ArrayInitializer.java
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net.sourceforge.phpdt.internal.compiler.ast |
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PHPeclipse |
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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.BaseTypeBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
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_long :
// if (expr.constant.longValue() != 0) {
// codeStream.dup();
// codeStream.generateInlinedValue(i);
// expr.generateCode(currentScope, codeStream, true);
// codeStream.arrayAtPut(elementsTypeID, false);
// }
// break;
// case T_float :
// case T_double :
// double constantValue = expr.constant.doubleValue();
// if (constantValue == -0.0 || constantValue != 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 instanceof NullLiteral)) {
// codeStream.dup();
// codeStream.generateInlinedValue(i);
// expr.generateCode(currentScope, codeStream, true);
// codeStream.arrayAtPut(elementsTypeID, false);
// }
// }
// } else if (!(expr instanceof NullLiteral)) {
// codeStream.dup();
// codeStream.generateInlinedValue(i);
// expr.generateCode(currentScope, codeStream, true);
// codeStream.arrayAtPut(elementsTypeID, false);
// }
// }
// }
// if (!valueRequired) {
// codeStream.pop();
// }
// codeStream.recordPositionsFrom(pc, this.sourceStart);
// }
public StringBuffer printExpression(int indent, StringBuffer output) {
output.append('{');
if (expressions != null) {
int j = 20;
for (int i = 0; i < expressions.length; i++) {
if (i > 0)
output.append(", "); //$NON-NLS-1$
expressions[i].printExpression(0, output);
j--;
if (j == 0) {
output.append('\n');
printIndent(indent + 1, output);
j = 20;
}
}
}
return output.append('}');
}
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;
}
// infer initializer type for error reporting based on first element
TypeBinding leafElementType = null;
int dim = 1;
if (expressions == null) {
leafElementType = scope.getJavaLangObject();
} else {
Expression currentExpression = expressions[0];
while (currentExpression != null
&& currentExpression instanceof ArrayInitializer) {
dim++;
Expression[] subExprs = ((ArrayInitializer) currentExpression).expressions;
if (subExprs == null) {
leafElementType = scope.getJavaLangObject();
currentExpression = null;
break;
}
currentExpression = ((ArrayInitializer) currentExpression).expressions[0];
}
if (currentExpression != null) {
leafElementType = currentExpression.resolveType(scope);
}
}
if (leafElementType != null) {
TypeBinding probableTb = scope.createArray(leafElementType, dim);
scope.problemReporter().typeMismatchErrorActualTypeExpectedType(
this, probableTb, expectedTb);
}
return null;
}
public String toStringExpression() {
String s = "{"; //$NON-NLS-1$
if (expressions != null) {
int j = 20;
for (int i = 0; i < expressions.length; i++) {
s = s + expressions[i].toStringExpression() + ","; //$NON-NLS-1$
j--;
if (j == 0) {
s = s + "\n ";j = 20;}}}; //$NON-NLS-1$
s = s + "}"; //$NON-NLS-1$
return s;
}
public void traverse(ASTVisitor 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);
}
}
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