| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.jdt.internal.compiler.ast; |
| |
| import org.eclipse.jdt.internal.compiler.ASTVisitor; |
| import org.eclipse.jdt.internal.compiler.impl.*; |
| import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants; |
| import org.eclipse.jdt.internal.compiler.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| import org.eclipse.jdt.internal.compiler.problem.ProblemSeverities; |
| |
| public class QualifiedNameReference extends NameReference { |
| |
| public char[][] tokens; |
| public long[] sourcePositions; |
| public FieldBinding[] otherBindings, otherCodegenBindings; |
| int[] otherDepths; |
| public int indexOfFirstFieldBinding;//points (into tokens) for the first token that corresponds to first FieldBinding |
| SyntheticMethodBinding syntheticWriteAccessor; |
| SyntheticMethodBinding[] syntheticReadAccessors; |
| public TypeBinding genericCast; |
| public TypeBinding[] otherGenericCasts; |
| |
| public QualifiedNameReference( |
| char[][] sources, |
| long[] positions, |
| int sourceStart, |
| int sourceEnd) { |
| super(); |
| this.tokens = sources; |
| this.sourcePositions = positions; |
| this.sourceStart = sourceStart; |
| this.sourceEnd = sourceEnd; |
| } |
| |
| public FlowInfo analyseAssignment( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo, |
| Assignment assignment, |
| boolean isCompound) { |
| |
| // determine the rank until which we now we do not need any actual value for the field access |
| int otherBindingsCount = otherBindings == null ? 0 : otherBindings.length; |
| boolean needValue = otherBindingsCount == 0 || !this.otherBindings[0].isStatic(); |
| FieldBinding lastFieldBinding = null; |
| switch (bits & RestrictiveFlagMASK) { |
| case Binding.FIELD : // reading a field |
| lastFieldBinding = (FieldBinding) binding; |
| if (needValue) { |
| manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, this.actualReceiverType, 0, flowInfo); |
| } // check if final blank field |
| if (lastFieldBinding.isBlankFinal() |
| && this.otherBindings != null // the last field binding is only assigned |
| && currentScope.allowBlankFinalFieldAssignment(lastFieldBinding)) { |
| if (!flowInfo.isDefinitelyAssigned(lastFieldBinding)) { |
| currentScope.problemReporter().uninitializedBlankFinalField( |
| lastFieldBinding, |
| this); |
| } |
| } |
| break; |
| case Binding.LOCAL : |
| // first binding is a local variable |
| LocalVariableBinding localBinding; |
| if (!flowInfo |
| .isDefinitelyAssigned(localBinding = (LocalVariableBinding) binding)) { |
| currentScope.problemReporter().uninitializedLocalVariable(localBinding, this); |
| } |
| if (flowInfo.isReachable()) { |
| localBinding.useFlag = LocalVariableBinding.USED; |
| } else if (localBinding.useFlag == LocalVariableBinding.UNUSED) { |
| localBinding.useFlag = LocalVariableBinding.FAKE_USED; |
| } |
| this.checkNullStatus(currentScope, flowContext, flowInfo, FlowInfo.NON_NULL); |
| } |
| |
| if (needValue) { |
| manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo); |
| // only for first binding |
| } |
| // all intermediate field accesses are read accesses |
| if (otherBindings != null) { |
| boolean complyTo14 = currentScope.environment().options.complianceLevel >= ClassFileConstants.JDK1_4; |
| for (int i = 0; i < otherBindingsCount-1; i++) { |
| lastFieldBinding = otherBindings[i]; |
| needValue = !otherBindings[i+1].isStatic(); |
| if (needValue || complyTo14) { |
| manageSyntheticAccessIfNecessary( |
| currentScope, |
| lastFieldBinding, |
| i == 0 |
| ? ((VariableBinding)binding).type |
| : otherBindings[i-1].type, |
| i + 1, |
| flowInfo); |
| } |
| } |
| lastFieldBinding = otherBindings[otherBindingsCount-1]; |
| } |
| |
| if (isCompound) { |
| if (binding == lastFieldBinding |
| && lastFieldBinding.isBlankFinal() |
| && currentScope.allowBlankFinalFieldAssignment(lastFieldBinding) |
| && (!flowInfo.isDefinitelyAssigned(lastFieldBinding))) { |
| currentScope.problemReporter().uninitializedBlankFinalField( |
| lastFieldBinding, |
| this); |
| } |
| TypeBinding lastReceiverType; |
| if (lastFieldBinding == binding){ |
| lastReceiverType = this.actualReceiverType; |
| } else if (otherBindingsCount == 1){ |
| lastReceiverType = ((VariableBinding)this.binding).type; |
| } else { |
| lastReceiverType = this.otherBindings[otherBindingsCount-2].type; |
| } |
| manageSyntheticAccessIfNecessary( |
| currentScope, |
| lastFieldBinding, |
| lastReceiverType, |
| lastFieldBinding == binding |
| ? 0 |
| : otherBindingsCount, |
