFirst(node);
return node;
}
public void addInterface(ClassNode type) {
ClassNode[] interfaces = getInterfaces();
for (ClassNode face : interfaces) {
if (face.equals(type)) return;
}
final int n = interfaces.length;
System.arraycopy(interfaces, 0, interfaces = new ClassNode[n + 1], 0, n);
interfaces[n] = type; // append interface
setInterfaces(interfaces);
}
public boolean equals(Object that) {
if (that == this) return true;
if (!(that instanceof ClassNode)) return false;
if (redirect != null) return redirect.equals(that);
if (componentType != null) return componentType.equals(((ClassNode) that).componentType);
return ((ClassNode) that).getText().equals(getText()); // arrays could be "T[]" or "[LT;"
}
public int hashCode() {
if (redirect != null) return redirect().hashCode();
return getName().hashCode();
}
public void addMixin(MixinNode mixin) {
// let's check if it already uses a mixin
MixinNode[] mixins = redirect().mixins;
boolean skip = false;
for (MixinNode existing : mixins) {
if (mixin.equals(existing)) {
skip = true;
break;
}
}
if (!skip) {
MixinNode[] newMixins = new MixinNode[mixins.length + 1];
System.arraycopy(mixins, 0, newMixins, 0, mixins.length);
newMixins[mixins.length] = mixin;
redirect().mixins = newMixins;
}
}
/**
* Finds a field matching the given name in this class.
*
* @param name the name of the field of interest
* @return the method matching the given name and parameters or null
*/
public FieldNode getDeclaredField(String name) {
if (redirect != null)
return redirect().getDeclaredField(name);
lazyClassInit();
return fieldIndex != null ? fieldIndex.get(name) : null;
}
/**
* Finds a field matching the given name in this class or a parent class.
*
* @param name the name of the field of interest
* @return the method matching the given name and parameters or null
*/
public FieldNode getField(String name) {
for (ClassNode node = this; node != null; node = node.getSuperClass()) {
FieldNode fn = node.getDeclaredField(name);
if (fn != null) return fn;
}
return null;
}
/**
* @return the field on the outer class or {@code null} if this is not an inner class
*/
public FieldNode getOuterField(final String name) {
if (redirect != null) {
return redirect.getOuterField(name);
}
return null;
}
public ClassNode getOuterClass() {
if (redirect != null) {
return redirect.getOuterClass();
}
return null;
}
public List getOuterClasses() {
ClassNode outer = getOuterClass();
if (outer == null) {
return Collections.emptyList();
}
List result = new LinkedList<>();
do {
result.add(outer);
} while ((outer = outer.getOuterClass()) != null);
return result;
}
/**
* Adds a statement to the object initializer.
*
* @param statements the statement to be added
*/
public void addObjectInitializerStatements(Statement statements) {
getObjectInitializerStatements().add(statements);
}
public List getObjectInitializerStatements() {
if (objectInitializers == null)
objectInitializers = new LinkedList();
return objectInitializers;
}
private MethodNode getOrAddStaticConstructorNode() {
MethodNode method = null;
List declaredMethods = getDeclaredMethods("");
if (declaredMethods.isEmpty()) {
method = addMethod("", ACC_STATIC, ClassHelper.VOID_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, new BlockStatement());
method.setSynthetic(true);
}
else {
method = declaredMethods.get(0);
}
return method;
}
public void addStaticInitializerStatements(List staticStatements, boolean fieldInit) {
MethodNode method = getOrAddStaticConstructorNode();
BlockStatement block = null;
Statement statement = method.getCode();
if (statement == null) {
block = new BlockStatement();
} else if (statement instanceof BlockStatement) {
block = (BlockStatement) statement;
} else {
block = new BlockStatement();
block.addStatement(statement);
}
// while anything inside a static initializer block is appended
// we don't want to append in the case we have a initialization
// expression of a static field. In that case we want to add
// before the other statements
if (!fieldInit) {
block.addStatements(staticStatements);
} else {
List blockStatements = block.getStatements();
staticStatements.addAll(blockStatements);
blockStatements.clear();
blockStatements.addAll(staticStatements);
}
}
public void positionStmtsAfterEnumInitStmts(List staticFieldStatements) {
MethodNode method = getOrAddStaticConstructorNode();
Statement statement = method.getCode();
if (statement instanceof BlockStatement) {
BlockStatement block = (BlockStatement) statement;
// add given statements for explicitly declared static fields just after enum-special fields
// are found - the $VALUES binary expression marks the end of such fields.
