| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.ast; |
| |
| import org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.eclipse.jdt.internal.compiler.impl.*; |
| import org.eclipse.jdt.internal.compiler.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| |
| public class FieldDeclaration extends AbstractVariableDeclaration { |
| public FieldBinding binding; |
| boolean hasBeenResolved = false; |
| 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.isPrivate() && !this.binding.isPrivateUsed()) { |
| if (!initializationScope.referenceCompilationUnit().compilationResult.hasSyntaxError()) { |
| initializationScope.problemReporter().unusedPrivateField(this); |
| } |
| } |
| // cannot define static non-constant field inside nested class |
| if (this.binding != null |
| && this.binding.isValidBinding() |
| && this.binding.isStatic() |
| && this.binding.constant == NotAConstant |
| && this.binding.declaringClass.isNestedType() |
| && this.binding.declaringClass.isClass() |
| && !this.binding.declaringClass.isStatic()) { |
| initializationScope.problemReporter().unexpectedStaticModifierForField( |
| (SourceTypeBinding) this.binding.declaringClass, |
| this); |
| } |
| |
| if (this.initialization != null) { |
| flowInfo = |
| this.initialization |
| .analyseCode(initializationScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| flowInfo.markAsDefinitelyAssigned(this.binding); |
| } |
| return flowInfo; |
| } |
| |
| /** |
| * Code generation for a field declaration: |
| * standard assignment to a field |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream |
| */ |
| public void generateCode(BlockScope currentScope, CodeStream codeStream) { |
| |
| if ((this.bits & IsReachableMASK) == 0) { |
| return; |
| } |
| // do not generate initialization code if final and static (constant is then |
| // recorded inside the field itself). |
| int pc = codeStream.position; |
| boolean isStatic; |
| if (this.initialization != null |
| && !((isStatic = this.binding.isStatic()) && this.binding.constant != NotAConstant)) { |
| // non-static field, need receiver |
| if (!isStatic) |
| codeStream.aload_0(); |
| // generate initialization value |
| this.initialization.generateCode(currentScope, codeStream, true); |
| // store into field |
| if (isStatic) { |
| codeStream.putstatic(this.binding); |
| } else { |
| codeStream.putfield(this.binding); |
| } |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| |
| public boolean isField() { |
| |
| return true; |
| } |
| |
| public boolean isStatic() { |
| |
| if (this.binding != null) |
| return this.binding.isStatic(); |
| return (this.modifiers & AccStatic) != 0; |
| } |
| |
| 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.hasBeenResolved && this.binding != null && this.binding.isValidBinding()) { |
| |
| this.hasBeenResolved = true; |
| |
| // 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) { |
| SourceTypeBinding declaringType = classScope.enclosingSourceType(); |
| boolean checkLocal = true; |
| if (declaringType.superclass != null) { |
| Binding existingVariable = classScope.findField(declaringType.superclass, this.name, this, false /*do not resolve hidden field*/); |
| if (existingVariable != null && existingVariable.isValidBinding()){ |
| initializationScope.problemReporter().fieldHiding(this, existingVariable); |
| checkLocal = false; // already found a matching field |
| } |
| } |
| if (checkLocal) { |
| Scope outerScope = classScope.parent; |
| // 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. |
| Binding existingVariable = outerScope.getBinding(this.name, BindingIds.VARIABLE, this, false /*do not resolve hidden field*/); |
| if (existingVariable != null && existingVariable.isValidBinding() |
| && (!(existingVariable instanceof FieldBinding) |
| || ((FieldBinding) existingVariable).isStatic() |
| || !declaringType.isStatic())) { |
| initializationScope.problemReporter().fieldHiding(this, existingVariable); |
| } |
| } |
| } |
| |
| 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; |
| |
| // the resolution of the initialization hasn't been done |
| if (this.initialization == null) { |
| this.binding.constant = Constant.NotAConstant; |
| } else { |
| // break dead-lock cycles by forcing constant to NotAConstant |
| this.binding.constant = Constant.NotAConstant; |
| |
| TypeBinding fieldType = this.binding.type; |
| TypeBinding initializationType; |
| |
| if (this.initialization instanceof ArrayInitializer) { |
| |
| if ((initializationType = this.initialization.resolveTypeExpecting(initializationScope, fieldType)) != null) { |
| ((ArrayInitializer) this.initialization).binding = (ArrayBinding) initializationType; |
| this.initialization.computeConversion(initializationScope, fieldType, initializationType); |
| } |
| } else if ((initializationType = this.initialization.resolveType(initializationScope)) != null) { |
| |
| if (this.initialization.isConstantValueOfTypeAssignableToType(initializationType, fieldType) |
| || (fieldType.isBaseType() && BaseTypeBinding.isWidening(fieldType.id, initializationType.id)) |
| || initializationType.isCompatibleWith(fieldType)) { |
| this.initialization.computeConversion(initializationScope, fieldType, initializationType); |
| if (initializationType.isRawType() && (fieldType.isParameterizedType() || fieldType.isGenericType())) { |
| initializationScope.problemReporter().unsafeRawAssignment(this.initialization, initializationType, fieldType); |
| } |
| } else { |
| initializationScope.problemReporter().typeMismatchError(initializationType, fieldType, this); |
| } |
| if (this.binding.isFinal()){ // cast from constant actual type to variable type |
| this.binding.constant = |
| this.initialization.constant.castTo( |
| (this.binding.type.id << 4) + this.initialization.constant.typeID()); |
| } |
| } else { |
| this.binding.constant = NotAConstant; |
| } |
| } |
| // 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 != null && 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; |
| if (this.binding.constant == null) |
| this.binding.constant = Constant.NotAConstant; |
| } |
| } |
| } |
| |
| public void traverse(ASTVisitor visitor, MethodScope scope) { |
| |
| if (visitor.visit(this, scope)) { |
| this.type.traverse(visitor, scope); |
| if (this.initialization != null) |
| this.initialization.traverse(visitor, scope); |
| } |
| visitor.endVisit(this, scope); |
| } |
| } |
