/*******************************************************************************
* 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
* Stephan Herrmann <stephan@cs.tu-berlin.de> - Contribution for bug 185682 - Increment/decrement operators mark local variables as read
*******************************************************************************/
package org.eclipse.che.ide.ext.java.jdt.internal.compiler.ast;
import org.eclipse.che.ide.ext.java.jdt.core.compiler.CharOperation;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.ASTVisitor;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.ClassFileConstants;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.flow.FlowContext;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.flow.FlowInfo;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.impl.Constant;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.Binding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.BlockScope;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.ClassScope;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.FieldBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.LocalVariableBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.MethodScope;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.MissingTypeBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.ProblemFieldBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.ProblemReasons;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.ProblemReferenceBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.ReferenceBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.Scope;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.SourceTypeBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.SyntheticMethodBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.TagBits;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.TypeBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.TypeIds;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.VariableBinding;
import org.eclipse.che.ide.ext.java.jdt.internal.compiler.problem.ProblemSeverities;
public class QualifiedNameReference extends NameReference {
public char[][] tokens;
public long[] sourcePositions;
public FieldBinding[] otherBindings;
int[] otherDepths;
public int indexOfFirstFieldBinding;//points (into tokens) for the first token that corresponds to first FieldBinding
public SyntheticMethodBinding syntheticWriteAccessor;
public SyntheticMethodBinding[] syntheticReadAccessors;
public TypeBinding genericCast;
public TypeBinding[] otherGenericCasts;
public QualifiedNameReference(char[][] tokens, long[] positions, int sourceStart, int sourceEnd) {
this.tokens = tokens;
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 = this.otherBindings == null ? 0 : this.otherBindings.length;
boolean needValue = otherBindingsCount == 0 || !this.otherBindings[0].isStatic();
boolean complyTo14 = currentScope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_4;
FieldBinding lastFieldBinding = null;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD: // reading a field
lastFieldBinding = (FieldBinding)this.binding;
if (needValue || complyTo14) {
manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, 0, flowInfo);
}
// check if final blank field
if (lastFieldBinding.isBlankFinal() && this.otherBindings != null // the last field binding is only assigned
&& currentScope.needBlankFinalFieldInitializationCheck(lastFieldBinding)) {
FlowInfo fieldInits =
flowContext.getInitsForFinalBlankInitializationCheck(lastFieldBinding.declaringClass.original(),
flowInfo);
if (!fieldInits.isDefinitelyAssigned(lastFieldBinding)) {
currentScope.problemReporter().uninitializedBlankFinalField(lastFieldBinding, this);
}
}
if (!lastFieldBinding.isStatic()) {
currentScope.resetEnclosingMethodStaticFlag();
}
break;
case Binding.LOCAL:
// first binding is a local variable
LocalVariableBinding localBinding;
if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding)this.binding)) {
currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
}
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
localBinding.useFlag = LocalVariableBinding.USED;
} else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
localBinding.useFlag = LocalVariableBinding.FAKE_USED;
}
if (needValue) {
checkNPE(currentScope, flowContext, flowInfo, true);
}
}
if (needValue) {
manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
