package org.eclipse.jdt.internal.compiler.ast; | |
/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved. | |
*/ | |
import org.eclipse.jdt.internal.compiler.IAbstractSyntaxTreeVisitor; | |
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 ArrayInitializer extends Expression { | |
public Expression[] expressions; | |
public ArrayBinding binding; //the type of the { , , , } | |
/** | |
* ArrayInitializer constructor comment. | |
*/ | |
public ArrayInitializer() { | |
super(); | |
} | |
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { | |
if (expressions != null) { | |
for (int i = 0, max = expressions.length; i < max; i++) { | |
flowInfo = expressions[i].analyseCode(currentScope, flowContext, flowInfo).unconditionalInits(); | |
} | |
} | |
return flowInfo; | |
} | |
/** | |
* Code generation for a array initializer | |
*/ | |
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) { | |
// Flatten the values and compute the dimensions, by iterating in depth into nested array initializers | |
int pc = codeStream.position; | |
int expressionLength = (expressions == null) ? 0: expressions.length; | |
codeStream.generateInlinedValue(expressionLength); | |
codeStream.newArray(currentScope, binding); | |
if (expressions != null) { | |
// binding is an ArrayType, so I can just deal with the dimension | |
int elementsTypeID = binding.dimensions > 1 ? -1 : binding.leafComponentType.id; | |
for (int i = 0; i < expressionLength; i++) { | |
Expression expr; | |
if ((expr = expressions[i]).constant != NotAConstant) { | |
switch (elementsTypeID) { // filter out initializations to default values | |
case T_int : | |
case T_short : | |
case T_byte : | |
case T_char : | |
case T_float : | |
case T_long : | |
case T_double : | |
if (expr.constant.doubleValue() != 0) { | |
codeStream.dup(); | |
codeStream.generateInlinedValue(i); | |
expr.generateCode(currentScope, codeStream, true); | |
codeStream.arrayAtPut(elementsTypeID, false); | |
} | |
break; | |
case T_boolean : | |
if (expr.constant.booleanValue() != false) { | |
codeStream.dup(); | |
codeStream.generateInlinedValue(i); | |
expr.generateCode(currentScope, codeStream, true); | |
codeStream.arrayAtPut(elementsTypeID, false); | |
} | |
break; | |
default : | |
if (expr.constant != NullConstant.Default) { | |
codeStream.dup(); | |
codeStream.generateInlinedValue(i); | |
expr.generateCode(currentScope, codeStream, true); | |
codeStream.arrayAtPut(elementsTypeID, false); | |
} | |
} | |
} else { | |
codeStream.dup(); | |
codeStream.generateInlinedValue(i); | |
expr.generateCode(currentScope, codeStream, true); | |
codeStream.arrayAtPut(elementsTypeID, false); | |
} | |
} | |
} | |
if (!valueRequired) { | |
codeStream.pop(); | |
} | |
codeStream.recordPositionsFrom(pc, this); | |
} | |
public TypeBinding resolveTypeExpecting(BlockScope scope, TypeBinding expectedTb) { | |
// Array initializers can only occur on the right hand side of an assignment | |
// expression, therefore the expected type contains the valid information | |
// concerning the type that must be enforced by the elements of the array initializer. | |
// this method is recursive... (the test on isArrayType is the stop case) | |
constant = NotAConstant; | |
if (expectedTb.isArrayType()) { | |
binding = (ArrayBinding) expectedTb; | |
if (expressions == null) | |
return binding; | |
TypeBinding expectedElementsTb = binding.elementsType(scope); | |
if (expectedElementsTb.isBaseType()) { | |
for (int i = 0, length = expressions.length; i < length; i++) { | |
Expression expression = expressions[i]; | |
TypeBinding expressionTb = | |
(expression instanceof ArrayInitializer) | |
? expression.resolveTypeExpecting(scope, expectedElementsTb) | |
: expression.resolveType(scope); | |
if (expressionTb == null) | |
return null; | |
// Compile-time conversion required? | |
if (expression.isConstantValueOfTypeAssignableToType(expressionTb, expectedElementsTb)) { | |
expression.implicitWidening(expectedElementsTb, expressionTb); | |
} else if (BaseTypeBinding.isWidening(expectedElementsTb.id, expressionTb.id)) { | |
expression.implicitWidening(expectedElementsTb, expressionTb); | |
} else { | |
scope.problemReporter().typeMismatchErrorActualTypeExpectedType(expression, expressionTb, expectedElementsTb); | |
return null; | |
} | |
} | |
} else { | |
for (int i = 0, length = expressions.length; i < length; i++) | |
if (expressions[i].resolveTypeExpecting(scope, expectedElementsTb) == null) | |
return null; | |
} | |
return binding; | |
} | |
TypeBinding elementTb = (expressions == null) ? scope.getJavaLangObject() : expressions[0].resolveType(scope); | |
if (elementTb != null) { | |
TypeBinding probableTb = scope.createArray(elementTb, 1); | |
scope.problemReporter().typeMismatchErrorActualTypeExpectedType(this, probableTb, expectedTb); | |
} | |
return null; | |
} | |
public String toStringExpression() { | |
/* slow code */ | |
String s = "{"/*nonNLS*/ ; | |
if (expressions != null) | |
{ int j = 20 ; | |
for (int i = 0 ; i < expressions.length ; i++) | |
{ s = s + expressions[i].toStringExpression() + ","/*nonNLS*/ ; | |
j -- ; | |
if (j == 0) | |
{ s = s + "\n "/*nonNLS*/; j = 20;}}}; | |
s = s + "}"/*nonNLS*/; | |
return s;} | |
public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) { | |
if (visitor.visit(this, scope)) { | |
if (expressions != null) { | |
int expressionsLength = expressions.length; | |
for (int i = 0; i < expressionsLength; i++) | |
expressions[i].traverse(visitor, scope); | |
} | |
} | |
visitor.endVisit(this, scope); | |
} | |
} |