/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.compiler.ast;
import org.eclipse.wst.jsdt.core.ast.IASTNode;
import org.eclipse.wst.jsdt.core.ast.IExpression;
import org.eclipse.wst.jsdt.core.ast.IFieldDeclaration;
import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor;
import org.eclipse.wst.jsdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext;
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo;
import org.eclipse.wst.jsdt.internal.compiler.lookup.ArrayBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.BaseTypeBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.Binding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.ClassScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.FieldBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.MethodScope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.Scope;
import org.eclipse.wst.jsdt.internal.compiler.lookup.SourceTypeBinding;
import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding;
public class FieldDeclaration extends AbstractVariableDeclaration implements IFieldDeclaration {
public FieldBinding binding;
// is in super public Javadoc javadoc;
//allows to retrieve both the "type" part of the declaration (part1)
//and also the part that decribe the name and the init and optionally
//some other dimension ! ....
//public int[] a, b[] = X, c ;
//for b that would give for
// - part1 : public int[]
// - part2 : b[] = X,
public int endPart1Position;
public int endPart2Position;
public FieldDeclaration() {
// for subtypes or conversion
}
public FieldDeclaration( char[] name, int sourceStart, int sourceEnd) {
this.name = name;
//due to some declaration like
// int x, y = 3, z , x ;
//the sourceStart and the sourceEnd is ONLY on the name
this.sourceStart = sourceStart;
this.sourceEnd = sourceEnd;
}
public FlowInfo analyseCode(MethodScope initializationScope, FlowContext flowContext, FlowInfo flowInfo) {
if (this.binding != null && !this.binding.isUsed()) {
if (this.binding.isPrivate() || (this.binding.declaringClass != null && this.binding.declaringClass.isLocalType())) {
if (!initializationScope.referenceCompilationUnit().compilationResult.hasSyntaxError) {
initializationScope.problemReporter().unusedPrivateField(this);
}
}
}
if (this.initialization != null) {
flowInfo =
this.initialization
.analyseCode(initializationScope, flowContext, flowInfo)
.unconditionalInits();
flowInfo.markAsDefinitelyAssigned(this.binding);
}
return flowInfo;
}
/**
* @see org.eclipse.wst.jsdt.internal.compiler.ast.AbstractVariableDeclaration#getKind()
*/
public int getKind() {
// return this.type == null ? ENUM_CONSTANT : FIELD;
return FIELD;
}
public boolean isStatic() {
if (this.binding != null)
return this.binding.isStatic();
return (this.modifiers & ClassFileConstants.AccStatic) != 0;
}
public StringBuffer printStatement(int indent, StringBuffer output) {
if (this.javadoc != null) {
this.javadoc.print(indent, output);
}
return super.printStatement(indent, output);
}
public void resolve(MethodScope initializationScope) {
// the two <constant = Constant.NotAConstant> could be regrouped into
// a single line but it is clearer to have two lines while the reason of their
// existence is not at all the same. See comment for the second one.
//--------------------------------------------------------
if ((this.bits & ASTNode.HasBeenResolved) != 0) return;
if (this.binding == null || !this.binding.isValidBinding()) return;
this.bits |= ASTNode.HasBeenResolved;
// check if field is hiding some variable - issue is that field binding already got inserted in scope
// thus must lookup separately in super type and outer context
ClassScope classScope = initializationScope.enclosingClassScope();
if (classScope != null) {
checkHiding: {
SourceTypeBinding declaringType = classScope.enclosingSourceType();
checkHidingSuperField: {
if (declaringType.superclass == null) break checkHidingSuperField;
Binding existingVariable = classScope.findField(declaringType.superclass, this.name, this, false /*do not resolve hidden field*/);
if (existingVariable == null) break checkHidingSuperField; // keep checking outer scenario
if (!existingVariable.isValidBinding()) break checkHidingSuperField; // keep checking outer scenario
if (existingVariable instanceof FieldBinding) {
FieldBinding existingField = (FieldBinding) existingVariable;
if (existingField.original() == this.binding) break checkHidingSuperField; // keep checking outer scenario
}
// collision with supertype field
initializationScope.problemReporter().fieldHiding(this, existingVariable);
break checkHiding; // already found a matching field
}
// only corner case is: lookup of outer field through static declaringType, which isn't detected by #getBinding as lookup starts
// from outer scope. Subsequent static contexts are detected for free.
