adalogo.visitor
Class SymbolTable
java.lang.Object
adalogo.visitor.SymbolTable
public class SymbolTable
extends java.lang.Object
this will store the symbol tables
used during interpretation of adalogo code
void | addSymTabChangedListener(SymbolTable.SymbolTableListener listener) - HLT
method to add SymTabChangedListener into EventListeners
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void | fireLevelDown() - HLT
fire Event methods
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void | fireLevelUp() - HLT
fire Event methods
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void | fireNewVariable(Object name) - HLT
fire Event methods
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void | fireValueChanged(Object name) - HLT
fire Event methods
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ListIterator | getIterator() - HLT temporary solution for the VarMonitor.
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Object | getType(Object name) - get the type of the variable name.
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String | getType(String name) - get the type of the variable name, returns String.
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Object | getValue(Object name) - get the value of the variable name.
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String | getValue(String name) - get the value of the variable name, returns String.
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void | levelDown() - use this when going out of a declarative part.
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void | levelUp() - use this when going in to a declarative part
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void | put(Object name, Object type, Object value) - add a value to the symbol table.
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void | setValue(Object name, Object value) - set a new value for an alreay existing variable.
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boolean | variableExists(Object name) - Search in the SymbolTable for name and return true if exists,
false otherwise.
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SymbolTable
public SymbolTable()
addSymTabChangedListener
public void addSymTabChangedListener(SymbolTable.SymbolTableListener listener)
HLT
method to add SymTabChangedListener into EventListeners
fireLevelDown
public void fireLevelDown()
HLT
fire Event methods
fireLevelUp
public void fireLevelUp()
HLT
fire Event methods
fireNewVariable
public void fireNewVariable(Object name)
HLT
fire Event methods
fireValueChanged
public void fireValueChanged(Object name)
HLT
fire Event methods
getIterator
public ListIterator getIterator()
HLT temporary solution for the VarMonitor. VarMonitor needs access to the
whole symboltable to work.
getType
public String getType(String name)
throws SymbolTable.SymbolTableException
get the type of the variable name, returns String.
throws exception if variable not found.
getValue
public String getValue(String name)
throws SymbolTable.SymbolTableException
get the value of the variable name, returns String.
throws exception if variable not found.
levelUp
public void levelUp()
use this when going in to a declarative part
put
public void put(Object name,
Object type,
Object value)
throws SymbolTable.SymbolTableException
add a value to the symbol table.
throws exception if variable already exists.
setValue
public void setValue(Object name,
Object value)
throws SymbolTable.SymbolTableException
set a new value for an alreay existing variable.
throws exception if variable not found.
variableExists
public boolean variableExists(Object name)
Search in the SymbolTable for name and return true if exists,
false otherwise.