Examples with TryCatchFinallyVisitor lucee.transformer.bytecode.visitor.TryCatchFinallyVisitor used on opensource projects

Example 6 with TryCatchFinallyVisitor

use of lucee.transformer.bytecode.visitor.TryCatchFinallyVisitor in project Lucee by lucee.

the class TagTry2 method _writeOut.

@Override
public void _writeOut(BytecodeContext bc) throws TransformerException {
    GeneratorAdapter adapter = bc.getAdapter();
    adapter.visitLabel(begin);
    Body tryBody = new BodyBase(getFactory());
    List<Tag> catches = new ArrayList<Tag>();
    Tag tmpFinal = null;
    tryBody.setParent(getBody().getParent());
    List<Statement> statements = getBody().getStatements();
    Statement stat;
    Tag tag;
    {
        Iterator<Statement> it = statements.iterator();
        while (it.hasNext()) {
            stat = it.next();
            if (stat instanceof Tag) {
                tag = (Tag) stat;
                if (tag.getTagLibTag().getTagClassDefinition().isClassNameEqualTo("lucee.runtime.tag.Catch")) {
                    catches.add(tag);
                    continue;
                } else if (tag.getTagLibTag().getTagClassDefinition().isClassNameEqualTo("lucee.runtime.tag.Finally")) {
                    tmpFinal = tag;
                    continue;
                }
            }
            tryBody.addStatement(stat);
        }
        ;
    }
    final Tag _finally = tmpFinal;
    // has no try body, if there is no try body, no catches are executed, only finally
    if (!tryBody.hasStatements()) {
        if (_finally != null && _finally.getBody() != null) {
            BodyBase.writeOut(bc, _finally.getBody());
        // ExpressionUtil.writeOut(_finally.getBody(), bc);
        }
        return;
    }
    TryCatchFinallyVisitor tcfv = new TryCatchFinallyVisitor(new OnFinally() {

        @Override
        public void _writeOut(BytecodeContext bc) throws TransformerException {
            if (_finally != null) {
                ExpressionUtil.visitLine(bc, _finally.getStart());
                BodyBase.writeOut(bc, _finally.getBody());
            // ExpressionUtil.writeOut(_finally.getBody(), bc);
            }
        }
    }, getFlowControlFinal());
    // Try
    tcfv.visitTryBegin(bc);
    BodyBase.writeOut(bc, tryBody);
    // ExpressionUtil.writeOut(tryBody, bc);
    int e = tcfv.visitTryEndCatchBeging(bc);
    // if(e instanceof lucee.runtime.exp.Abort) throw e;
    Label abortEnd = new Label();
    adapter.loadLocal(e);
    // Abort.isAbort(t);
    adapter.invokeStatic(Types.ABORT, TryCatchFinally.IS_ABORT);
    // adapter.instanceOf(Types.ABORT);
    adapter.ifZCmp(Opcodes.IFEQ, abortEnd);
    adapter.loadLocal(e);
    adapter.throwException();
    adapter.visitLabel(abortEnd);
    // PageExceptionImpl old=pc.getCatch();
    int oldPE = adapter.newLocal(Types.PAGE_EXCEPTION);
    int oldName = adapter.newLocal(Types.STRING);
    adapter.loadArg(0);
    adapter.invokeVirtual(Types.PAGE_CONTEXT, GET_CATCH);
    adapter.storeLocal(oldPE);
    adapter.loadArg(0);
    adapter.checkCast(Types.PAGE_CONTEXT_IMPL);
    adapter.invokeVirtual(Types.PAGE_CONTEXT_IMPL, GET_CATCH_NAME);
    adapter.storeLocal(oldName);
    // PageException pe=Caster.toPageEception(e);
    int pe = adapter.newLocal(Types.PAGE_EXCEPTION);
    adapter.loadLocal(e);
    adapter.invokeStatic(Types.CASTER, TO_PAGE_EXCEPTION);
    adapter.storeLocal(pe);
    Iterator<Tag> it = catches.iterator();
    Attribute attrType;
    Expression type;
    Label endAllIfs = new Label();
    Tag tagElse = null;
    while (it.hasNext()) {
        tag = it.next();
        Label endIf = new Label();
        // type
        attrType = tag.getAttribute("type");
        type = bc.getFactory().createLitString("any");
        if (attrType != null)
            type = attrType.getValue();
        if (type instanceof LitString && ((LitString) type).getString().equalsIgnoreCase("any")) {
            tagElse = tag;
            continue;
        }
        ExpressionUtil.visitLine(bc, tag.getStart());
        // if(pe.typeEqual(@type)
        adapter.loadLocal(pe);
        type.writeOut(bc, Expression.MODE_REF);
        adapter.invokeVirtual(Types.PAGE_EXCEPTION, TYPE_EQUAL);
        adapter.ifZCmp(Opcodes.IFEQ, endIf);
        catchBody(bc, adapter, tag, pe, true, true, extractName(tag));
        adapter.visitJumpInsn(Opcodes.GOTO, endAllIfs);
        adapter.visitLabel(endIf);
    }
    // else
    if (tagElse != null) {
        catchBody(bc, adapter, tagElse, pe, true, true, extractName(tagElse));
    } else {
        // pc.setCatch(pe,true);
        adapter.loadArg(0);
        adapter.loadLocal(pe);
        adapter.push(false);
        adapter.push(true);
        adapter.invokeVirtual(Types.PAGE_CONTEXT, SET_CATCH3);
        // throw pe;
        adapter.loadLocal(pe);
        adapter.throwException();
    }
    adapter.visitLabel(endAllIfs);
    adapter.loadLocal(oldName);
    Label notNull = new Label();
    adapter.visitJumpInsn(Opcodes.IFNONNULL, notNull);
    // NULL
    adapter.loadArg(0);
    adapter.loadLocal(oldPE);
    adapter.invokeVirtual(Types.PAGE_CONTEXT, SET_CATCH_PE);
    Label end = new Label();
    adapter.visitJumpInsn(Opcodes.GOTO, end);
    adapter.visitLabel(notNull);
    // NOT NULL
    adapter.loadArg(0);
    adapter.checkCast(Types.PAGE_CONTEXT_IMPL);
    adapter.loadLocal(oldPE);
    adapter.loadLocal(oldName);
    adapter.invokeVirtual(Types.PAGE_CONTEXT_IMPL, SET_CATCH_PE2);
    adapter.visitLabel(end);
    tcfv.visitCatchEnd(bc);
}