/******************************************************************************* | |
* Copyright (c) 2000, 2004 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 org.eclipse.wst.jsdt.internal.compiler.ast; | |
import org.eclipse.wst.jsdt.internal.compiler.ASTVisitor; | |
import org.eclipse.wst.jsdt.internal.compiler.classfmt.ClassFileConstants; | |
import org.eclipse.wst.jsdt.internal.compiler.codegen.CodeStream; | |
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowContext; | |
import org.eclipse.wst.jsdt.internal.compiler.flow.FlowInfo; | |
import org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope; | |
import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding; | |
public class ThrowStatement extends Statement { | |
public Expression exception; | |
public TypeBinding exceptionType; | |
public ThrowStatement(Expression exception, int startPosition) { | |
this.exception = exception; | |
this.sourceStart = startPosition; | |
this.sourceEnd = exception.sourceEnd; | |
} | |
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) { | |
exception.analyseCode(currentScope, flowContext, flowInfo); | |
// need to check that exception thrown is actually caught somewhere | |
flowContext.checkExceptionHandlers(exceptionType, this, flowInfo, currentScope); | |
return FlowInfo.DEAD_END; | |
} | |
/** | |
* Throw code generation | |
* | |
* @param currentScope org.eclipse.wst.jsdt.internal.compiler.lookup.BlockScope | |
* @param codeStream org.eclipse.wst.jsdt.internal.compiler.codegen.CodeStream | |
*/ | |
public void generateCode(BlockScope currentScope, CodeStream codeStream) { | |
if ((bits & IsReachableMASK) == 0) | |
return; | |
int pc = codeStream.position; | |
exception.generateCode(currentScope, codeStream, true); | |
codeStream.athrow(); | |
codeStream.recordPositionsFrom(pc, this.sourceStart); | |
} | |
public StringBuffer printStatement(int indent, StringBuffer output) { | |
printIndent(indent, output).append("throw "); //$NON-NLS-1$ | |
exception.printExpression(0, output); | |
return output.append(';'); | |
} | |
public void resolve(BlockScope scope) { | |
exceptionType = exception.resolveTypeExpecting(scope, scope.getJavaLangThrowable()); | |
if (exceptionType == NullBinding | |
&& scope.environment().options.complianceLevel <= ClassFileConstants.JDK1_3){ | |
// if compliant with 1.4, this problem will not be reported | |
scope.problemReporter().cannotThrowNull(this); | |
} | |
exception.computeConversion(scope, exceptionType, exceptionType); | |
} | |
public void traverse(ASTVisitor visitor, BlockScope blockScope) { | |
if (visitor.visit(this, blockScope)) | |
exception.traverse(visitor, blockScope); | |
visitor.endVisit(this, blockScope); | |
} | |
} |