| flowInfo); |
| } |
| |
| if (assignment.expression != null) { |
| flowInfo = |
| assignment |
| .expression |
| .analyseCode(currentScope, flowContext, flowInfo) |
| .unconditionalInits(); |
| } |
| |
| // the last field access is a write access |
| if (lastFieldBinding.isFinal()) { |
| // in a context where it can be assigned? |
| if (lastFieldBinding.isBlankFinal() |
| && !isCompound |
| && currentScope.allowBlankFinalFieldAssignment(lastFieldBinding) |
| && indexOfFirstFieldBinding == 1) { |
| if (flowInfo.isPotentiallyAssigned(lastFieldBinding)) { |
| currentScope.problemReporter().duplicateInitializationOfBlankFinalField(lastFieldBinding, this); |
| } else { |
| flowContext.recordSettingFinal(lastFieldBinding, this, flowInfo); |
| } |
| flowInfo.markAsDefinitelyAssigned(lastFieldBinding); |
| } else { |
| currentScope.problemReporter().cannotAssignToFinalField(lastFieldBinding, this); |
| if (currentScope.allowBlankFinalFieldAssignment(lastFieldBinding)) { // pretend it got assigned |
| flowInfo.markAsDefinitelyAssigned(lastFieldBinding); |
| } |
| } |
| } |
| // equivalent to valuesRequired[maxOtherBindings] |
| TypeBinding lastReceiverType; |
| if (lastFieldBinding == binding){ |
| lastReceiverType = this.actualReceiverType; |
| } else if (otherBindingsCount == 1){ |
| lastReceiverType = ((VariableBinding)this.binding).type; |
| } else { |
| lastReceiverType = this.otherBindings[otherBindingsCount-2].type; |
| } |
| manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, lastReceiverType, -1 /*write-access*/, flowInfo); |
| |
| return flowInfo; |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo) { |
| |
| return analyseCode(currentScope, flowContext, flowInfo, true); |
| } |
| |
| public FlowInfo analyseCode( |
| BlockScope currentScope, |
| FlowContext flowContext, |
| FlowInfo flowInfo, |
| boolean valueRequired) { |
| |
| // determine the rank until which we now we do not need any actual value for the field access |
| int otherBindingsCount = otherBindings == null ? 0 : otherBindings.length; |
| |
| boolean needValue = otherBindingsCount == 0 ? valueRequired : !this.otherBindings[0].isStatic(); |
| switch (bits & RestrictiveFlagMASK) { |
| case Binding.FIELD : // reading a field |
| if (needValue) { |
| manageSyntheticAccessIfNecessary(currentScope, (FieldBinding) binding, this.actualReceiverType, 0, flowInfo); |
| } |
| // check if reading a final blank field |
| FieldBinding fieldBinding; |
| if ((fieldBinding = (FieldBinding) binding).isBlankFinal() |
| && (indexOfFirstFieldBinding == 1) |
| // was an implicit reference to the first field binding |
| && currentScope.allowBlankFinalFieldAssignment(fieldBinding) |
| && (!flowInfo.isDefinitelyAssigned(fieldBinding))) { |
| currentScope.problemReporter().uninitializedBlankFinalField(fieldBinding, this); |
| } |
| break; |
| case Binding.LOCAL : // reading a local variable |
| LocalVariableBinding localBinding; |
| if (!flowInfo |
| .isDefinitelyAssigned(localBinding = (LocalVariableBinding) binding)) { |
| currentScope.problemReporter().uninitializedLocalVariable(localBinding, this); |
| } |
| if (flowInfo.isReachable()) { |
| localBinding.useFlag = LocalVariableBinding.USED; |
| } else if (localBinding.useFlag == LocalVariableBinding.UNUSED) { |
| localBinding.useFlag = LocalVariableBinding.FAKE_USED; |
| } |
| this.checkNullStatus(currentScope, flowContext, flowInfo, FlowInfo.NON_NULL); |
| } |
| if (needValue) { |
| manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo); |
| // only for first binding |
| } |
| if (otherBindings != null) { |
| boolean complyTo14 = currentScope.environment().options.complianceLevel >= ClassFileConstants.JDK1_4; |
| for (int i = 0; i < otherBindingsCount; i++) { |
| needValue = i < otherBindingsCount-1 ? !otherBindings[i+1].isStatic() : valueRequired; |
| if (needValue || complyTo14) { |
| TypeBinding lastReceiverType = getGenericCast(i); |
| if (lastReceiverType == null) { |
| if (i == 0) { |
| lastReceiverType = ((VariableBinding)binding).type; |
| } else { |
| lastReceiverType = otherBindings[i-1].type; |
| } |
| } |
| manageSyntheticAccessIfNecessary( |
| currentScope, |
| otherBindings[i], |
| lastReceiverType, |
| i + 1, |
| flowInfo); |
| } |
| } |
| } |
| return flowInfo; |
| } |
| /** |
| * Check and/or redirect the field access to the delegate receiver if any |
| */ |
| public TypeBinding checkFieldAccess(BlockScope scope) { |
| // check for forward references |
| FieldBinding fieldBinding = (FieldBinding) binding; |
| MethodScope methodScope = scope.methodScope(); |