// only for first binding
}
// all intermediate field accesses are read accesses
if (this.otherBindings != null) {
for (int i = 0; i < otherBindingsCount - 1; i++) {
lastFieldBinding = this.otherBindings[i];
needValue = !this.otherBindings[i + 1].isStatic();
if (needValue || complyTo14) {
manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, i + 1, flowInfo);
}
}
lastFieldBinding = this.otherBindings[otherBindingsCount - 1];
}
if (isCompound) {
if (otherBindingsCount == 0 && lastFieldBinding.isBlankFinal()
&& currentScope.needBlankFinalFieldInitializationCheck(lastFieldBinding)) {
FlowInfo fieldInits =
flowContext.getInitsForFinalBlankInitializationCheck(lastFieldBinding.declaringClass, flowInfo);
if (!fieldInits.isDefinitelyAssigned(lastFieldBinding)) {
currentScope.problemReporter().uninitializedBlankFinalField(lastFieldBinding, this);
}
}
manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, 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 (otherBindingsCount == 0 && this.indexOfFirstFieldBinding == 1 && lastFieldBinding.isBlankFinal()
&& !isCompound && currentScope.allowBlankFinalFieldAssignment(lastFieldBinding)) {
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 (otherBindingsCount == 0 && currentScope.allowBlankFinalFieldAssignment(lastFieldBinding)) { // pretend it got assigned
flowInfo.markAsDefinitelyAssigned(lastFieldBinding);
}
}
}
manageSyntheticAccessIfNecessary(currentScope, lastFieldBinding, -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 = this.otherBindings == null ? 0 : this.otherBindings.length;
boolean needValue = otherBindingsCount == 0 ? valueRequired : !this.otherBindings[0].isStatic();
boolean complyTo14 = currentScope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_4;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD: // reading a field
if (needValue || complyTo14) {
manageSyntheticAccessIfNecessary(currentScope, (FieldBinding)this.binding, 0, flowInfo);
}
FieldBinding fieldBinding = (FieldBinding)this.binding;
if (this.indexOfFirstFieldBinding == 1) { // was an implicit reference to the first field binding
// check if reading a final blank field
if (fieldBinding.isBlankFinal() && currentScope.needBlankFinalFieldInitializationCheck(fieldBinding)) {
FlowInfo fieldInits =
flowContext.getInitsForFinalBlankInitializationCheck(fieldBinding.declaringClass.original(),
flowInfo);
if (!fieldInits.isDefinitelyAssigned(fieldBinding)) {
currentScope.problemReporter().uninitializedBlankFinalField(fieldBinding, this);
}
}
}
if (!fieldBinding.isStatic()) {
currentScope.resetEnclosingMethodStaticFlag();
}
break;
case Binding.LOCAL: // reading a local variable
LocalVariableBinding localBinding;
if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding)this.binding)) {
currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
}
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
localBinding.useFlag = LocalVariableBinding.USED;
} else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
localBinding.useFlag = LocalVariableBinding.FAKE_USED;
}
if (needValue) {
checkNPE(currentScope, flowContext, flowInfo, true);
}
}
if (needValue) {
manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
// only for first binding (if value needed only)
}
if (this.otherBindings != null) {
for (int i = 0; i < otherBindingsCount; i++) {
needValue = i < otherBindingsCount - 1 ? !this.otherBindings[i + 1].isStatic() : valueRequired;
if (needValue || complyTo14) {
manageSyntheticAccessIfNecessary(currentScope, this.otherBindings[i], i + 1, flowInfo);
}
}
}
return flowInfo;
}
public void checkNPE(BlockScope scope, FlowContext flowContext, FlowInfo flowInfo, boolean checkString) {
// cannot override localVariableBinding because this would project o.m onto o when
// analyzing assignments
if ((this.bits & ASTNode.RestrictiveFlagMASK) == Binding.LOCAL) {
LocalVariableBinding local = (LocalVariableBinding)this.binding;
if (local != null && (local.type.tagBits & TagBits.IsBaseType) == 0
&& (checkString || local.type.id != TypeIds.T_JavaLangString)) {
if ((this.bits & ASTNode.IsNonNull) == 0) {
flowContext.recordUsingNullReference(scope, local, this, FlowContext.MAY_NULL, flowInfo);
}
flowInfo.markAsComparedEqualToNonNull(local);
// from thereon it is set
if ((flowContext.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) != 0) {
flowInfo.markedAsNullOrNonNullInAssertExpression(local);
}
if (flowContext.initsOnFinally != null) {
