asd

Class ASDGrammarNode

java.lang.Object

asd.ASDGrammarNode

public class ASDGrammarNode
extends java.lang.Object

Instances are nodes in an ASDGrammar

Author:

James A. Mason

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	hasIncoming
protected boolean	nodeBegins
protected java.util.ArrayList<java.lang.String>	nodeBeginsTypes
protected java.lang.String	nodeInstance
protected java.lang.String	nodePhraseType
protected java.lang.String	nodeSemanticAction
protected java.lang.String	nodeSemanticValue
protected java.util.ArrayList<ASDGrammarSuccessor>	nodeSuccessors
protected java.util.ArrayList<java.lang.String>	nodeSuccessorTypes
protected java.lang.String	nodeWord
protected short	xCoordinate
protected short	yCoordinate

Constructor Summary

Constructors

Constructor and Description
ASDGrammarNode(java.lang.String word, java.lang.String instance, boolean begins, java.util.ArrayList<java.lang.String> beginsTypes, java.util.ArrayList<ASDGrammarSuccessor> successors, java.util.ArrayList<java.lang.String> successorTypes, java.lang.String phraseType, java.lang.String semanticValue, java.lang.String semanticAction) Initializes a new ASDGrammarNode.

Method Summary

Modifier and Type	Method and Description
java.util.ArrayList<java.lang.String>	beginsTypes()
short	getXCoordinate()
short	getYCoordinate()
java.lang.String	instance()
boolean	isFinal()
boolean	isInitial()
java.lang.String	phraseType()
java.lang.String	semanticAction()
java.lang.String	semanticValue()
java.util.ArrayList<ASDGrammarSuccessor>	successors()
java.util.ArrayList<java.lang.String>	successorTypes()
java.lang.String	toString()
java.lang.String	toString(boolean optimize)
java.lang.String	word()

Methods inherited from class java.lang.Object

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

Field Detail

nodeWord

protected java.lang.String nodeWord

nodeInstance

protected java.lang.String nodeInstance

nodeBegins

protected boolean nodeBegins

nodeBeginsTypes

protected java.util.ArrayList<java.lang.String> nodeBeginsTypes

nodeSuccessors

protected java.util.ArrayList<ASDGrammarSuccessor> nodeSuccessors

nodeSuccessorTypes

protected java.util.ArrayList<java.lang.String> nodeSuccessorTypes

nodePhraseType

protected java.lang.String nodePhraseType

nodeSemanticValue

protected java.lang.String nodeSemanticValue

nodeSemanticAction

protected java.lang.String nodeSemanticAction

xCoordinate

protected short xCoordinate

yCoordinate

protected short yCoordinate

hasIncoming

protected boolean hasIncoming

Constructor Detail

ASDGrammarNode

public ASDGrammarNode(java.lang.String word,
                      java.lang.String instance,
                      boolean begins,
                      java.util.ArrayList<java.lang.String> beginsTypes,
                      java.util.ArrayList<ASDGrammarSuccessor> successors,
                      java.util.ArrayList<java.lang.String> successorTypes,
                      java.lang.String phraseType,
                      java.lang.String semanticValue,
                      java.lang.String semanticAction)

Initializes a new ASDGrammarNode. Pixel coordinates are set to 0, 0 by default.

Parameters:

word - the vocabulary element for which the node represents an instance

instance - the instance index of the node

begins - indicates whether or not the node can begin a phrase

beginsTypes - indicates what types of phrase (if any) can begin at the node; null indicates unspecified types

successors - lists pairs (word instance-index) of successors of the node in the grammar, if any; null indicates that the node is a final node

successorTypes - lists the phrase types in the successor nodes (if any); if successors is not null, null here indicates that there are successor phrase types with unspecified names

phraseType - names the phrase type that ends at the node, if the node is a final one

semanticValue - a String to be evaluated as the semantic value of the completed phrase, if the node is a final one; null indicates no semantic value to be computed

semanticAction - a String to be evaluated when the node is entered during a parse; null indicates no semantic action to be performed

Method Detail

beginsTypes

public java.util.ArrayList<java.lang.String> beginsTypes()

Returns:

a list of strings that name the phrase types that can begin, directly or indirectly, at the node (if it is an initial node); returns null if the node is not initial or if the phrase types that it can begin are not known specifically.

getXCoordinate

public short getXCoordinate()

Returns:

the horizontal pixel coordinate of the node.

getYCoordinate

public short getYCoordinate()

Returns:

the vertical pixel coordinate of the node.

instance

public java.lang.String instance()

Returns:

the String that indicates the instance of the word in the grammar that is represented by the node.

isFinal

public boolean isFinal()

Returns:

whether or not the node is a final one in the grammar -- that is, whether it ends a phrase.

isInitial

public boolean isInitial()

Returns:

whether or not the node is an initial one in the grammar -- that is, whether it can begin a phrase.

phraseType

public java.lang.String phraseType()

Returns:

a String that names the phrase type that ends at the node, if the node is a final node; returns null if the string is not a final node.

semanticAction

public java.lang.String semanticAction()

Returns:

the semantic action String for the node, or null if it has no semantic action to perform.

semanticValue

public java.lang.String semanticValue()

Returns:

the semantic value String for the node, or null if it has no semantic value to compute

successors

public java.util.ArrayList<ASDGrammarSuccessor> successors()

Returns:

a list of successor instances of the node, if it is not a final node in the grammar (each successor instance is represented by an ASDGrammarSuccessor instance); returns null if the node is a final node.

successorTypes

public java.util.ArrayList<java.lang.String> successorTypes()

Returns:

a list of Strings that name the phrase types that occur in successors of the node, if it is not a final node; returns null if the node has some unspecified phrase types in successors, or if the node is a final node.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

Returns:

a String that represents an ASDGrammarNode in character form optimized for parsing.

toString

public java.lang.String toString(boolean optimize)

Parameters:

optimize - indicates whether or not the node should be converted to a form that is optimized for parsing.

Returns:

a String that represents an ASDGrammarNode in character form, as used for the representation of a word instance in the character file representation of an ASD grammar.

word

public java.lang.String word()

Returns:

the word in the node