| if (methodScope.enclosingSourceType() == fieldBinding.declaringClass |
| && methodScope.lastVisibleFieldID >= 0 |
| && fieldBinding.id >= methodScope.lastVisibleFieldID) { |
| if ((!fieldBinding.isStatic() || methodScope.isStatic) |
| && this.indexOfFirstFieldBinding == 1) |
| scope.problemReporter().forwardReference(this, 0, scope.enclosingSourceType()); |
| } |
| bits &= ~RestrictiveFlagMASK; // clear bits |
| bits |= Binding.FIELD; |
| return getOtherFieldBindings(scope); |
| } |
| |
| /** |
| * @see org.eclipse.jdt.internal.compiler.ast.Expression#computeConversion(org.eclipse.jdt.internal.compiler.lookup.Scope, org.eclipse.jdt.internal.compiler.lookup.TypeBinding, org.eclipse.jdt.internal.compiler.lookup.TypeBinding) |
| */ |
| public void computeConversion(Scope scope, TypeBinding runtimeTimeType, TypeBinding compileTimeType) { |
| if (runtimeTimeType == null || compileTimeType == null) |
| return; |
| // set the generic cast after the fact, once the type expectation is fully known (no need for strict cast) |
| FieldBinding field = null; |
| int length = this.otherBindings == null ? 0 : this.otherBindings.length; |
| if (length == 0) { |
| if ((this.bits & Binding.FIELD) != 0 && this.binding != null && this.binding.isValidBinding()) { |
| field = (FieldBinding) this.binding; |
| } |
| } else { |
| field = this.otherBindings[length-1]; |
| } |
| if (field != null) { |
| FieldBinding originalBinding = field.original(); |
| if (originalBinding != field) { |
| // extra cast needed if method return type has type variable |
| if ((originalBinding.type.tagBits & TagBits.HasTypeVariable) != 0 && runtimeTimeType.id != T_JavaLangObject) { |
| TypeBinding targetType = (!compileTimeType.isBaseType() && runtimeTimeType.isBaseType()) |
| ? compileTimeType // unboxing: checkcast before conversion |
| : runtimeTimeType; |
| setGenericCast(length,originalBinding.type.genericCast(targetType)); |
| } |
| } |
| } |
| super.computeConversion(scope, runtimeTimeType, compileTimeType); |
| } |
| |
| public void generateAssignment( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| Assignment assignment, |
| boolean valueRequired) { |
| |
| int pc = codeStream.position; |
| FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream); |
| codeStream.recordPositionsFrom(pc , this.sourceStart); |
| assignment.expression.generateCode(currentScope, codeStream, true); |
| fieldStore(codeStream, lastFieldBinding, syntheticWriteAccessor, valueRequired); |
| // equivalent to valuesRequired[maxOtherBindings] |
| if (valueRequired) { |
| codeStream.generateImplicitConversion(assignment.implicitConversion); |
| } |
| } |
| public void generateCode( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| boolean valueRequired) { |
| |
| int pc = codeStream.position; |
| if (constant != NotAConstant) { |
| if (valueRequired) { |
| codeStream.generateConstant(constant, implicitConversion); |
| } |
| } else { |
| FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream); |
| if (lastFieldBinding != null) { |
| boolean isStatic = lastFieldBinding.isStatic(); |
| if (lastFieldBinding.isConstantValue()) { |
| if (!isStatic){ |
| codeStream.invokeObjectGetClass(); |
| codeStream.pop(); |
| } |
| if (valueRequired) { // inline the last field constant |
| codeStream.generateConstant(lastFieldBinding.constant(), implicitConversion); |
| } |
| } else { |
| if (valueRequired || currentScope.environment().options.complianceLevel >= ClassFileConstants.JDK1_4) { |
| if (lastFieldBinding.declaringClass == null) { // array length |
| codeStream.arraylength(); |
| if (valueRequired) { |
| codeStream.generateImplicitConversion(implicitConversion); |
| } else { |
| // could occur if !valueRequired but compliance >= 1.4 |
| codeStream.pop(); |
| } |
| } else { |
| SyntheticMethodBinding accessor = |
| syntheticReadAccessors == null |
| ? null |
| : syntheticReadAccessors[syntheticReadAccessors.length - 1]; |
| if (accessor == null) { |
| if (isStatic) { |
| codeStream.getstatic(lastFieldBinding); |
| } else { |
| codeStream.getfield(lastFieldBinding); |
| } |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| TypeBinding requiredGenericCast = getGenericCast(this.otherCodegenBindings == null ? 0 : this.otherCodegenBindings.length); |
| if (valueRequired) { |
| if (requiredGenericCast != null) codeStream.checkcast(requiredGenericCast); |
| codeStream.generateImplicitConversion(implicitConversion); |
| } else { |
| // could occur if !valueRequired but compliance >= 1.4 |
