sparql.convert

Class RgExpression

java.lang.Object

sparql.convert.RgExpression

public class RgExpression
extends java.lang.Object

Represents the regular expression in path queries.

Constructor Summary

Constructors

Constructor and Description
RgExpression(java.util.List<java.lang.String> stringPattern) Constructor to initiate the patterns i.e ( '(', ')', '+', '*').
RgExpression(java.util.List<java.lang.String> stringPattern, java.sql.Connection conn) Constructor to initiate the patterns i.e ( '(', ')', '+', '*') and open connection to keep the temporary view of start and end nodes.

Method Summary

Methods

Modifier and Type	Method and Description
void	addPattern(java.lang.String name, java.lang.String values) Add pattern and its value to list.
boolean	check(java.util.List<java.lang.String> path) Match the path with regular expression.
boolean	checkExistence(java.lang.String parent, java.lang.String child)
java.util.Map<java.lang.String,java.lang.String>	getPattern() Get each pattern and its possible values i.e (edge -> e1, e2, e3,...)
void	removeLastPattern()

Methods inherited from class java.lang.Object

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

Constructor Detail

RgExpression

public RgExpression(java.util.List<java.lang.String> stringPattern)

Constructor to initiate the patterns i.e ( '(', ')', '+', '*').

Parameters:

stringPattern - Patterns separated by space.

RgExpression

public RgExpression(java.util.List<java.lang.String> stringPattern,
            java.sql.Connection conn)

Constructor to initiate the patterns i.e ( '(', ')', '+', '*') and open connection to keep the temporary view of start and end nodes.

Parameters:

stringPattern - Patterns separated by space.

conn - open connection to keep the temporary view.

Method Detail

getPattern

public java.util.Map<java.lang.String,java.lang.String> getPattern()

Get each pattern and its possible values i.e (edge -> e1, e2, e3,...)

Returns:

Map Key->patterns i.e ('(', ')', '+', '*', Edge, Node). Value i.e ('e1', 'n1'). For operators like '(' an '*' the value = null.

addPattern

public void addPattern(java.lang.String name,
              java.lang.String values)

Add pattern and its value to list.

Parameters:

name - Pattern

values - Value

removeLastPattern

public void removeLastPattern()

check

public boolean check(java.util.List<java.lang.String> path)

Match the path with regular expression.

Parameters:

path - Path node

Returns:

True if the path node is match with regular expression.

checkExistence

public boolean checkExistence(java.lang.String parent,
                     java.lang.String child)