List blockStatements = block.getStatements();
ListIterator litr = blockStatements.listIterator();
while (litr.hasNext()) {
Statement stmt = litr.next();
if (stmt instanceof ExpressionStatement &&
((ExpressionStatement) stmt).getExpression() instanceof BinaryExpression) {
BinaryExpression bExp = (BinaryExpression) ((ExpressionStatement) stmt).getExpression();
if (bExp.getLeftExpression() instanceof FieldExpression) {
FieldExpression fExp = (FieldExpression) bExp.getLeftExpression();
if (fExp.getFieldName().equals("$VALUES")) {
for (Statement tmpStmt : staticFieldStatements) {
litr.add(tmpStmt);
}
}
}
}
}
}
}
/**
* This methods returns a list of all methods of the given name
* defined in the current class
* @return the method list
* @see #getMethods(String)
*/
public List getDeclaredMethods(String name) {
if (redirect != null)
return redirect().getDeclaredMethods(name);
lazyClassInit();
return methods.getNotNull(name);
}
/**
* This methods creates a list of all methods with this name of the
* current class and of all super classes
* @return the methods list
* @see #getDeclaredMethods(String)
*/
public List getMethods(String name) {
List answer = new ArrayList();
for (ClassNode node = this; node != null; node = node.getSuperClass()) {
answer.addAll(node.getDeclaredMethods(name));
}
return answer;
}
/**
* Finds a method matching the given name and parameters in this class.
*
* @return the method matching the given name and parameters or null
*/
public MethodNode getDeclaredMethod(String name, Parameter[] parameters) {
for (MethodNode method : getDeclaredMethods(name)) {
if (parametersEqual(method.getParameters(), parameters)) {
return method;
}
}
return null;
}
/**
* Finds a method matching the given name and parameters in this class
* or any parent class.
*
* @return the method matching the given name and parameters or null
*/
public MethodNode getMethod(String name, Parameter[] parameters) {
for (MethodNode method : getMethods(name)) {
if (parametersEqual(method.getParameters(), parameters)) {
return method;
}
}
return null;
}
/**
* @param type the ClassNode of interest
* @return true if this node is derived from the given ClassNode
*/
public boolean isDerivedFrom(ClassNode type) {
if (this.equals(ClassHelper.VOID_TYPE)) {
return type.equals(ClassHelper.VOID_TYPE);
}
if (type.equals(ClassHelper.OBJECT_TYPE)) {
return true;
}
for (ClassNode node = this; node != null; node = node.getSuperClass()) {
if (type.equals(node)) {
return true;
}
}
return false;
}
/**
* @return {@code true} if this type implements {@code GroovyObject}
*/
public boolean isDerivedFromGroovyObject() {
return implementsInterface(ClassHelper.GROOVY_OBJECT_TYPE);
}
/**
* @param classNode the class node for the interface
* @return {@code true} if this type implements the given interface
*/
public boolean implementsInterface(ClassNode classNode) {
for (ClassNode node = redirect(); node != null; node = node.getSuperClass()) {
if (node.declaresInterface(classNode)) {
return true;
}
}
return false;
}
/**
* @param classNode the class node for the interface
* @return {@code true} if this class declares that it implements the given
* interface or if one of its interfaces extends directly/indirectly the interface
*
* NOTE: Doesn't consider an interface to implement itself.
