Example usage for org.eclipse.jdt.core.dom Statement delete

Introduction

In this page you can find the example usage for org.eclipse.jdt.core.dom Statement delete.

Prototype

public final void delete() 

Source Link

Document

Removes this node from its parent.

Usage

From source file:org.decojer.cavaj.transformers.TrControlFlowStmts.java

License:Open Source License

@Nullable
private TryStatement transformCatch(@Nonnull final Catch catchStruct) {
    final BB head = catchStruct.getHead();
    final TryStatement tryStatement = getAst().newTryStatement();
    final List<Statement> statements = tryStatement.getBody().statements();
    assert statements != null;
    transformSequence(catchStruct, head, statements);
    // now add handlers
    for (final E catchE : head.getOuts()) {
        if (!catchE.isCatch()) {
            continue;
        }//from w w  w  .j a  va2s. c o m
        final BB handler = catchE.getEnd();
        final T[] catchTypes = (T[]) catchE.getValue();
        assert catchTypes != null;
        if (!catchStruct.hasHandler(catchTypes, handler)) {
            continue;
        }
        // extract exception name from temporary throwable declaration, don't remove in CFG
        final Statement throwableDeclaration = handler.getStmt(0);
        assert throwableDeclaration instanceof VariableDeclarationStatement;
        final List<VariableDeclarationFragment> throwableDeclarationFragments = ((VariableDeclarationStatement) throwableDeclaration)
                .fragments();
        assert throwableDeclarationFragments.size() == 1;
        final VariableDeclarationFragment throwableDeclarationFragment = throwableDeclarationFragments.get(0);
        final SimpleName exceptionName = throwableDeclarationFragment.getName();
        assert exceptionName != null;

        if (catchE.isFinally()) {
            // finally handler
            tryStatement.setFinally(getAst().newBlock());
            final List<Statement> finallyStatements = tryStatement.getFinally().statements();
            assert finallyStatements != null;
            transformSequence(catchStruct, handler, finallyStatements);
            // remove temporary throwable declaration from finally block, could be nested
            Statement firstStatement = finallyStatements.get(0);
            if (firstStatement instanceof TryStatement) {
                firstStatement = (Statement) ((TryStatement) firstStatement).getBody().statements().get(0);
            }
            if (firstStatement instanceof VariableDeclarationStatement) {
                firstStatement.delete();
            }
            // remove final throws from finally block, should never be nested
            if (!finallyStatements.isEmpty()
                    && finallyStatements.get(finallyStatements.size() - 1) instanceof ThrowStatement) {
                finallyStatements.remove(finallyStatements.size() - 1);
            }
            continue;
        }
        // normal typed catch handler
        final CatchClause catchClause = getAst().newCatchClause();

        final SingleVariableDeclaration singleVariableDeclaration = getAst().newSingleVariableDeclaration();
        singleVariableDeclaration.setName((SimpleName) wrap(exceptionName));
        if (catchTypes.length == 1) {
            final T handlerType = catchTypes[0];
            assert handlerType != null;
            singleVariableDeclaration.setType(newType(handlerType, getM()));
        } else {
            // Multi-Catch
            final UnionType unionType = getAst().newUnionType();
            for (final T t : catchTypes) {
                assert t != null;
                unionType.types().add(newType(t, getM()));
            }
            singleVariableDeclaration.setType(unionType);
        }
        catchClause.setException(singleVariableDeclaration);

        tryStatement.catchClauses().add(catchClause);

        final List<Statement> handlerStatements = catchClause.getBody().statements();
        assert handlerStatements != null;
        transformSequence(catchStruct, handler, handlerStatements);
        // remove temporary throwable declaration from catch
        if (handlerStatements.isEmpty()) {
            log.warn(getM() + ": Missing temporary throwable declaration in handler statements for BB"
                    + handler.getPc() + ":\n" + catchStruct);
        } else {
            handlerStatements.remove(0);
        }
    }
    return tryStatement;
}

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