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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2000, 2020 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Stephan Herrmann - Contributions for
* bug 319201 - [null] no warning when unboxing SingleNameReference causes NPE
* bug 345305 - [compiler][null] Compiler misidentifies a case of "variable can only be null"
* bug 403147 - [compiler][null] FUP of bug 400761: consolidate interaction between unboxing, NPE, and deferred checking
* Bug 417758 - [1.8][null] Null safety compromise during array creation.
* Bug 427163 - [1.8][null] bogus error "Contradictory null specification" on varags
* Andy Clement (GoPivotal, Inc) [email protected] - Contributions for
* Bug 383624 - [1.8][compiler] Revive code generation support for type annotations (from Olivier's work)
* Bug 409247 - [1.8][compiler] Verify error with code allocating multidimensional array
*******************************************************************************/
package org.aspectj.org.eclipse.jdt.internal.compiler.ast;
import java.util.List;
import org.aspectj.org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.aspectj.org.eclipse.jdt.internal.compiler.impl.*;
import org.aspectj.org.eclipse.jdt.internal.compiler.ast.TypeReference.AnnotationCollector;
import org.aspectj.org.eclipse.jdt.internal.compiler.codegen.*;
import org.aspectj.org.eclipse.jdt.internal.compiler.flow.*;
import org.aspectj.org.eclipse.jdt.internal.compiler.lookup.*;
public class ArrayAllocationExpression extends Expression {
public TypeReference type;
//dimensions.length gives the number of dimensions, but the
// last ones may be nulled as in new int[4][5][][]
public Expression[] dimensions;
public Annotation [][] annotationsOnDimensions; // jsr308 style annotations.
public ArrayInitializer initializer;
@Override
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
for (int i = 0, max = this.dimensions.length; i < max; i++) {
Expression dim;
if ((dim = this.dimensions[i]) != null) {
flowInfo = dim.analyseCode(currentScope, flowContext, flowInfo);
dim.checkNPEbyUnboxing(currentScope, flowContext, flowInfo);
}
}
// account for potential OutOfMemoryError:
flowContext.recordAbruptExit();
if (this.initializer != null) {
return this.initializer.analyseCode(currentScope, flowContext, flowInfo);
}
return flowInfo;
}
/**
* Code generation for a array allocation expression
*/
@Override
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
if (this.initializer != null) {
this.initializer.generateCode(this.type, this, currentScope, codeStream, valueRequired);
return;
}
int explicitDimCount = 0;
for (int i = 0, max = this.dimensions.length; i < max; i++) {
Expression dimExpression;
if ((dimExpression = this.dimensions[i]) == null) break; // implicit dim, no further explict after this point
dimExpression.generateCode(currentScope, codeStream, true);
explicitDimCount++;
}
// array allocation
if (explicitDimCount == 1) {
// Mono-dimensional array
codeStream.newArray(this.type, this, (ArrayBinding)this.resolvedType);
} else {
// Multi-dimensional array
codeStream.multianewarray(this.type, this.resolvedType, explicitDimCount, this);
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
@Override
public StringBuilder printExpression(int indent, StringBuilder output) {
output.append("new "); //$NON-NLS-1$
this.type.print(0, output);
for (int i = 0; i < this.dimensions.length; i++) {
if (this.annotationsOnDimensions != null && this.annotationsOnDimensions[i] != null) {
output.append(' ');
printAnnotations(this.annotationsOnDimensions[i], output);
output.append(' ');
}
if (this.dimensions[i] == null)
output.append("[]"); //$NON-NLS-1$
else {
output.append('[');
this.dimensions[i].printExpression(0, output);
output.append(']');
}
}
if (this.initializer != null) this.initializer.printExpression(0, output);
return output;
}
@Override
public TypeBinding resolveType(BlockScope scope) {
// Build an array type reference using the current dimensions
// The parser does not check for the fact that dimension may be null
// only at the -end- like new int [4][][]. The parser allows new int[][4][]
// so this must be checked here......(this comes from a reduction to LL1 grammar)
TypeBinding referenceType = this.type.resolveType(scope, true /* check bounds*/);
// will check for null after dimensions are checked
this.constant = Constant.NotAConstant;
if (referenceType == TypeBinding.VOID) {
scope.problemReporter().cannotAllocateVoidArray(this);
