multivalent
Class VObject

java.lang.Object
  multivalent.VObject

Direct Known Subclasses:

Behavior, Node

public abstract class VObject

extends java.lang.Object

Objects with a name and attributes. Superclass of Behavior and Node. Attributes are generally Strings, but VObjects that are not to be written to a hub can store any Object as the value. Most getters optionally take a second value, a default that's returned if the attribute does not exist or cannot be interpreted as the requested type, rather than throwing an exception in that case.

Also validate, statistics.

Version:

$Revision: 1.6 $ $Date: 2003/06/02 05:11:39 $

Field Summary

protected java.util.Map<java.lang.String,java.lang.Object>

attr_ All Behaviors and Nodes have attributes, that is, a set (possibly empty) of key, value pairs.

Constructor Summary

VObject()

Method Summary

java.util.Iterator<java.util.Map.Entry<java.lang.String,java.lang.Object>>	attrEntrySetIterator()
java.util.Iterator<java.lang.String>	attrKeysIterator()
boolean	checkRep() Checks "representation invariant" (see MIT SE), and returns true iff object is valid, which should be always
void	clearAttributes()
java.lang.String	getAttr(java.lang.String key)
java.lang.String	getAttr(java.lang.String key, java.lang.String default_) Same as getAttr(String), except if no such key, then return default_.
java.util.Map<java.lang.String,java.lang.Object>	getAttributes() Needed for scripting, testing and moving from ESISNode to real node, but not for general use.
Multivalent	getGlobal() Convenience method to global state in class Multivalent.
abstract java.lang.String	getName()
java.lang.Object	getValue(java.lang.String key) Return attribute value that might not be of type String.
boolean	hasAttributes() DOM2.
void	putAttr(java.lang.String key, java.lang.Object val) If val == null, remove attribute.
java.lang.Object	removeAttr(java.lang.String key) Returns old value of key.
void	setAttributes(java.util.Map<java.lang.String,java.lang.Object> attrs)

Methods inherited from class java.lang.Object

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

Field Detail

attr_

protected java.util.Map<java.lang.String,java.lang.Object> attr_

All Behaviors and Nodes have attributes, that is, a set (possibly empty) of key, value pairs. Attributes keys must be Strings, and are canonicalized to all lowercase. Values must be Strings. By default, attributes are kept in a CHashMap, which ignores that case of the key; if a HashMap is desired, create the object with one.

Constructor Detail

VObject

public VObject()

Method Detail

getName

public abstract java.lang.String getName()

getGlobal

public Multivalent getGlobal()

Convenience method to global state in class Multivalent.

getAttributes

public final java.util.Map<java.lang.String,java.lang.Object> getAttributes()

Needed for scripting, testing and moving from ESISNode to real node, but not for general use.

setAttributes

public final void setAttributes(java.util.Map<java.lang.String,java.lang.Object> attrs)

hasAttributes

public boolean hasAttributes()

DOM2.

getValue

public final java.lang.Object getValue(java.lang.String key)

Return attribute value that might not be of type String.

getAttr

public final java.lang.String getAttr(java.lang.String key)

getAttr

public final java.lang.String getAttr(java.lang.String key,
                                      java.lang.String default_)

Same as getAttr(String), except if no such key, then return default_.

putAttr

public final void putAttr(java.lang.String key,
                          java.lang.Object val)

If val == null, remove attribute.

removeAttr

public final java.lang.Object removeAttr(java.lang.String key)

Returns old value of key.

clearAttributes

public final void clearAttributes()

attrKeysIterator

public final java.util.Iterator<java.lang.String> attrKeysIterator()

attrEntrySetIterator

public final java.util.Iterator<java.util.Map.Entry<java.lang.String,java.lang.Object>> attrEntrySetIterator()

checkRep

public boolean checkRep()

Checks "representation invariant" (see MIT SE), and returns true iff object is valid, which should be always.