Scope outerScope = classScope.parent;
if (outerScope.kind == Scope.COMPILATION_UNIT_SCOPE) break checkHiding;
Binding existingVariable = outerScope.getBinding(this.name, Binding.VARIABLE, this, false /*do not resolve hidden field*/);
if (existingVariable == null) break checkHiding;
if (!existingVariable.isValidBinding()) break checkHiding;
if (existingVariable == this.binding) break checkHiding;
if (existingVariable instanceof FieldBinding) {
FieldBinding existingField = (FieldBinding) existingVariable;
if (existingField.original() == this.binding) break checkHiding;
if (!existingField.isStatic() && declaringType.isStatic()) break checkHiding;
}
// collision with outer field or local variable
initializationScope.problemReporter().fieldHiding(this, existingVariable);
}
}
if (this.type != null ) { // enum constants have no declared type
this.type.resolvedType = this.binding.type; // update binding for type reference
}
FieldBinding previousField = initializationScope.initializedField;
int previousFieldID = initializationScope.lastVisibleFieldID;
try {
initializationScope.initializedField = this.binding;
initializationScope.lastVisibleFieldID = this.binding.id;
// resolveAnnotations(initializationScope, this.annotations, this.binding);
// the resolution of the initialization hasn't been done
if (this.initialization != null) {
TypeBinding fieldType = this.binding.type;
TypeBinding initializationType;
this.initialization.setExpectedType(fieldType); // needed in case of generic method invocation
if (this.initialization instanceof ArrayInitializer) {
if ((initializationType = this.initialization.resolveTypeExpecting(initializationScope, fieldType)) != null) {
((ArrayInitializer) this.initialization).binding = (ArrayBinding) initializationType;
}
} else if ((initializationType = this.initialization.resolveType(initializationScope)) != null) {
if (fieldType != initializationType) // must call before computeConversion() and typeMismatchError()
initializationScope.compilationUnitScope().recordTypeConversion(fieldType, initializationType);
if (this.initialization.isConstantValueOfTypeAssignableToType(initializationType, fieldType)
|| (fieldType.isBaseType() && BaseTypeBinding.isWidening(fieldType.id, initializationType.id))
|| initializationType.isCompatibleWith(fieldType)) {
} else if (initializationScope.isBoxingCompatibleWith(initializationType, fieldType)
|| (initializationType.isBaseType() // narrowing then boxing ?
&& initializationScope.compilerOptions().sourceLevel >= ClassFileConstants.JDK1_5 // autoboxing
&& !fieldType.isBaseType()
&& initialization.isConstantValueOfTypeAssignableToType(initializationType, initializationScope.environment().computeBoxingType(fieldType)))) {
} else {
initializationScope.problemReporter().typeMismatchError(initializationType, fieldType, this);
}
}
// check for assignment with no effect
if (this.binding == Assignment.getDirectBinding(this.initialization)) {
initializationScope.problemReporter().assignmentHasNoEffect(this, this.name);
}
}
// Resolve Javadoc comment if one is present
if (this.javadoc != null) {
/*
if (classScope != null) {
this.javadoc.resolve(classScope);
}
*/
this.javadoc.resolve(initializationScope);
} else if (this.binding.declaringClass != null && !this.binding.declaringClass.isLocalType()) {
initializationScope.problemReporter().javadocMissing(this.sourceStart, this.sourceEnd, this.binding.modifiers);
}
} finally {
initializationScope.initializedField = previousField;
initializationScope.lastVisibleFieldID = previousFieldID;
}
}
public void traverse(ASTVisitor visitor, MethodScope scope) {
if (visitor.visit(this, scope)) {
if (this.javadoc != null) {
this.javadoc.traverse(visitor, scope);
}
if (this.type != null) {
this.type.traverse(visitor, scope);
}
if (this.initialization != null)
this.initialization.traverse(visitor, scope);
}
visitor.endVisit(this, scope);
}
public int getASTType() {
return IASTNode.FIELD_DECLARATION;
}
public IExpression getInitialization()
{
return this.initialization;
}
}