step9
Class bi

java.lang.Object
  step9.i
      step9.bi

All Implemented Interfaces:

Visitor

Direct Known Subclasses:

bdis

public class bi
extends i

rewrites Node trees as typed trees. Infrastructure and support for bi.BooleanT and i.IntegerT. Naming convention: the suffix T indicates a type.

Nested Class Summary

static class	bi.BAnd and of two bi.BooleanT trees.
static class	bi.BAndIf and-if of two bi.BooleanT trees.
static class	bi.BEq equal of two bi.BooleanT trees.
static class	bi.BNe not-equal of two bi.BooleanT trees.
static class	bi.BNot negate a bi.BooleanT tree.
static class	bi.BooleanT base class for boolean operations, itself used to type an Boolean leaf.
static class	bi.BOr or of two bi.BooleanT trees.
static class	bi.BOrIf or-if of two bi.BooleanT trees.
static class	bi.BPrint print a bi.BooleanT object.
static class	bi.BXor xor of two bi.BooleanT trees.
static class	bi.IEq equal of two i.IntegerT trees.
static class	bi.IGe greater-equal of two i.IntegerT trees.
static class	bi.IGt greater-then of two i.IntegerT trees.
static class	bi.ILe less-equal of two i.IntegerT trees.
static class	bi.ILt less-then of two i.IntegerT trees.
static class	bi.INe not-equal of two i.IntegerT trees.

Nested classes/interfaces inherited from class step9.i

i.IAdd, i.IAnd, i.IDiv, i.ILsh, i.IMinus, i.IMod, i.IMul, i.INeg, i.IntegerT, i.IOr, i.IPrint, i.IRsh, i.ISub, i.IXor, i.T

Field Summary

protected HashMap	_rules maps class to array of Rule.
protected PrintStream	out print action stream.

Constructor Summary

bi()

Method Summary

Object	BAnd(ArrayList sub) factory method: and of two bi.BooleanT trees.
Object	BAndIf(ArrayList sub) factory method: and-if of two bi.BooleanT trees.
Object	BEq(ArrayList sub) factory method: equal of two bi.BooleanT trees.
Object	BNe(ArrayList sub) factory method: not-equal of two bi.BooleanT trees.
Object	BNot(ArrayList sub) factory method: negate a bi.BooleanT tree.
bi.BooleanT	BooleanT(Boolean b) factory method: type a Boolean leaf.
Object	BOr(ArrayList sub) factory method: or of two bi.BooleanT trees.
Object	BOrIf(ArrayList sub) factory method: or-if of two bi.BooleanT trees.
Object	BPrint(bi.BooleanT sub) factory method: print a bi.BooleanT object.
Object	BXor(ArrayList sub) factory method: xor of two bi.BooleanT trees.
Object	IEq(ArrayList sub) factory method: equal of two i.IntegerT trees.
Object	IGe(ArrayList sub) factory method: greater-equal of two i.IntegerT trees.
Object	IGt(ArrayList sub) factory method: greater-then of two i.IntegerT trees.
Object	ILe(ArrayList sub) factory method: less-equal of two i.IntegerT trees.
Object	ILt(ArrayList sub) factory method: less-then of two i.IntegerT trees.
Object	INe(ArrayList sub) factory method: not-equal of two i.IntegerT trees.
static void	main(String[] args) type lines with integer and boolean expressions.
protected PrintStream	out() returns print action stream.
Object	visit(int _action, Object _object) visits an object.
Object	visit(Object object) visits an object.
Object	visit0(Object object) visits an object, ignoring possible descendants.

Methods inherited from class step9.i

classname, IAdd, IAnd, IDiv, ILsh, IMinus, IMod, IMul, INeg, IntegerT, IOr, IPrint, IRsh, ISub, IXor, prefix

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

out

protected transient PrintStream out

print action stream. Can be replaced to reroute output. BUG: should be a self-flushing PrintWriter.

_rules

protected final HashMap _rules

maps class to array of Rule.

Constructor Detail

bi

public bi()

Method Detail

out

protected PrintStream out()

returns print action stream. Defaults to System.out.

Overrides:

out in class i

visit

public Object visit(Object object)
             throws Exception

visits an object. This is a facade for the class search.

Specified by:

visit in interface Visitor

Overrides:

visit in class i

Parameters:

object - to be visited, not null.

Returns:

result of action.

Throws:

NoRuleException - if no rule can be found.

Exception

See Also:

Rule.visit(jag.Visitor, java.util.HashMap, java.lang.Object, int, java.util.List)

visit0

public Object visit0(Object object)
              throws Exception

visits an object, ignoring possible descendants. This is a facade for the class search with degree zero.

Specified by:

visit0 in interface Visitor

Overrides:

visit0 in class i

Parameters:

object - to be visited, not null.

Returns:

result of action.

Throws:

NoRuleException - if no rule can be found.

Exception

See Also:

Rule.visit(jag.Visitor, java.util.HashMap, java.lang.Object, int, java.util.List)

visit

public Object visit(int _action,
                    Object _object)
             throws Exception

visits an object.

Specified by:

visit in interface Visitor

Overrides:

visit in class i

Parameters:

_action - index.

_object - to be visited, not null.

Returns:

result of action.

Throws:

NoRuleException - if no rule can be found.

Exception

BooleanT

public bi.BooleanT BooleanT(Boolean b)

factory method: type a Boolean leaf.

main

public static void main(String[] args)
                 throws Exception

type lines with integer and boolean expressions.

Throws:

Exception

BPrint

public Object BPrint(bi.BooleanT sub)

factory method: print a bi.BooleanT object.

BOrIf

public Object BOrIf(ArrayList sub)

factory method: or-if of two bi.BooleanT trees.

BAndIf

public Object BAndIf(ArrayList sub)

factory method: and-if of two bi.BooleanT trees.

BOr

public Object BOr(ArrayList sub)

factory method: or of two bi.BooleanT trees.

BXor

public Object BXor(ArrayList sub)

factory method: xor of two bi.BooleanT trees.

BAnd

public Object BAnd(ArrayList sub)

factory method: and of two bi.BooleanT trees.

BEq

public Object BEq(ArrayList sub)

factory method: equal of two bi.BooleanT trees.

BNe

public Object BNe(ArrayList sub)

factory method: not-equal of two bi.BooleanT trees.

BNot

public Object BNot(ArrayList sub)

factory method: negate a bi.BooleanT tree.

ILt

public Object ILt(ArrayList sub)

factory method: less-then of two i.IntegerT trees.

ILe

public Object ILe(ArrayList sub)

factory method: less-equal of two i.IntegerT trees.

IGt

public Object IGt(ArrayList sub)

factory method: greater-then of two i.IntegerT trees.

IGe

public Object IGe(ArrayList sub)

factory method: greater-equal of two i.IntegerT trees.

IEq

public Object IEq(ArrayList sub)

factory method: equal of two i.IntegerT trees.

INe

public Object INe(ArrayList sub)

factory method: not-equal of two i.IntegerT trees.