| switch (lastFieldBinding.type.id) { |
| case T_long : |
| case T_double : |
| codeStream.pop2(); |
| break; |
| default : |
| codeStream.pop(); |
| } |
| } |
| } |
| } else { |
| if (!isStatic){ |
| codeStream.invokeObjectGetClass(); // perform null check |
| codeStream.pop(); |
| } |
| } |
| } |
| } |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| public void generateCompoundAssignment( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| Expression expression, |
| int operator, |
| int assignmentImplicitConversion, |
| boolean valueRequired) { |
| |
| FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream); |
| SyntheticMethodBinding accessor = |
| syntheticReadAccessors == null |
| ? null |
| : syntheticReadAccessors[syntheticReadAccessors.length - 1]; |
| if (lastFieldBinding.isStatic()) { |
| if (accessor == null) { |
| codeStream.getstatic(lastFieldBinding); |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| } else { |
| codeStream.dup(); |
| if (accessor == null) { |
| codeStream.getfield(lastFieldBinding); |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| } |
| // the last field access is a write access |
| // perform the actual compound operation |
| int operationTypeID; |
| switch(operationTypeID = (implicitConversion & IMPLICIT_CONVERSION_MASK) >> 4) { |
| case T_JavaLangString : |
| case T_JavaLangObject : |
| case T_undefined : |
| codeStream.generateStringConcatenationAppend(currentScope, null, expression); |
| break; |
| default : |
| // promote the array reference to the suitable operation type |
| codeStream.generateImplicitConversion(implicitConversion); |
| // generate the increment value (will by itself be promoted to the operation value) |
| if (expression == IntLiteral.One) { // prefix operation |
| codeStream.generateConstant(expression.constant, implicitConversion); |
| } else { |
| expression.generateCode(currentScope, codeStream, true); |
| } |
| // perform the operation |
| codeStream.sendOperator(operator, operationTypeID); |
| // cast the value back to the array reference type |
| codeStream.generateImplicitConversion(assignmentImplicitConversion); |
| } |
| // actual assignment |
| fieldStore(codeStream, lastFieldBinding, syntheticWriteAccessor, valueRequired); |
| // equivalent to valuesRequired[maxOtherBindings] |
| } |
| public void generatePostIncrement( |
| BlockScope currentScope, |
| CodeStream codeStream, |
| CompoundAssignment postIncrement, |
| boolean valueRequired) { |
| |
| FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream); |
| SyntheticMethodBinding accessor = |
| syntheticReadAccessors == null |
| ? null |
| : syntheticReadAccessors[syntheticReadAccessors.length - 1]; |
| if (lastFieldBinding.isStatic()) { |
| if (accessor == null) { |
| codeStream.getstatic(lastFieldBinding); |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| } else { |
| codeStream.dup(); |
| if (accessor == null) { |
| codeStream.getfield(lastFieldBinding); |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| } |
| // duplicate the old field value |
| if (valueRequired) { |
| if (lastFieldBinding.isStatic()) { |
| if ((lastFieldBinding.type == LongBinding) |
| || (lastFieldBinding.type == DoubleBinding)) { |
| codeStream.dup2(); |
| } else { |
| codeStream.dup(); |
| } |
| } else { // Stack: [owner][old field value] ---> [old field value][owner][old field value] |
| if ((lastFieldBinding.type == LongBinding) |
| || (lastFieldBinding.type == DoubleBinding)) { |
| codeStream.dup2_x1(); |
| } else { |
| codeStream.dup_x1(); |
| } |
| } |
| } |
| codeStream.generateImplicitConversion(implicitConversion); |
| codeStream.generateConstant( |
| postIncrement.expression.constant, |
| implicitConversion); |
| codeStream.sendOperator(postIncrement.operator, this.implicitConversion & COMPILE_TYPE_MASK); |
| codeStream.generateImplicitConversion( |
| postIncrement.assignmentImplicitConversion); |
| fieldStore(codeStream, lastFieldBinding, syntheticWriteAccessor, false); |
| } |
| /* |
| * Generate code for all bindings (local and fields) excluding the last one, which may then be generated code |
| * for a read or write access. |
| */ |
| public FieldBinding generateReadSequence(BlockScope currentScope, CodeStream codeStream) { |
| |
| // determine the rank until which we now we do not need any actual value for the field access |
| int otherBindingsCount = this.otherCodegenBindings == null ? 0 : otherCodegenBindings.length; |
| boolean needValue = otherBindingsCount == 0 || !this.otherBindings[0].isStatic(); |