flowContext.initsOnFinally.markAsComparedEqualToNonNull(local);
if ((flowContext.tagBits & FlowContext.HIDE_NULL_COMPARISON_WARNING) != 0) {
flowContext.initsOnFinally.markedAsNullOrNonNullInAssertExpression(local);
}
}
}
}
}
/**
* @see org.eclipse.che.ide.ext.java.jdt.internal.compiler.ast.Expression#computeConversion(org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.Scope,
* org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.TypeBinding, org.eclipse.che.ide.ext.java.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();
TypeBinding originalType = originalBinding.type;
// extra cast needed if field type is type variable
if (originalType.leafComponentType().isTypeVariable()) {
TypeBinding targetType = (!compileTimeType.isBaseType() && runtimeTimeType.isBaseType()) ? compileTimeType
// unboxing: checkcast before conversion
: runtimeTimeType;
TypeBinding typeCast = originalType.genericCast(targetType);
setGenericCast(length, typeCast);
if (typeCast instanceof ReferenceBinding) {
ReferenceBinding referenceCast = (ReferenceBinding)typeCast;
if (!referenceCast.canBeSeenBy(scope)) {
scope.problemReporter().invalidType(
this,
new ProblemReferenceBinding(CharOperation.splitOn('.', referenceCast.shortReadableName()),
referenceCast, ProblemReasons.NotVisible));
}
}
}
}
super.computeConversion(scope, runtimeTimeType, compileTimeType);
}
public void generateAssignment(BlockScope currentScope, Assignment assignment, boolean valueRequired) {
FieldBinding lastFieldBinding = generateReadSequence(currentScope);
assignment.expression.generateCode(currentScope, true);
fieldStore(currentScope, lastFieldBinding, this.syntheticWriteAccessor, getFinalReceiverType(),
false /*implicit this*/, valueRequired);
// equivalent to valuesRequired[maxOtherBindings]
}
public void generateCode(BlockScope currentScope, boolean valueRequired) {
}
public void generateCompoundAssignment(BlockScope currentScope, Expression expression, int operator,
int assignmentImplicitConversion, boolean valueRequired) {
FieldBinding lastFieldBinding = generateReadSequence(currentScope);
// check if compound assignment is the only usage of a private field
reportOnlyUselesslyReadPrivateField(currentScope, lastFieldBinding, valueRequired);
// the last field access is a write access
// perform the actual compound operation
switch (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK >> 4) {
case T_JavaLangString:
case T_JavaLangObject:
case T_undefined:
break;
default:
// generate the increment value (will by itself be promoted to the operation value)
if (expression != IntLiteral.One) { // prefix operation
expression.generateCode(currentScope, true);
}
}
// actual assignment
fieldStore(currentScope, lastFieldBinding, this.syntheticWriteAccessor, getFinalReceiverType(),
false /*implicit this*/, valueRequired);
// equivalent to valuesRequired[maxOtherBindings]
}
public void generatePostIncrement(BlockScope currentScope, CompoundAssignment postIncrement, boolean valueRequired) {
FieldBinding lastFieldBinding = generateReadSequence(currentScope);
// check if this post increment is the only usage of a private field
reportOnlyUselesslyReadPrivateField(currentScope, lastFieldBinding, valueRequired);
fieldStore(currentScope, lastFieldBinding, this.syntheticWriteAccessor, getFinalReceiverType(),
false /*implicit this*/, 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) {
// determine the rank until which we now we do not need any actual value for the field access
int otherBindingsCount = this.otherBindings == null ? 0 : this.otherBindings.length;
FieldBinding lastFieldBinding;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD:
lastFieldBinding = ((FieldBinding)this.binding).original();
// if first field is actually constant, we can inline it
break;
case Binding.LOCAL: // reading the first local variable
lastFieldBinding = null;
default: // should not occur
return null;
}
// all intermediate field accesses are read accesses
// only the last field binding is a write access
if (this.otherBindings != null) {
for (int i = 0; i < otherBindingsCount; i++) {
FieldBinding nextField = this.otherBindings[i].original();
lastFieldBinding = nextField;
}
}
return lastFieldBinding;
}
/** @see org.eclipse.che.ide.ext.java.jdt.internal.compiler.lookup.InvocationSite#genericTypeArguments() */
public TypeBinding[] genericTypeArguments() {
return null;
}
protected FieldBinding getCodegenBinding(int index) {