referenceType = null;
}
// check the validity of the dimension syntax (and test for all null dimensions)
int explicitDimIndex = -1;
loop: for (int i = this.dimensions.length; --i >= 0;) {
if (this.dimensions[i] != null) {
if (explicitDimIndex < 0) explicitDimIndex = i;
} else if (explicitDimIndex > 0) {
// should not have an empty dimension before an non-empty one
scope.problemReporter().incorrectLocationForNonEmptyDimension(this, explicitDimIndex);
break loop;
}
}
// explicitDimIndex < 0 says if all dimensions are nulled
// when an initializer is given, no dimension must be specified
if (this.initializer == null) {
if (explicitDimIndex < 0) {
scope.problemReporter().mustDefineDimensionsOrInitializer(this);
}
// allow new List[5] - only check for generic array when no initializer, since also checked inside initializer resolution
if (referenceType != null && !referenceType.isReifiable()) {
scope.problemReporter().illegalGenericArray(referenceType, this);
}
} else if (explicitDimIndex >= 0) {
scope.problemReporter().cannotDefineDimensionsAndInitializer(this);
}
// dimensions resolution
for (int i = 0; i <= explicitDimIndex; i++) {
Expression dimExpression;
if ((dimExpression = this.dimensions[i]) != null) {
TypeBinding dimensionType = dimExpression.resolveTypeExpecting(scope, TypeBinding.INT);
if (dimensionType != null) {
this.dimensions[i].computeConversion(scope, TypeBinding.INT, dimensionType);
}
}
}
// building the array binding
if (referenceType != null) {
if (this.dimensions.length > 255) {
scope.problemReporter().tooManyDimensions(this);
}
if (this.type.annotations != null
&& (referenceType.tagBits & TagBits.AnnotationNullMASK) == TagBits.AnnotationNullMASK)
{
scope.problemReporter().contradictoryNullAnnotations(this.type.annotations[this.type.annotations.length-1]);
referenceType = referenceType.withoutToplevelNullAnnotation();
}
this.resolvedType = scope.createArrayType(referenceType, this.dimensions.length);
int lastInitializedDim = -1;
long[] nullTagBitsPerDimension = null;
if (this.annotationsOnDimensions != null) {
this.resolvedType = resolveAnnotations(scope, this.annotationsOnDimensions, this.resolvedType);
nullTagBitsPerDimension = ((ArrayBinding)this.resolvedType).nullTagBitsPerDimension;
if (nullTagBitsPerDimension != null) {
for (int i = 0; i < this.annotationsOnDimensions.length; i++) {
if ((nullTagBitsPerDimension[i] & TagBits.AnnotationNullMASK) == TagBits.AnnotationNullMASK) {
scope.problemReporter().contradictoryNullAnnotations(this.annotationsOnDimensions[i]);
nullTagBitsPerDimension[i] = 0;
}
if (this.dimensions[i] != null) {
lastInitializedDim = i;
}
}
}
}
if (this.initializer != null) {
this.resolvedType = ArrayTypeReference.maybeMarkArrayContentsNonNull(scope, this.resolvedType, this.sourceStart, this.dimensions.length, null);
if ((this.initializer.resolveTypeExpecting(scope, this.resolvedType)) != null)
this.initializer.binding = (ArrayBinding)this.resolvedType;
} else {
// check uninitialized cells declared @NonNull inside the last initialized dimension
if (lastInitializedDim != -1 && nullTagBitsPerDimension != null) {
checkUninitializedNonNullArrayContents(scope, nullTagBitsPerDimension[lastInitializedDim+1], lastInitializedDim);
}
}
if ((referenceType.tagBits & TagBits.HasMissingType) != 0) {
return null;
}
}
return this.resolvedType;
}
protected void checkUninitializedNonNullArrayContents(BlockScope scope, long elementNullTagBits, int lastDim) {
if ((elementNullTagBits & TagBits.AnnotationNonNull) == 0)
return; // next element type admits 'null' entries
if (this.dimensions[lastDim] instanceof IntLiteral) {
Constant intConstant = ((IntLiteral) this.dimensions[lastDim]).constant;
if (intConstant.intValue() == 0)
return; // last dimension [0] implies no 'null' entries
}
TypeBinding elementType = this.resolvedType;
for (int i=0; i allTypeAnnotationContexts) {
AnnotationCollector collector = new AnnotationCollector(this, targetType, info, allTypeAnnotationContexts);
this.type.traverse(collector, (BlockScope) null);
if (this.annotationsOnDimensions != null) {
int dimensionsLength = this.dimensions.length;
for (int i = 0; i < dimensionsLength; i++) {
Annotation [] annotations = this.annotationsOnDimensions[i];
int annotationsLength = annotations == null ? 0 : annotations.length;
for (int j = 0; j < annotationsLength; j++) {
annotations[j].traverse(collector, (BlockScope) null);
}
}
}
}
public Annotation[][] getAnnotationsOnDimensions() {
return this.annotationsOnDimensions;
}
}