| FieldBinding lastFieldBinding = null; |
| TypeBinding lastGenericCast = null; |
| boolean complyTo14 = currentScope.environment().options.complianceLevel >= ClassFileConstants.JDK1_4; |
| |
| switch (bits & RestrictiveFlagMASK) { |
| case Binding.FIELD : |
| lastFieldBinding = (FieldBinding) this.codegenBinding; |
| lastGenericCast = this.genericCast; |
| // if first field is actually constant, we can inline it |
| if (lastFieldBinding.isConstantValue()) { |
| break; |
| } |
| if ((needValue || complyTo14) && !lastFieldBinding.isStatic()) { |
| int pc = codeStream.position; |
| if ((bits & DepthMASK) != 0) { |
| ReferenceBinding targetType = currentScope.enclosingSourceType().enclosingTypeAt((bits & DepthMASK) >> DepthSHIFT); |
| Object[] emulationPath = currentScope.getEmulationPath(targetType, true /*only exact match*/, false/*consider enclosing arg*/); |
| codeStream.generateOuterAccess(emulationPath, this, targetType, currentScope); |
| } else { |
| generateReceiver(codeStream); |
| } |
| codeStream.recordPositionsFrom(pc, this.sourceStart); |
| } |
| break; |
| case Binding.LOCAL : // reading the first local variable |
| if (!needValue) break; // no value needed |
| LocalVariableBinding localBinding = (LocalVariableBinding) this.codegenBinding; |
| // regular local variable read |
| if (localBinding.isConstantValue()) { |
| codeStream.generateConstant(localBinding.constant(), 0); |
| // no implicit conversion |
| } else { |
| // outer local? |
| if ((bits & DepthMASK) != 0) { |
| // outer local can be reached either through a synthetic arg or a synthetic field |
| VariableBinding[] path = currentScope.getEmulationPath(localBinding); |
| codeStream.generateOuterAccess(path, this, localBinding, currentScope); |
| } else { |
| codeStream.load(localBinding); |
| } |
| } |
| } |
| |
| // all intermediate field accesses are read accesses |
| // only the last field binding is a write access |
| if (this.otherCodegenBindings != null) { |
| for (int i = 0; i < otherBindingsCount; i++) { |
| FieldBinding nextField = this.otherCodegenBindings[i]; |
| TypeBinding nextGenericCast = this.otherGenericCasts == null ? null : this.otherGenericCasts[i]; |
| if (lastFieldBinding != null) { |
| needValue = !nextField.isStatic(); |
| if (lastFieldBinding.isConstantValue()) { |
| if (lastFieldBinding != this.codegenBinding && !lastFieldBinding.isStatic()) { |
| codeStream.invokeObjectGetClass(); // perform null check |
| codeStream.pop(); |
| } |
| if (needValue) { |
| codeStream.generateConstant(lastFieldBinding.constant(), 0); |
| } |
| } else { |
| if (needValue || complyTo14) { |
| MethodBinding accessor = syntheticReadAccessors == null ? null : syntheticReadAccessors[i]; |
| if (accessor == null) { |
| if (lastFieldBinding.isStatic()) { |
| codeStream.getstatic(lastFieldBinding); |
| } else { |
| codeStream.getfield(lastFieldBinding); |
| } |
| } else { |
| codeStream.invokestatic(accessor); |
| } |
| if (needValue) { |
| if (lastGenericCast != null) codeStream.checkcast(lastGenericCast); |
| } else { |
| codeStream.pop(); |
| } |
| } else { |
| if (this.codegenBinding != lastFieldBinding && !lastFieldBinding.isStatic()){ |
| codeStream.invokeObjectGetClass(); // perform null check |
| codeStream.pop(); |
| } |
| } |
| } |
| } |
| lastFieldBinding = nextField; |
| lastGenericCast = nextGenericCast; |
| } |
| } |
| return lastFieldBinding; |
| } |
| public void generateReceiver(CodeStream codeStream) { |
| codeStream.aload_0(); |
| } |
| |
| /** |
| * @see org.eclipse.jdt.internal.compiler.lookup.InvocationSite#genericTypeArguments() |
| */ |
| public TypeBinding[] genericTypeArguments() { |
| return null; |
| } |
| |
| // get the matching codegenBinding |
| protected FieldBinding getCodegenBinding(int index) { |
| if (index == 0){ |
| return (FieldBinding)this.codegenBinding; |
| } else { |
| return this.otherCodegenBindings[index-1]; |
| } |
| } |
| |
| // get the matching generic cast |
| protected TypeBinding getGenericCast(int index) { |
| if (index == 0){ |
| return this.genericCast; |
| } else { |
| if (this.otherGenericCasts == null) return null; |
| return this.otherGenericCasts[index-1]; |
| } |
| } |
| |
| public TypeBinding getOtherFieldBindings(BlockScope scope) { |
| // At this point restrictiveFlag may ONLY have two potential value : FIELD LOCAL (i.e cast <<(VariableBinding) binding>> is valid) |
| int length = tokens.length; |
| FieldBinding field; |
| if ((bits & Binding.FIELD) != 0) { |
| field = (FieldBinding) this.binding; |
| if (!field.isStatic()) { |