* I think this is intended to be called on ClassNodes representing
* classes, not interfaces.
*/
public boolean declaresInterface(ClassNode classNode) {
ClassNode[] interfaces = getInterfaces();
for (ClassNode cn : interfaces) {
if (cn.equals(classNode)) return true;
}
for (ClassNode cn : interfaces) {
if (cn.declaresInterface(classNode)) return true;
}
return false;
}
/**
* @return the {@code ClassNode} of the super class of this type
*/
public ClassNode getSuperClass() {
if (!lazyInitDone && !isResolved()) {
throw new GroovyBugError("ClassNode#getSuperClass for " + getName() + " called before class resolving");
}
ClassNode sn = redirect().getUnresolvedSuperClass();
if (sn != null) sn = sn.redirect();
return sn;
}
public ClassNode getUnresolvedSuperClass() {
return getUnresolvedSuperClass(true);
}
public ClassNode getUnresolvedSuperClass(boolean useRedirect) {
if (!useRedirect) return superClass;
if (redirect != null) return redirect().getUnresolvedSuperClass(true);
lazyClassInit();
return superClass;
}
public void setUnresolvedSuperClass(ClassNode sn) {
superClass = sn;
}
public ClassNode [] getUnresolvedInterfaces() {
return getUnresolvedInterfaces(true);
}
public ClassNode [] getUnresolvedInterfaces(boolean useRedirect) {
if (!useRedirect) return interfaces;
if (redirect != null) return redirect().getUnresolvedInterfaces(true);
lazyClassInit();
return interfaces;
}
public CompileUnit getCompileUnit() {
if (redirect != null) return redirect().getCompileUnit();
if (compileUnit == null && module != null) {
compileUnit = module.getUnit();
}
return compileUnit;
}
protected void setCompileUnit(CompileUnit cu) {
if (redirect != null) redirect().setCompileUnit(cu);
if (compileUnit != null) compileUnit = cu;
}
/**
* @return {@code true} if the two arrays are of the same size and have the same contents
* @deprecated
*/
@Deprecated
protected boolean parametersEqual(Parameter[] a, Parameter[] b) {
return ParameterUtils.parametersEqual(a, b);
}
public String getPackageName() {
int idx = getName().lastIndexOf('.');
if (idx > 0) {
return getName().substring(0, idx);
}
return null;
}
public String getNameWithoutPackage() {
int idx = getName().lastIndexOf('.');
if (idx > 0) {
return getName().substring(idx + 1);
}
return getName();
}
public void visitContents(GroovyClassVisitor visitor) {
// now let's visit the contents of the class
for (PropertyNode pn : getProperties()) {
visitor.visitProperty(pn);
}
for (FieldNode fn : getFields()) {
visitor.visitField(fn);
}
for (ConstructorNode cn : getDeclaredConstructors()) {
visitor.visitConstructor(cn);
}
for (MethodNode mn : getMethods()) {
visitor.visitMethod(mn);
}
}
public MethodNode getGetterMethod(String getterName) {
return getGetterMethod(getterName, true);
}
public MethodNode getGetterMethod(String getterName, boolean searchSuperClasses) {
MethodNode getterMethod = null;
boolean booleanReturnOnly = getterName.startsWith("is");
for (MethodNode method : getDeclaredMethods(getterName)) {
if (getterName.equals(method.getName())
&& method.getParameters().length == 0 && !method.isVoidMethod()
&& (!booleanReturnOnly || ClassHelper.Boolean_TYPE.equals(ClassHelper.getWrapper(method.getReturnType())))) {
// GROOVY-7363: There can be multiple matches for a getter returning a generic parameter type, due to
// the generation of a bridge method. The real getter is really the non-bridge, non-synthetic one as it
// has the most specific and exact return type of the two. Picking the bridge method results in loss of
// type information, as it down-casts the return type to the lower bound of the generic parameter.
