org.zmpp.vm
Class Objects

java.lang.Object
  org.zmpp.vm.Objects

All Implemented Interfaces:

ObjectTree

public class Objects
extends Object
implements ObjectTree

This class represents the object table.

Version:

1.0

Author:

Wei-ju Wu

Constructor Summary

Objects(MemoryAccess memaccess, int address)
Constructor.

Method Summary

int	getNumObjects() Returns the total number of objects.
ZObject	getObject(int objectNum) Returns the Z-object with the specified object number.
short	getPropertyDefault(int propertyNum) Returns the property default value at the specified position in the property defaults table.
int	getPropertyLength(int propertyAddress) Determines the length of the property at the specified address.
void	insertObject(int parentNum, int objectNum) Inserts an object to a new parent.
void	removeObject(int objectNum) Removes an object from its parent.

Methods inherited from class java.lang.Object

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

Constructor Detail

Objects

public Objects(MemoryAccess memaccess,
               int address)

Constructor.

Parameters:

memaccess - the memory access object

address - the object table's start address

Method Detail

getPropertyDefault

public short getPropertyDefault(int propertyNum)

Returns the property default value at the specified position in the property defaults table.

Specified by:

getPropertyDefault in interface ObjectTree

Parameters:

propertyNum - the default entry's propery number

Returns:

the property default value

getNumObjects

public int getNumObjects()

Returns the total number of objects.

Specified by:

getNumObjects in interface ObjectTree

Returns:

the number of objects

getObject

public ZObject getObject(int objectNum)

Returns the Z-object with the specified object number. The index is 1 based

Specified by:

getObject in interface ObjectTree

Parameters:

objectNum - object number

Returns:

the z object with the specified number

removeObject

public void removeObject(int objectNum)

Removes an object from its parent.

Specified by:

removeObject in interface ObjectTree

Parameters:

objectNum - the object number

insertObject

public void insertObject(int parentNum,
                         int objectNum)

Inserts an object to a new parent.

Specified by:

insertObject in interface ObjectTree

Parameters:

parentNum - the parent number

objectNum - the object number

getPropertyLength

public int getPropertyLength(int propertyAddress)

Determines the length of the property at the specified address. The address is an address returned by ZObject.getPropertyAddress, i.e. it is starting after the length byte.

Specified by:

getPropertyLength in interface ObjectTree

Parameters:

propertyAddress - the property address

Returns:

the length