| //must check for the static status.... |
| if (indexOfFirstFieldBinding > 1 //accessing to a field using a type as "receiver" is allowed only with static field |
| || scope.methodScope().isStatic) { // the field is the first token of the qualified reference.... |
| scope.problemReporter().staticFieldAccessToNonStaticVariable(this, field); |
| return null; |
| } |
| } else { |
| // indirect static reference ? |
| if (indexOfFirstFieldBinding > 1 |
| && field.declaringClass != actualReceiverType) { |
| scope.problemReporter().indirectAccessToStaticField(this, field); |
| } |
| } |
| // only last field is actually a write access if any |
| if (isFieldUseDeprecated(field, scope, (this.bits & IsStrictlyAssignedMASK) !=0 && indexOfFirstFieldBinding == length)) |
| scope.problemReporter().deprecatedField(field, this); |
| } else { |
| field = null; |
| } |
| TypeBinding type = ((VariableBinding) binding).type; |
| int index = indexOfFirstFieldBinding; |
| if (index == length) { // restrictiveFlag == FIELD |
| this.constant = FieldReference.getConstantFor((FieldBinding) binding, this, false, scope); |
| // perform capture conversion if read access |
| return (type != null && (this.bits & IsStrictlyAssignedMASK) == 0) |
| ? type.capture() |
| : type; |
| } |
| // allocation of the fieldBindings array and its respective constants |
| int otherBindingsLength = length - index; |
| otherCodegenBindings = otherBindings = new FieldBinding[otherBindingsLength]; |
| otherDepths = new int[otherBindingsLength]; |
| |
| // fill the first constant (the one of the binding) |
| this.constant = field != null |
| ? FieldReference.getConstantFor((FieldBinding) binding, this, false, scope) |
| : ((VariableBinding) binding).constant(); |
| // save first depth, since will be updated by visibility checks of other bindings |
| int firstDepth = (bits & DepthMASK) >> DepthSHIFT; |
| // iteration on each field |
| while (index < length) { |
| char[] token = tokens[index]; |
| if (type == null) |
| return null; // could not resolve type prior to this point |
| |
| bits &= ~DepthMASK; // flush previous depth if any |
| FieldBinding previousField = field; |
| field = scope.getField(type.capture(), token, this); |
| int place = index - indexOfFirstFieldBinding; |
| otherBindings[place] = field; |
| otherDepths[place] = (bits & DepthMASK) >> DepthSHIFT; |
| if (field.isValidBinding()) { |
| // set generic cast of for previous field (if any) |
| if (previousField != null) { |
| TypeBinding fieldReceiverType = type; |
| TypeBinding receiverErasure = type.erasure(); |
| if (receiverErasure instanceof ReferenceBinding) { |
| ReferenceBinding match = ((ReferenceBinding)receiverErasure).findSuperTypeErasingTo((ReferenceBinding)field.declaringClass.erasure()); |
| if (match == null) { |
| fieldReceiverType = field.declaringClass; // handle indirect inheritance thru variable secondary bound |
| } |
| } |
| FieldBinding originalBinding = previousField.original(); |
| if ((originalBinding.type.tagBits & TagBits.HasTypeVariable) != 0 && fieldReceiverType.id != T_JavaLangObject) { |
| setGenericCast(index-1,originalBinding.type.genericCast(fieldReceiverType)); // type cannot be base-type even in boxing case |
| } |
| } |
| // only last field is actually a write access if any |
| if (isFieldUseDeprecated(field, scope, (this.bits & IsStrictlyAssignedMASK) !=0 && index+1 == length)) { |
| scope.problemReporter().deprecatedField(field, this); |
| } |
| Constant someConstant = FieldReference.getConstantFor(field, this, false, scope); |
| // constant propagation can only be performed as long as the previous one is a constant too. |
| if (this.constant != NotAConstant) { |
| this.constant = someConstant; |
| } |
| |
| if (field.isStatic()) { |
| // static field accessed through receiver? legal but unoptimal (optional warning) |
| scope.problemReporter().nonStaticAccessToStaticField(this, field); |
| // indirect static reference ? |
| if (field.declaringClass != type) { |
| scope.problemReporter().indirectAccessToStaticField(this, field); |
| } |
| } |
| type = field.type; |
| index++; |
| } else { |
| constant = NotAConstant; //don't fill other constants slots... |
| scope.problemReporter().invalidField(this, field, index, type); |
| setDepth(firstDepth); |
| return null; |
| } |
| } |
| setDepth(firstDepth); |
| type = (otherBindings[otherBindingsLength - 1]).type; |
| // perform capture conversion if read access |
| return (type != null && (this.bits & IsStrictlyAssignedMASK) == 0) |
| ? type.capture() |
