org.apache.lucene.queryparser.flexible.core.nodes

Class PathQueryNode

java.lang.Object

org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl

org.apache.lucene.queryparser.flexible.core.nodes.PathQueryNode

All Implemented Interfaces:

Cloneable, QueryNode

public class PathQueryNode
extends QueryNodeImpl

A PathQueryNode is used to store queries like /company/USA/California /product/shoes/brown. QueryText are objects that contain the text, begin position and end position in the query.

Example how the text parser creates these objects:

 List values = ArrayList(); 
 values.add(new PathQueryNode.QueryText("company", 1, 7)); 
 values.add(new PathQueryNode.QueryText("USA", 9, 12)); 
 values.add(new PathQueryNode.QueryText("California", 14, 23)); 
 QueryNode q = new PathQueryNode(values);
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PathQueryNode.QueryText Term text with a beginning and end position

Field Summary

Fields inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl

PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields

Constructor Summary

Constructors

Constructor and Description
PathQueryNode(List<PathQueryNode.QueryText> pathElements)

Method Summary

Methods

Modifier and Type	Method and Description
QueryNode	cloneTree() Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
CharSequence	getFirstPathElement() Returns the CharSequence value of a specific QueryText element
PathQueryNode.QueryText	getPathElement(int index) Returns the a specific QueryText element
List<PathQueryNode.QueryText>	getPathElements() Returns the a List with all QueryText elements
List<PathQueryNode.QueryText>	getPathElements(int startIndex) Returns a List QueryText element from position startIndex
void	setPathElements(List<PathQueryNode.QueryText> elements) Returns the a List with all QueryText elements
CharSequence	toQueryString(EscapeQuerySyntax escaper) convert to a query string understood by the query parser
String	toString() Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>

Methods inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl

add, add, allocate, clone, containsTag, getChildren, getParent, getTag, getTagMap, isDefaultField, isLeaf, isRoot, removeFromParent, set, setLeaf, setTag, unsetTag

Methods inherited from class java.lang.Object

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

Constructor Detail

PathQueryNode

public PathQueryNode(List<PathQueryNode.QueryText> pathElements)

Parameters:

pathElements - - List of QueryText objects

Method Detail

getPathElements

public List<PathQueryNode.QueryText> getPathElements()

Returns the a List with all QueryText elements

Returns:

QueryText List size

setPathElements

public void setPathElements(List<PathQueryNode.QueryText> elements)

Returns the a List with all QueryText elements

getPathElement

public PathQueryNode.QueryText getPathElement(int index)

Returns the a specific QueryText element

Returns:

QueryText List size

getFirstPathElement

public CharSequence getFirstPathElement()

Returns the CharSequence value of a specific QueryText element

Returns:

the CharSequence for a specific QueryText element

getPathElements

public List<PathQueryNode.QueryText> getPathElements(int startIndex)

Returns a List QueryText element from position startIndex

Returns:

a List QueryText element from position startIndex

toQueryString

public CharSequence toQueryString(EscapeQuerySyntax escaper)

Description copied from interface: QueryNode

convert to a query string understood by the query parser

toString

public String toString()

Description copied from class: QueryNodeImpl

Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>

Specified by:

toString in interface QueryNode

Overrides:

toString in class QueryNodeImpl

See Also:

QueryNode.toString()

cloneTree

public QueryNode cloneTree()
                    throws CloneNotSupportedException

Description copied from interface: QueryNode

Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method

Specified by:

cloneTree in interface QueryNode

Overrides:

cloneTree in class QueryNodeImpl

Returns:

the cloned tree

Throws:

CloneNotSupportedException