| 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.codegen.*; |
| import org.eclipse.jdt.internal.compiler.flow.*; |
| import org.eclipse.jdt.internal.compiler.lookup.*; |
| |
| 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) { |
| |
| // need to check that exception thrown is actually caught somewhere |
| |
| exception.analyseCode(currentScope, flowContext, flowInfo); |
| flowContext.checkExceptionHandlers(exceptionType, this, flowInfo, currentScope); |
| return FlowInfo.DeadEnd; |
| } |
| /** |
| * Throw code generation |
| * |
| * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope |
| * @param codeStream org.eclipse.jdt.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); |
| |
| } |
| public void resolve(BlockScope scope) { |
| exceptionType = exception.resolveTypeExpecting(scope, scope.getJavaLangThrowable()); |
| if (exceptionType == NullBinding) |
| scope.problemReporter().cannotThrowNull(this); |
| exception.implicitWidening(exceptionType, exceptionType); |
| } |
| /* SHOULDN'T IT RATHER DO - |
| scope.checkThrowable(exceptionType = expression.resolveType(scope)); |
| */ |
| public String toString(int tab){ |
| /* slow code */ |
| |
| String s = tabString(tab) ; |
| s = s + "throw "/*nonNLS*/; |
| s = s + exception.toStringExpression() ; |
| return s; |
| } |
| public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope blockScope) { |
| if (visitor.visit(this, blockScope)) { |
| exception.traverse(visitor, blockScope); |
| } |
| visitor.endVisit(this, blockScope); |
| } |
| } |