| : type; |
| } |
| public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) { |
| if (!flowInfo.isReachable()) return; |
| //If inlinable field, forget the access emulation, the code gen will directly target it |
| if (((bits & DepthMASK) == 0) || (constant != NotAConstant)) { |
| return; |
| } |
| if ((bits & RestrictiveFlagMASK) == Binding.LOCAL) { |
| currentScope.emulateOuterAccess((LocalVariableBinding) binding); |
| } |
| } |
| /** |
| * index is <0 to denote write access emulation |
| */ |
| public void manageSyntheticAccessIfNecessary( |
| BlockScope currentScope, |
| FieldBinding fieldBinding, |
| TypeBinding lastReceiverType, |
| int index, |
| FlowInfo flowInfo) { |
| |
| if (!flowInfo.isReachable()) return; |
| // index == 0 denotes the first fieldBinding, index > 0 denotes one of the 'otherBindings', index < 0 denotes a write access (to last binding) |
| if (fieldBinding.isConstantValue()) |
| return; |
| |
| // if field from parameterized type got found, use the original field at codegen time |
| FieldBinding originalField = fieldBinding.original(); |
| if (originalField != fieldBinding) { |
| setCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index, originalField); |
| } |
| |
| if (fieldBinding.isPrivate()) { // private access |
| FieldBinding someCodegenBinding = getCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index); |
| if (someCodegenBinding.declaringClass != currentScope.enclosingSourceType()) { |
| setSyntheticAccessor(fieldBinding, index, |
| ((SourceTypeBinding) someCodegenBinding.declaringClass).addSyntheticMethod(someCodegenBinding, index >= 0 /*read-access?*/)); |
| currentScope.problemReporter().needToEmulateFieldAccess(someCodegenBinding, this, index >= 0 /*read-access?*/); |
| return; |
| } |
| } else if (fieldBinding.isProtected()){ |
| int depth = fieldBinding == binding |
| ? (bits & DepthMASK) >> DepthSHIFT |
| : otherDepths[index < 0 ? otherDepths.length-1 : index-1]; |
| |
| // implicit protected access |
| if (depth > 0 && (fieldBinding.declaringClass.getPackage() != currentScope.enclosingSourceType().getPackage())) { |
| FieldBinding someCodegenBinding = getCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index); |
| setSyntheticAccessor(fieldBinding, index, |
| ((SourceTypeBinding) currentScope.enclosingSourceType().enclosingTypeAt(depth)).addSyntheticMethod(someCodegenBinding, index >= 0 /*read-access?*/)); |
| currentScope.problemReporter().needToEmulateFieldAccess(someCodegenBinding, this, index >= 0 /*read-access?*/); |
| return; |
| } |
| } |
| // if the binding declaring class is not visible, need special action |
| // for runtime compatibility on 1.2 VMs : change the declaring class of the binding |
| // NOTE: from target 1.2 on, field's declaring class is touched if any different from receiver type |
| // and not from Object or implicit static field access. |
| if (fieldBinding.declaringClass != lastReceiverType |
| && !lastReceiverType.isArrayType() |
| && fieldBinding.declaringClass != null // array.length |
| && !fieldBinding.isConstantValue()) { |
| CompilerOptions options = currentScope.environment().options; |
| if ((options.targetJDK >= ClassFileConstants.JDK1_2 |
| && (options.complianceLevel >= ClassFileConstants.JDK1_4 || fieldBinding != binding || indexOfFirstFieldBinding > 1 || !fieldBinding.isStatic()) |
| && fieldBinding.declaringClass.id != T_JavaLangObject) // no change for Object fields |
| || !fieldBinding.declaringClass.canBeSeenBy(currentScope)) { |
| |
| setCodegenBinding( |
| index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index, |
| currentScope.enclosingSourceType().getUpdatedFieldBinding( |
| getCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index), |
| (ReferenceBinding)lastReceiverType.erasure())); |
| } |
| } |
| } |
| |
| public StringBuffer printExpression(int indent, StringBuffer output) { |
| |
| for (int i = 0; i < tokens.length; i++) { |
| if (i > 0) output.append('.'); |
| output.append(tokens[i]); |
| } |
| return output; |
| } |
| |
| /** |
| * Normal field binding did not work, try to bind to a field of the delegate receiver. |
| */ |
| public TypeBinding reportError(BlockScope scope) { |
| if (binding instanceof ProblemFieldBinding) { |
| scope.problemReporter().invalidField(this, (FieldBinding) binding); |
| } else if (binding instanceof ProblemReferenceBinding) { |
| scope.problemReporter().invalidType(this, (TypeBinding) binding); |
| } else { |
| scope.problemReporter().unresolvableReference(this, binding); |
| } |