if (getterMethod == null || getterMethod.isSynthetic()) {
getterMethod = method;
}
}
}
if (getterMethod != null) return getterMethod;
if (searchSuperClasses) {
ClassNode parent = getSuperClass();
if (parent != null) return parent.getGetterMethod(getterName);
}
return null;
}
public MethodNode getSetterMethod(String setterName) {
return getSetterMethod(setterName, true);
}
public MethodNode getSetterMethod(String setterName, boolean voidOnly) {
for (MethodNode method : getDeclaredMethods(setterName)) {
if (setterName.equals(method.getName())
&& method.getParameters().length == 1
&& (!voidOnly || method.isVoidMethod())) {
return method;
}
}
ClassNode parent = getSuperClass();
if (parent != null) return parent.getSetterMethod(setterName, voidOnly);
return null;
}
/**
* Is this class declared in a static method (such as a closure / inner class declared in a static method)
*/
public boolean isStaticClass() {
return redirect().staticClass;
}
public void setStaticClass(boolean staticClass) {
redirect().staticClass = staticClass;
}
/**
* @return {@code true} if this inner class or closure was declared inside a script body
*/
public boolean isScriptBody() {
return redirect().scriptBody;
}
public void setScriptBody(boolean scriptBody) {
redirect().scriptBody = scriptBody;
}
public boolean isScript() {
return redirect().script || isDerivedFrom(ClassHelper.SCRIPT_TYPE);
}
public void setScript(boolean script) {
redirect().script = script;
}
public String toString() {
return toString(true);
}
public String toString(boolean showRedirect) {
if (isArray()) {
return getComponentType().toString(showRedirect) + "[]";
}
boolean placeholder = isGenericsPlaceHolder();
StringBuilder ret = new StringBuilder(!placeholder ? getName() : getUnresolvedName());
GenericsType[] genericsTypes = getGenericsTypes();
if (!placeholder && genericsTypes != null && genericsTypes.length > 0) {
ret.append(" <");
for (int i = 0, n = genericsTypes.length; i < n; i += 1) {
if (i != 0) ret.append(", ");
ret.append(genericTypeAsString(genericsTypes[i]));
}
ret.append(">");
}
if (showRedirect && redirect != null) {
ret.append(" -> ").append(redirect);
}
return ret.toString();
}
/**
* Avoids a recursive definition of toString. The default {@code toString}
* in {@link GenericsType} calls {@code ClassNode.toString()}, which would
* call {@code GenericsType.toString()} without this method.
*/
private String genericTypeAsString(GenericsType genericsType) {
String name = genericsType.getName();
if (genericsType.getUpperBounds() != null) {
StringBuilder bounds = new StringBuilder();
ClassNode[] upperBounds = genericsType.getUpperBounds();
for (int i = 0, n = upperBounds.length; i < n; i += 1) {
if (i != 0) bounds.append(" & ");
bounds.append(toStringTerminal(upperBounds[i]));
}
return name + " extends " + bounds;
} else if (genericsType.getLowerBound() != null) {
return name + " super " + toStringTerminal(genericsType.getLowerBound());
} else {
return name;
}
}
private String toStringTerminal(ClassNode classNode) {
if (classNode.equals(this)) {
return classNode.getName();
} else {
return classNode.toString(false);
}
}
/**
* Determines if the type has a possibly-matching instance method with the given name and arguments.
