Examples of serp.bytecode.LookupSwitchInstruction

serp.bytecode.LookupSwitchInstruction
The lookupswitch instruction. @author Abe White

                (code, IllegalArgumentException.class));
        }
        else {
            // In mixed access mode, property indexes are not +1 incremental 
            // a lookup switch must be used to do indexed lookup.
            LookupSwitchInstruction lookupins = code.lookupswitch();
            
            for (Integer i : propFmds) {
                lookupins.addCase(i,
                    code.constant().setValue(
                    _attrsToFields.get(fmds[i].getName())));
                code.areturn();
            }            
            // default: throw new IllegalArgumentException ()
            lookupins.setDefaultTarget(throwException
                (code, IllegalArgumentException.class));
        }
        
        code.calculateMaxLocals();
        code.calculateMaxStack();

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            Instruction target = code.aload().setLocal(obj);
            code.previous();


            // switch(i)
            code.iload().setParam(1);
            LookupSwitchInstruction lswitch = code.lookupswitch();
            FieldMetaData[] fields = meta.getFields();
            int cacheable = 0;
            for (int i = 0; i < fields.length; i++) {
                if (!usesImplData(fields[i]))
                    continue;
                // case x: obj = fieldImpl[y]; break;
                lswitch.addCase(i, code.aload().setThis());
                code.getfield().setField(impl);
                code.constant().setValue(cacheable++);
                code.aaload();
                code.astore().setLocal(obj);
                code.go2().setTarget(target);
            }
            lswitch.setDefaultTarget(target);


            // if (obj != null)
            code.next();    // jump back over target
            ifins = code.ifnonnull();
            code.vreturn();


            // sm.setImplData(index, impl);
            ifins.setTarget(code.aload().setParam(0));
            code.iload().setParam(1);
            code.aload().setLocal(obj);
            code.invokeinterface().setMethod(OpenJPAStateManager.class,
                "setImplData", void.class,
                new Class[]{ int.class, Object.class });
            code.vreturn();
        }
        code.calculateMaxLocals();
        code.calculateMaxStack();


        // void storeImplData(OpenJPAStateManager sm, int index, boolean loaded)
        meth = bc.declareMethod("storeImplData", void.class,
            new Class[]{ OpenJPAStateManager.class, int.class, boolean.class });
        code = meth.getCode(true);
        if (count == 0)
            code.vreturn();
        else {
            // int arrIdx = -1;
            // switch(index)
            int arrIdx = code.getNextLocalsIndex();
            code.constant().setValue(-1);
            code.istore().setLocal(arrIdx);
            code.iload().setParam(1);
            LookupSwitchInstruction lswitch = code.lookupswitch();


            // establish switch target, then move before it
            Instruction switchTarget = code.iload().setLocal(arrIdx);
            code.previous();


            FieldMetaData[] fields = meta.getFields();
            int cacheable = 0;
            for (int i = 0; i < fields.length; i++) {
                if (!usesImplData(fields[i]))
                    continue;
                // case x: arrIdx = y; break;
                lswitch.addCase(i, code.constant().setValue(cacheable++));
                code.istore().setLocal(arrIdx);
                code.go2().setTarget(switchTarget);
            }
            lswitch.setDefaultTarget(switchTarget);
            code.next();    // step over switch target


            // if (arrIdx != -1)
            code.constant().setValue(-1);
            JumpInstruction ifins = code.ificmpne();

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                (code, IllegalArgumentException.class));
        }
        else {
            // In mixed access mode, property indexes are not +1 incremental 
            // a lookup switch must be used to do indexed lookup.
            LookupSwitchInstruction lookupins = code.lookupswitch();
            
            for (Integer i : propFmds) {
                lookupins.addCase(i,
                    code.constant().setValue(
                    _attrsToFields.get(fmds[i].getName())));
                code.areturn();
            }            
            // default: throw new IllegalArgumentException ()
            lookupins.setDefaultTarget(throwException
                (code, IllegalArgumentException.class));
        }
        
        code.calculateMaxLocals();
        code.calculateMaxStack();

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                (code, IllegalArgumentException.class));
        }
        else {
            // In mixed access mode, property indexes are not +1 incremental 
            // a lookup switch must be used to do indexed lookup.
            LookupSwitchInstruction lookupins = code.lookupswitch();
            
            for (Integer i : propFmds) {
                lookupins.addCase(i,
                    code.constant().setValue(
                    _attrsToFields.get(fmds[i].getName())));
                code.areturn();
            }            
            // default: throw new IllegalArgumentException ()
            lookupins.setDefaultTarget(throwException
                (code, IllegalArgumentException.class));
        }
        
        code.calculateMaxLocals();
        code.calculateMaxStack();

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