if (index == 0) {
return ((FieldBinding)this.binding).original();
} else {
return this.otherBindings[index - 1].original();
}
}
/**
* Returns the receiver type for the final field in sequence (i.e. the return type of the previous binding)
*
* @return receiver type for the final field in sequence
*/
protected TypeBinding getFinalReceiverType() {
int otherBindingsCount = this.otherBindings == null ? 0 : this.otherBindings.length;
switch (otherBindingsCount) {
case 0:
return this.actualReceiverType;
case 1:
return this.genericCast != null ? this.genericCast : ((VariableBinding)this.binding).type;
default:
TypeBinding previousGenericCast =
this.otherGenericCasts == null ? null : this.otherGenericCasts[otherBindingsCount - 2];
return previousGenericCast != null ? previousGenericCast : this.otherBindings[otherBindingsCount - 2].type;
}
}
// 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 = this.tokens.length;
FieldBinding field = ((this.bits & Binding.FIELD) != 0) ? (FieldBinding)this.binding : null;
TypeBinding type = ((VariableBinding)this.binding).type;
int index = this.indexOfFirstFieldBinding;
if (index == length) { // restrictiveFlag == FIELD
this.constant = ((FieldBinding)this.binding).constant();
// perform capture conversion if read access
return (type != null && (this.bits & ASTNode.IsStrictlyAssigned) == 0) ? type.capture(scope, this.sourceEnd)
: type;
}
// allocation of the fieldBindings array and its respective constants
int otherBindingsLength = length - index;
this.otherBindings = new FieldBinding[otherBindingsLength];
this.otherDepths = new int[otherBindingsLength];
// fill the first constant (the one of the binding)
this.constant = ((VariableBinding)this.binding).constant();
// save first depth, since will be updated by visibility checks of other bindings
int firstDepth = (this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT;
// iteration on each field
while (index < length) {
char[] token = this.tokens[index];
if (type == null)
return null; // could not resolve type prior to this point
this.bits &= ~ASTNode.DepthMASK; // flush previous depth if any
FieldBinding previousField = field;
field = scope.getField(type.capture(scope, (int)this.sourcePositions[index]), token, this);
int place = index - this.indexOfFirstFieldBinding;
this.otherBindings[place] = field;
this.otherDepths[place] = (this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT;
if (field.isValidBinding()) {
// set generic cast of for previous field (if any)
if (previousField != null) {
TypeBinding fieldReceiverType = type;
TypeBinding oldReceiverType = fieldReceiverType;
fieldReceiverType = fieldReceiverType
.getErasureCompatibleType(field.declaringClass);// handle indirect inheritance thru variable secondary bound
FieldBinding originalBinding = previousField.original();
if (fieldReceiverType != oldReceiverType ||
originalBinding.type.leafComponentType().isTypeVariable()) { // record need for explicit cast at codegen
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, index + 1 == length ? this.bits : 0)) {
scope.problemReporter().deprecatedField(field, this);
}
// constant propagation can only be performed as long as the previous one is a constant too.
if (this.constant != Constant.NotAConstant) {
this.constant = field.constant();
}
if (field.isStatic()) {
if ((field.modifiers & ClassFileConstants.AccEnum) != 0) { // enum constants are checked even when qualified)
ReferenceBinding declaringClass = field.original().declaringClass;
MethodScope methodScope = scope.methodScope();
SourceTypeBinding sourceType = methodScope.enclosingSourceType();
if ((this.bits & ASTNode.IsStrictlyAssigned) == 0 && sourceType == declaringClass
&& methodScope.lastVisibleFieldID >= 0 && field.id >= methodScope.lastVisibleFieldID
&& (!field.isStatic() || methodScope.isStatic)) {
scope.problemReporter().forwardReference(this, index, field);
}
// check if accessing enum static field in initializer
if ((sourceType == declaringClass || sourceType.superclass == declaringClass) // enum constant body
&& field.constant() == Constant.NotAConstant
&& !methodScope.isStatic
&& methodScope.isInsideInitializerOrConstructor()) {
scope.problemReporter().enumStaticFieldUsedDuringInitialization(field, this);
}
}
// static field accessed through receiver? legal but unoptimal (optional warning)
scope.problemReporter().nonStaticAccessToStaticField(this, field, index);
// indirect static reference ?
