InstanceOfExpression.java
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net.sourceforge.phpdt.internal.compiler.ast |
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These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
/*******************************************************************************
* Copyright (c) 2000, 2003 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 net.sourceforge.phpdt.internal.compiler.ast;
import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
import net.sourceforge.phpdt.internal.compiler.lookup.ArrayBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.Scope;
import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
public class InstanceOfExpression extends OperatorExpression {
public Expression expression;
public TypeReference type;
public InstanceOfExpression(Expression expression, TypeReference type,
int operator) {
this.expression = expression;
this.type = type;
this.bits |= operator << OperatorSHIFT;
this.sourceStart = expression.sourceStart;
this.sourceEnd = type.sourceEnd;
}
public FlowInfo analyseCode(BlockScope currentScope,
FlowContext flowContext, FlowInfo flowInfo) {
return expression.analyseCode(currentScope, flowContext, flowInfo)
.unconditionalInits();
}
public final boolean areTypesCastCompatible(BlockScope scope,
TypeBinding castType, TypeBinding expressionType) {
// see specifications p.68
// A more cpmplete version of this method is provided on
// CastExpression (it deals with constant and need runtime checkcast)
if (castType == expressionType)
return true;
// by grammatical construction, the first test is ALWAYS false
// if (castTb.isBaseType())
// { if (expressionTb.isBaseType())
// { if
// (expression.isConstantValueOfTypeAssignableToType(expressionTb,castTb))
// { return true;}
// else
// { if (expressionTb==castTb)
// { return true;}
// else
// { if (scope.areTypesCompatible(expressionTb,castTb))
// { return true; }
//
// if (BaseTypeBinding.isNarrowing(castTb.id,expressionTb.id))
// { return true;}
// return false;}}}
// else
// { return false; }}
// else
{ // -------------checkcast to something which is NOT a
// basetype----------------------------------
// null is compatible with every thing ....
if (NullBinding == expressionType) {
return true;
}
if (expressionType.isArrayType()) {
if (castType.isArrayType()) {
// ------- (castTb.isArray) expressionTb.isArray -----------
TypeBinding expressionEltTb = ((ArrayBinding) expressionType)
.elementsType(scope);
if (expressionEltTb.isBaseType())
// <---stop the recursion-------
return ((ArrayBinding) castType).elementsType(scope) == expressionEltTb;
// recursivly on the elts...
return areTypesCastCompatible(scope,
((ArrayBinding) castType).elementsType(scope),
expressionEltTb);
}
if (castType.isClass()) {
// ------(castTb.isClass) expressionTb.isArray
// ---------------
if (scope.isJavaLangObject(castType))
return true;
return false;
}
if (castType.isInterface()) {
// ------- (castTb.isInterface) expressionTb.isArray
// -----------
if (scope.isJavaLangCloneable(castType)
|| scope.isJavaIoSerializable(castType)) {
return true;
}
return false;
}
return false;
}
if (expressionType.isBaseType()) {
return false;
}
if (expressionType.isClass()) {
if (castType.isArrayType()) {
// ---- (castTb.isArray) expressionTb.isClass -------
if (scope.isJavaLangObject(expressionType)) {
return true;
} else {
return false;
}
}
if (castType.isClass()) { // ----- (castTb.isClass)
// expressionTb.isClass ------
if (expressionType.isCompatibleWith(castType))
return true;
else {
if (castType.isCompatibleWith(expressionType)) {
return true;
}
return false;
}
}
if (castType.isInterface()) {
// ----- (castTb.isInterface) expressionTb.isClass -------
if (((ReferenceBinding) expressionType).isFinal()) {
// no subclass for expressionTb, thus compile-time check
// is valid
if (expressionType.isCompatibleWith(castType))
return true;
return false;
} else {
return true;
}
}
return false;
}
if (expressionType.isInterface()) {
if (castType.isArrayType()) {
// ----- (castTb.isArray) expressionTb.isInterface ------
if (scope.isJavaLangCloneable(expressionType)
|| scope.isJavaIoSerializable(expressionType))
// potential runtime error
{
return true;
}
return false;
}
if (castType.isClass()) {
// ----- (castTb.isClass) expressionTb.isInterface --------
if (scope.isJavaLangObject(castType))
return true;
if (((ReferenceBinding) castType).isFinal()) {
// no subclass for castTb, thus compile-time check is
// valid
if (castType.isCompatibleWith(expressionType)) {
return true;
}
return false;
}
return true;
}
if (castType.isInterface()) {
// ----- (castTb.isInterface) expressionTb.isInterface
// -------
if ((Scope.compareTypes(castType, expressionType) == NotRelated)) {
MethodBinding[] castTbMethods = ((ReferenceBinding) castType)
.methods();
int castTbMethodsLength = castTbMethods.length;
MethodBinding[] expressionTbMethods = ((ReferenceBinding) expressionType)
.methods();
int expressionTbMethodsLength = expressionTbMethods.length;
for (int i = 0; i < castTbMethodsLength; i++) {
for (int j = 0; j < expressionTbMethodsLength; j++) {
if (castTbMethods[i].selector == expressionTbMethods[j].selector) {
if (castTbMethods[i].returnType != expressionTbMethods[j].returnType) {
if (castTbMethods[i]
.areParametersEqual(expressionTbMethods[j])) {
return false;
}
}
}
}
}
}
return true;
}
return false;
}
return false;
}
}
/**
* Code generation for instanceOfExpression
*
* @param currentScope
* net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
* @param codeStream
* net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
* @param valueRequired
* boolean
*/
// public void generateCode(
// BlockScope currentScope,
// CodeStream codeStream,
// boolean valueRequired) {
//
// int pc = codeStream.position;
// expression.generateCode(currentScope, codeStream, true);
// codeStream.instance_of(type.resolvedType);
// if (!valueRequired)
// codeStream.pop();
// codeStream.recordPositionsFrom(pc, this.sourceStart);
// }
public TypeBinding resolveType(BlockScope scope) {
constant = NotAConstant;
TypeBinding expressionType = expression.resolveType(scope);
TypeBinding checkType = type.resolveType(scope);
if (expressionType == null || checkType == null)
return null;
if (!areTypesCastCompatible(scope, checkType, expressionType)) {
scope.problemReporter().notCompatibleTypesError(this,
expressionType, checkType);
return null;
}
this.resolvedType = BooleanBinding;
return BooleanBinding;
}
public StringBuffer printExpressionNoParenthesis(int indent,
StringBuffer output) {
expression.printExpression(indent, output).append(" instanceof "); //$NON-NLS-1$
return type.print(0, output);
}
public String toStringExpressionNoParenthesis() {
return expression.toStringExpression() + " instanceof " + //$NON-NLS-1$
type.toString(0);
}
public void traverse(ASTVisitor visitor, BlockScope scope) {
if (visitor.visit(this, scope)) {
expression.traverse(visitor, scope);
type.traverse(visitor, scope);
}
visitor.endVisit(this, scope);
}
}
The table below shows all metrics for InstanceOfExpression.java.