*
* @param name the name of the method of interest
* @param arguments the arguments to match against
* @return true if a matching method was found
*/
public boolean hasPossibleMethod(final String name, final Expression arguments) {
int count;
if (arguments instanceof TupleExpression) {
// TODO: this won't strictly be true when using list expansion in argument calls
count = ((TupleExpression) arguments).getExpressions().size();
} else {
count = 0;
}
for (ClassNode cn = this; cn != null; cn = cn.getSuperClass()) {
for (MethodNode mn : cn.getDeclaredMethods(name)) {
if (!mn.isStatic() && hasCompatibleNumberOfArgs(mn, count)) {
return true;
}
}
for (ClassNode in : cn.getAllInterfaces()) {
for (MethodNode mn : in.getDeclaredMethods(name)) {
if (mn.isDefault() && hasCompatibleNumberOfArgs(mn, count)) {
return true;
}
}
}
}
return false;
}
public MethodNode tryFindPossibleMethod(final String name, final Expression arguments) {
if (!(arguments instanceof TupleExpression)) {
return null;
}
// TODO: this won't strictly be true when using list expansion in argument calls
TupleExpression args = (TupleExpression) arguments;
int count = args.getExpressions().size();
MethodNode res = null;
for (ClassNode cn = this; cn != null; cn = cn.getSuperClass()) {
for (MethodNode mn : cn.getDeclaredMethods(name)) {
if (hasCompatibleNumberOfArgs(mn, count)) {
boolean match = true;
for (int i = 0; i < count; i += 1) {
if (!hasCompatibleType(args, mn, i)) {
match = false;
break;
}
}
if (match) {
if (res == null) {
res = mn;
} else {
if (res.getParameters().length != count)
return null;
if (cn.equals(this))
return null;
match = true;
for (int i = 0; i != count; i += 1)
// prefer super method if it matches better
if (!hasExactMatchingCompatibleType(res, mn, i)) {
match = false;
break;
}
if (!match)
return null;
}
}
}
}
}
return res;
}
private boolean hasExactMatchingCompatibleType(MethodNode current, MethodNode newCandidate, int i) {
int lastParamIndex = newCandidate.getParameters().length - 1;
return (i <= lastParamIndex && current.getParameters()[i].getType().equals(newCandidate.getParameters()[i].getType()))
|| (i >= lastParamIndex && isPotentialVarArg(newCandidate, lastParamIndex) && current.getParameters()[i].getType().equals(newCandidate.getParameters()[lastParamIndex].getType().getComponentType()));
}
private boolean hasCompatibleType(TupleExpression args, MethodNode method, int i) {
int lastParamIndex = method.getParameters().length - 1;
return (i <= lastParamIndex && args.getExpression(i).getType().isDerivedFrom(method.getParameters()[i].getType()))
|| (isPotentialVarArg(method, lastParamIndex) && i >= lastParamIndex && args.getExpression(i).getType().isDerivedFrom(method.getParameters()[lastParamIndex].getType().componentType));
}
private boolean hasCompatibleNumberOfArgs(MethodNode method, int count) {
int lastParamIndex = method.getParameters().length - 1;
return method.getParameters().length == count || (isPotentialVarArg(method, lastParamIndex) && count >= lastParamIndex);
}
private boolean isPotentialVarArg(MethodNode newCandidate, int lastParamIndex) {
return lastParamIndex >= 0 && newCandidate.getParameters()[lastParamIndex].getType().isArray();
}
/**
* Checks if the given method has a possibly matching static method with the
* given name and arguments.
*
* @param name the name of the method of interest
* @param arguments the arguments to match against
* @return {@code true} if a matching method was found
*/
public boolean hasPossibleStaticMethod(String name, Expression arguments) {
return ClassNodeUtils.hasPossibleStaticMethod(this, name, arguments, false);
}
public boolean isInterface() {
return (getModifiers() & ACC_INTERFACE) != 0;
}
public boolean isAbstract() {
return (getModifiers() & ACC_ABSTRACT) != 0;
}
public boolean isResolved() {
if (clazz != null) return true;
if (redirect != null) return redirect.isResolved();
return componentType != null && componentType.isResolved();
}
public boolean isArray() {
return componentType != null;
}
public ClassNode getComponentType() {
return componentType;
}
/**
* Returns the concrete class this classnode relates to. However, this method
* is inherently unsafe as it may return null depending on the compile phase you are
* using. AST transformations should never use this method directly, but rather obtain
* a new class node using {@link #getPlainNodeReference()}.
* @return the class this classnode relates to. May return null.