if (field.declaringClass != type) {
scope.problemReporter().indirectAccessToStaticField(this, field);
}
}
type = field.type;
index++;
} else {
this.constant = Constant.NotAConstant; //don't fill other constants slots...
scope.problemReporter().invalidField(this, field, index, type);
setDepth(firstDepth);
return null;
}
}
setDepth(firstDepth);
type = (this.otherBindings[otherBindingsLength - 1]).type;
// perform capture conversion if read access
return (type != null && (this.bits & ASTNode.IsStrictlyAssigned) == 0) ? type.capture(scope, this.sourceEnd)
: type;
}
public void manageEnclosingInstanceAccessIfNecessary(BlockScope currentScope, FlowInfo flowInfo) {
//If inlinable field, forget the access emulation, the code gen will directly target it
if (((this.bits & ASTNode.DepthMASK) == 0) || (this.constant != Constant.NotAConstant)) {
return;
}
if ((this.bits & ASTNode.RestrictiveFlagMASK) == Binding.LOCAL) {
LocalVariableBinding localVariableBinding = (LocalVariableBinding)this.binding;
if (localVariableBinding != null) {
if ((localVariableBinding.tagBits & TagBits.NotInitialized) != 0) {
// local was tagged as uninitialized
return;
}
switch (localVariableBinding.useFlag) {
case LocalVariableBinding.FAKE_USED:
case LocalVariableBinding.USED:
currentScope.emulateOuterAccess(localVariableBinding);
}
}
}
}
/** index is <0 to denote write access emulation */
public void manageSyntheticAccessIfNecessary(BlockScope currentScope, FieldBinding fieldBinding, int index,
FlowInfo flowInfo) {
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE_OR_DEAD) != 0)
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.constant() != Constant.NotAConstant)
return;
if (fieldBinding.isPrivate()) { // private access
FieldBinding codegenField =
getCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index);
ReferenceBinding declaringClass = codegenField.declaringClass;
if (declaringClass != currentScope.enclosingSourceType()) {
setSyntheticAccessor(fieldBinding, index, ((SourceTypeBinding)declaringClass).addSyntheticMethod(
codegenField, index >= 0 /*read-access?*/, false /*not super access*/));
currentScope.problemReporter().needToEmulateFieldAccess(codegenField, this, index >= 0 /*read-access?*/);
return;
}
} else if (fieldBinding.isProtected()) {
int depth =
(index == 0 || (index < 0 && this.otherDepths == null))
? (this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT : this.otherDepths[index < 0
? this.otherDepths.length - 1 : index - 1];
// implicit protected access
if (depth > 0 && (fieldBinding.declaringClass.getPackage() != currentScope.enclosingSourceType().getPackage())) {
FieldBinding codegenField =
getCodegenBinding(index < 0 ? (this.otherBindings == null ? 0 : this.otherBindings.length) : index);
setSyntheticAccessor(fieldBinding, index,
((SourceTypeBinding)currentScope.enclosingSourceType().enclosingTypeAt(depth)).addSyntheticMethod(
codegenField, index >= 0 /*read-access?*/, false /*not super access*/));
currentScope.problemReporter().needToEmulateFieldAccess(codegenField, this, index >= 0 /*read-access?*/);
return;
}
}
}
public int nullStatus(FlowInfo flowInfo) {
return FlowInfo.UNKNOWN;
}
public Constant optimizedBooleanConstant() {
switch (this.resolvedType.id) {
case T_boolean:
case T_JavaLangBoolean:
if (this.constant != Constant.NotAConstant)
return this.constant;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD: // reading a field
if (this.otherBindings == null)
return ((FieldBinding)this.binding).constant();
//$FALL-THROUGH$
case Binding.LOCAL: // reading a local variable
return this.otherBindings[this.otherBindings.length - 1].constant();
