Examples of org.apache.tapestry5.internal.plastic.asm.Label

Package org.apache.tapestry5.internal.plastic.asm

Examples of org.apache.tapestry5.internal.plastic.asm.Label

org.apache.tapestry5.internal.plastic.asm.Label
A label represents a position in the bytecode of a method. Labels are used for jump, goto, and switch instructions, and for try catch blocks. A label designates the instruction that is just after. Note however that there can be other elements between a label and the instruction it designates (such as other labels, stack map frames, line numbers, etc.). @author Eric Bruneton


    private void doCatch(String exceptionInternalName, InstructionBuilderCallback callback)
    {
        check();


        Label handler = state.newLabel();


        callback.doBuild(builder);


        state.visitor.visitTryCatchBlock(startLabel, endLabel, handler, exceptionInternalName);
    }

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        check();


        assert condition != null;
        assert callback != null;


        Label ifFalseLabel = new Label();
        Label endIfLabel = new Label();


        v.visitJumpInsn(conditionToOpcode.get(condition), ifFalseLabel);


        new InstructionBuilderCallback()
        {

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        check();


        assert condition != null;
        assert callback != null;


        Label doCheck = state.newLabel();


        Label exitLoop = new Label();


        new InstructionBuilderCallback()
        {
            @Override
            public void doBuild(InstructionBuilder builder)

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        this.builder = builder;
        this.state = state;
        this.min = min;
        this.max = max;


        defaultLabel = new Label();
        endSwitchLabel = new Label();


        caseLabels = new Label[max - min + 1];


        for (int i = min; i <= max; i++)
        {
            caseLabels[i - min] = new Label();
        }


        state.visitor.visitTableSwitchInsn(min, max, defaultLabel, caseLabels);
    }

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        check();


        assert condition != null;
        assert callback != null;


        Label ifFalseLabel = new Label();
        Label endIfLabel = new Label();


        v.visitJumpInsn(conditionToOpcode.get(condition), ifFalseLabel);


        new InstructionBuilderCallback()
        {

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        check();


        assert condition != null;
        assert callback != null;


        Label doCheck = state.newLabel();


        Label exitLoop = new Label();


        new InstructionBuilderCallback()
        {
            public void doBuild(InstructionBuilder builder)
            {

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        return LABEL;
    }


    public Label getLabel() {
        if (label == null) {
            label = new Label();
        }
        return label;
    }

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            }
            return sb.toString();
        }


        protected final Label getLabel(final Object label) {
            Label lbl = (Label) labels.get(label);
            if (lbl == null) {
                lbl = new Label();
                labels.put(label, lbl);
            }
            return lbl;
        }

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     * TryCatchRule
     */
    final class TryCatchRule extends Rule {


        public final void begin(final String name, final Attributes attrs) {
            Label start = getLabel(attrs.getValue("start"));
            Label end = getLabel(attrs.getValue("end"));
            Label handler = getLabel(attrs.getValue("handler"));
            String type = attrs.getValue("type");
            getCodeVisitor().visitTryCatchBlock(start, end, handler, type);
        }

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     */
    final class LineNumberRule extends Rule {


        public final void begin(final String name, final Attributes attrs) {
            int line = Integer.parseInt(attrs.getValue("line"));
            Label start = getLabel(attrs.getValue("start"));
            getCodeVisitor().visitLineNumber(line, start);
        }

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