*/
public Class getTypeClass() {
if (clazz != null) return clazz;
if (redirect != null) return redirect.getTypeClass();
ClassNode component = redirect().componentType;
if (component != null && component.isResolved()) {
return Array.newInstance(component.getTypeClass(), 0).getClass();
}
throw new GroovyBugError("ClassNode#getTypeClass for " + getName() + " called before the type class is set");
}
public boolean hasPackageName() {
return redirect().name.indexOf('.') > 0;
}
/**
* Marks if the current class uses annotations or not.
*/
public void setAnnotated(boolean flag) {
this.annotated = flag;
}
public boolean isAnnotated() {
return this.annotated;
}
public GenericsType asGenericsType() {
if (!isGenericsPlaceHolder()) {
return new GenericsType(this);
} else {
ClassNode upper = (redirect != null ? redirect : this);
return new GenericsType(this, new ClassNode[]{upper}, null);
}
}
public GenericsType[] getGenericsTypes() {
return genericsTypes;
}
public void setGenericsTypes(GenericsType[] genericsTypes) {
usesGenerics = usesGenerics || genericsTypes != null;
this.genericsTypes = genericsTypes;
}
public void setGenericsPlaceHolder(boolean b) {
usesGenerics = usesGenerics || b;
placeholder = b;
}
public boolean isGenericsPlaceHolder() {
return placeholder;
}
public boolean isUsingGenerics() {
return usesGenerics;
}
public void setUsingGenerics(boolean b) {
usesGenerics = b;
}
public ClassNode getPlainNodeReference() {
if (ClassHelper.isPrimitiveType(this)) return this;
ClassNode n = new ClassNode(name, modifiers, superClass, null, null);
n.isPrimaryNode = false;
n.setRedirect(redirect());
if (isArray()) {
n.componentType = redirect().getComponentType();
}
return n;
}
public boolean isAnnotationDefinition() {
return isInterface() && (getModifiers() & ACC_ANNOTATION) != 0;
}
public List getAnnotations() {
if (redirect != null)
return redirect.getAnnotations();
lazyClassInit();
return super.getAnnotations();
}
public List getAnnotations(ClassNode type) {
if (redirect != null)
return redirect.getAnnotations(type);
lazyClassInit();
return super.getAnnotations(type);
}
public void addTransform(Class transform, ASTNode node) {
GroovyASTTransformation annotation = transform.getAnnotation(GroovyASTTransformation.class);
if (annotation == null) return;
Set nodes = getTransformInstances().get(annotation.phase()).get(transform);
if (nodes == null) {
nodes = new LinkedHashSet();
getTransformInstances().get(annotation.phase()).put(transform, nodes);
}
nodes.add(node);
}
public Map, Set> getTransforms(CompilePhase phase) {
return getTransformInstances().get(phase);
}
public void renameField(String oldName, String newName) {
ClassNode r = redirect();
if (r.fieldIndex == null)
r.fieldIndex = new LinkedHashMap();
final Map index = r.fieldIndex;
index.put(newName, index.remove(oldName));
}
public void removeField(String oldName) {
ClassNode r = redirect();
if (r.fieldIndex == null)
r.fieldIndex = new LinkedHashMap();
final Map index = r.fieldIndex;
r.fields.remove(index.get(oldName));
index.remove(oldName);
}
public boolean isEnum() {
return (getModifiers() & ACC_ENUM) != 0;
}
/**
* @return iterator of inner classes defined inside this one
*/
public Iterator getInnerClasses() {
return (innerClasses == null ? Collections.emptyList() : innerClasses).iterator();
}
private Map, Set>> getTransformInstances() {
if (transformInstances == null) {
transformInstances = new EnumMap, Set>>(CompilePhase.class);
for (CompilePhase phase : CompilePhase.values()) {
transformInstances.put(phase, new LinkedHashMap, Set>());
}
}
return transformInstances;
}
@Override
public String getText() {
return getName();
}
}