}
}
return Constant.NotAConstant;
}
/** @see org.eclipse.che.ide.ext.java.jdt.internal.compiler.ast.Expression#postConversionType(Scope) */
public TypeBinding postConversionType(Scope scope) {
TypeBinding convertedType = this.resolvedType;
TypeBinding requiredGenericCast = getGenericCast(this.otherBindings == null ? 0 : this.otherBindings.length);
if (requiredGenericCast != null)
convertedType = requiredGenericCast;
int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
switch (runtimeType) {
case T_boolean:
convertedType = TypeBinding.BOOLEAN;
break;
case T_byte:
convertedType = TypeBinding.BYTE;
break;
case T_short:
convertedType = TypeBinding.SHORT;
break;
case T_char:
convertedType = TypeBinding.CHAR;
break;
case T_int:
convertedType = TypeBinding.INT;
break;
case T_float:
convertedType = TypeBinding.FLOAT;
break;
case T_long:
convertedType = TypeBinding.LONG;
break;
case T_double:
convertedType = TypeBinding.DOUBLE;
break;
default:
}
if ((this.implicitConversion & TypeIds.BOXING) != 0) {
convertedType = scope.environment().computeBoxingType(convertedType);
}
return convertedType;
}
public StringBuffer printExpression(int indent, StringBuffer output) {
for (int i = 0; i < this.tokens.length; i++) {
if (i > 0)
output.append('.');
output.append(this.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 (this.binding instanceof ProblemFieldBinding) {
scope.problemReporter().invalidField(this, (FieldBinding)this.binding);
} else if (this.binding instanceof ProblemReferenceBinding || this.binding instanceof MissingTypeBinding) {
scope.problemReporter().invalidType(this, (TypeBinding)this.binding);
} else {
scope.problemReporter().unresolvableReference(this, 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.enclosingReceiverType();
this.constant = Constant.NotAConstant;
if ((this.binding =
scope.getBinding(this.tokens, this.bits & ASTNode.RestrictiveFlagMASK, this, true /*resolve*/))
.isValidBinding()) {
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.VARIABLE: //============only variable===========
case Binding.TYPE | Binding.VARIABLE:
if (this.binding instanceof LocalVariableBinding) {
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.LOCAL;
LocalVariableBinding local = (LocalVariableBinding)this.binding;
if (!local.isFinal() && ((this.bits & ASTNode.DepthMASK) != 0)) {
scope.problemReporter().cannotReferToNonFinalOuterLocal((LocalVariableBinding)this.binding, this);
}
if (local.type != null && (local.type.tagBits & TagBits.HasMissingType) != 0) {
// only complain if field reference (for local, its type got flagged already)
return null;
}
this.resolvedType = getOtherFieldBindings(scope);
if (this.resolvedType != null && (this.resolvedType.tagBits & TagBits.HasMissingType) != 0) {
FieldBinding lastField = this.otherBindings[this.otherBindings.length - 1];
scope.problemReporter().invalidField(this,
new ProblemFieldBinding(lastField.declaringClass, lastField.name,
ProblemReasons.NotFound),
this.tokens.length, this.resolvedType.leafComponentType());
return null;
}
return this.resolvedType;
}
if (this.binding instanceof FieldBinding) {
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.FIELD;
FieldBinding fieldBinding = (FieldBinding)this.binding;
MethodScope methodScope = scope.methodScope();
ReferenceBinding declaringClass = fieldBinding.original().declaringClass;
SourceTypeBinding sourceType = methodScope.enclosingSourceType();
// check for forward references
if ((this.indexOfFirstFieldBinding == 1 || (fieldBinding.modifiers & ClassFileConstants.AccEnum) != 0 ||
(!fieldBinding