| return null; |
| } |
| public TypeBinding resolveType(BlockScope scope) { |
| // field and/or local are done before type lookups |
| // the only available value for the restrictiveFlag BEFORE |
| // the TC is Flag_Type Flag_LocalField and Flag_TypeLocalField |
| this.actualReceiverType = scope.enclosingSourceType(); |
| constant = Constant.NotAConstant; |
| if ((this.codegenBinding = this.binding = scope.getBinding(tokens, bits & RestrictiveFlagMASK, this, true /*resolve*/)).isValidBinding()) { |
| switch (bits & RestrictiveFlagMASK) { |
| case Binding.VARIABLE : //============only variable=========== |
| case Binding.TYPE | Binding.VARIABLE : |
| if (binding instanceof LocalVariableBinding) { |
| if (!((LocalVariableBinding) binding).isFinal() && ((bits & DepthMASK) != 0)) |
| scope.problemReporter().cannotReferToNonFinalOuterLocal( |
| (LocalVariableBinding) binding, |
| this); |
| bits &= ~RestrictiveFlagMASK; // clear bits |
| bits |= Binding.LOCAL; |
| return this.resolvedType = getOtherFieldBindings(scope); |
| } |
| if (binding instanceof FieldBinding) { |
| // check for forward references |
| FieldBinding fieldBinding = (FieldBinding) binding; |
| MethodScope methodScope = scope.methodScope(); |
| if (methodScope.enclosingSourceType() == fieldBinding.declaringClass |
| && methodScope.lastVisibleFieldID >= 0 |
| && fieldBinding.id >= methodScope.lastVisibleFieldID) { |
| if ((!fieldBinding.isStatic() || methodScope.isStatic) |
| && this.indexOfFirstFieldBinding == 1) { |
| scope.problemReporter().forwardReference(this, 0, scope.enclosingSourceType()); |
| } |
| } |
| if (!fieldBinding.isStatic() |
| && this.indexOfFirstFieldBinding == 1 |
| && scope.environment().options.getSeverity(CompilerOptions.UnqualifiedFieldAccess) != ProblemSeverities.Ignore) { |
| scope.problemReporter().unqualifiedFieldAccess(this, fieldBinding); |
| } |
| bits &= ~RestrictiveFlagMASK; // clear bits |
| bits |= Binding.FIELD; |
| |
| // check for deprecated receiver type |
| // deprecation check for receiver type if not first token |
| if (indexOfFirstFieldBinding > 1) { |
| if (isTypeUseDeprecated(this.actualReceiverType, scope)) |
| scope.problemReporter().deprecatedType(this.actualReceiverType, this); |
| } |
| |
| return this.resolvedType = getOtherFieldBindings(scope); |
| } |
| // thus it was a type |
| bits &= ~RestrictiveFlagMASK; // clear bits |
| bits |= Binding.TYPE; |
| case Binding.TYPE : //=============only type ============== |
| TypeBinding type = (TypeBinding) binding; |
| if (isTypeUseDeprecated(type, scope)) |
| scope.problemReporter().deprecatedType(type, this); |
| return this.resolvedType = scope.convertToRawType(type); |
| } |
| } |
| //========error cases=============== |
| return this.resolvedType = this.reportError(scope); |
| } |
| |
| // set the matching codegenBinding and generic cast |
| protected void setCodegenBinding(int index, FieldBinding someCodegenBinding) { |
| |
| if (index == 0){ |
| this.codegenBinding = someCodegenBinding; |
| } else { |
| int length = this.otherBindings.length; |
| if (this.otherCodegenBindings == this.otherBindings){ |
| System.arraycopy(this.otherBindings, 0, this.otherCodegenBindings = new FieldBinding[length], 0, length); |
| } |
| this.otherCodegenBindings[index-1] = someCodegenBinding; |
| } |
| } |
| |
| // set the matching codegenBinding and generic cast |
| protected void setGenericCast(int index, TypeBinding someGenericCast) { |
| |
| if (index == 0){ |
| this.genericCast = someGenericCast; |
| } else { |
| if (this.otherGenericCasts == null) { |
| this.otherGenericCasts = new TypeBinding[this.otherBindings.length]; |
| } |
| this.otherGenericCasts[index-1] = someGenericCast; |
| } |
| } |
| |
| // set the matching synthetic accessor |
| protected void setSyntheticAccessor(FieldBinding fieldBinding, int index, SyntheticMethodBinding syntheticAccessor) { |
| if (index < 0) { // write-access ? |
| syntheticWriteAccessor = syntheticAccessor; |
| } else { |
| if (syntheticReadAccessors == null) { |
| syntheticReadAccessors = new SyntheticMethodBinding[otherBindings == null ? 1 : otherBindings.length + 1]; |
| } |
| syntheticReadAccessors[index] = syntheticAccessor; |
| } |
| } |
| |
| public void setFieldIndex(int index) { |
| this.indexOfFirstFieldBinding = index; |
| } |
| |
| public void traverse(ASTVisitor visitor, BlockScope scope) { |
| visitor.visit(this, scope); |
| visitor.endVisit(this, scope); |
| } |
| public String unboundReferenceErrorName() { |
| return new String(tokens[0]); |
| } |
| } |