.isFinal() && declaringClass.isEnum())) // enum constants are checked even when qualified
&& sourceType == declaringClass
&& methodScope.lastVisibleFieldID >= 0
&& fieldBinding.id >= methodScope.lastVisibleFieldID
&& (!fieldBinding.isStatic() || methodScope.isStatic)) {
scope.problemReporter().forwardReference(this, this.indexOfFirstFieldBinding - 1, fieldBinding);
}
if (isFieldUseDeprecated(fieldBinding, scope, this.indexOfFirstFieldBinding == this.tokens.length
? this.bits : 0)) {
scope.problemReporter().deprecatedField(fieldBinding, this);
}
if (fieldBinding.isStatic()) {
// only last field is actually a write access if any
// check if accessing enum static field in initializer
if (declaringClass.isEnum()) {
if ((sourceType == declaringClass || sourceType.superclass == declaringClass) // enum constant body
&& fieldBinding.constant() == Constant.NotAConstant
&& !methodScope.isStatic
&& methodScope.isInsideInitializerOrConstructor()) {
scope.problemReporter().enumStaticFieldUsedDuringInitialization(fieldBinding, this);
}
}
if (this.indexOfFirstFieldBinding > 1 && fieldBinding.declaringClass != this.actualReceiverType
&& fieldBinding.declaringClass.canBeSeenBy(scope)) {
scope.problemReporter().indirectAccessToStaticField(this, fieldBinding);
}
} else {
if (this.indexOfFirstFieldBinding == 1
&&
scope.compilerOptions().getSeverity(CompilerOptions.UnqualifiedFieldAccess) != ProblemSeverities.Ignore) {
scope.problemReporter().unqualifiedFieldAccess(this, fieldBinding);
}
//must check for the static status....
if (this.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, fieldBinding);
return null;
}
}
this.resolvedType = getOtherFieldBindings(scope);
if (this.resolvedType != null && (this.resolvedType.tagBits & TagBits.HasMissingType) != 0) {
FieldBinding lastField =
this.indexOfFirstFieldBinding == this.tokens.length ? (FieldBinding)this.binding
: this.otherBindings[this.otherBindings.length - 1];
scope.problemReporter().invalidField(this,
new ProblemFieldBinding(lastField.declaringClass, lastField.name,
ProblemReasons.NotFound),
this.tokens.length, this.resolvedType.leafComponentType());
return null;
}
return this.resolvedType;
}
// thus it was a type
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.TYPE;
//$FALL-THROUGH$
case Binding.TYPE: //=============only type ==============
TypeBinding type = (TypeBinding)this.binding;
// if (isTypeUseDeprecated(type, scope))
// scope.problemReporter().deprecatedType(type, this);
type = scope.environment().convertToRawType(type, false /*do not force conversion of enclosing types*/);
return this.resolvedType = type;
}
}
//========error cases===============
return this.resolvedType = reportError(scope);
}
public void setFieldIndex(int index) {
this.indexOfFirstFieldBinding = index;
}
// set the matching codegenBinding and generic cast
protected void setGenericCast(int index, TypeBinding someGenericCast) {
if (someGenericCast == null)
return;
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 ?
this.syntheticWriteAccessor = syntheticAccessor;
} else {
if (this.syntheticReadAccessors == null) {
this.syntheticReadAccessors =
new SyntheticMethodBinding[this.otherBindings == null ? 1 : this.otherBindings.length + 1];
}
this.syntheticReadAccessors[index] = syntheticAccessor;
}
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
visitor.visit(this, scope);
visitor.endVisit(this, scope);
}
public void traverse(ASTVisitor visitor, ClassScope scope) {
visitor.visit(this, scope);
visitor.endVisit(this, scope);
}
public String unboundReferenceErrorName() {
return new String(this.tokens[0]);
}
}