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

Class FieldQueryNode

java.lang.Object

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

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

All Implemented Interfaces:

Cloneable, FieldableNode, FieldValuePairQueryNode<CharSequence>, QueryNode, TextableQueryNode, ValueQueryNode<CharSequence>

Direct Known Subclasses:

FuzzyQueryNode, QuotedFieldQueryNode, WildcardQueryNode

public class FieldQueryNode
extends QueryNodeImpl
implements FieldValuePairQueryNode<CharSequence>, TextableQueryNode

A FieldQueryNode represents a element that contains field/text tuple

Field Summary

Fields

Modifier and Type	Field	Description
protected int	begin	The term's begin position.
protected int	end	The term's end position.
protected CharSequence	field	The term's field
protected int	positionIncrement	The term's position increment.
protected CharSequence	text	The term's text.

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

PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields

Constructor Summary

Constructors

Constructor	Description
FieldQueryNode(CharSequence field, CharSequence text, int begin, int end)

Method Summary

Modifier and Type	Method	Description
FieldQueryNode	cloneTree()	Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
int	getBegin()
int	getEnd()
CharSequence	getField()	Returns the field associated to the node and every node under it.
String	getFieldAsString()	returns null if the field was not specified in the query string
int	getPositionIncrement()
protected CharSequence	getTermEscaped(EscapeQuerySyntax escaper)
protected CharSequence	getTermEscapeQuoted(EscapeQuerySyntax escaper)
CharSequence	getText()	Returns the term.
String	getTextAsString()
CharSequence	getValue()
void	setBegin(int begin)
void	setEnd(int end)
void	setField(CharSequence field)	Associates the node to a field.
void	setPositionIncrement(int pi)
void	setText(CharSequence text)
void	setValue(CharSequence value)
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:

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.queryparser.flexible.core.nodes.QueryNode

add, add, containsTag, getChildren, getParent, getTag, getTagMap, isLeaf, removeChildren, removeFromParent, set, setTag, unsetTag

Field Details

field

protected CharSequence field

The term's field

text

protected CharSequence text

The term's text.

begin

protected int begin

The term's begin position.

end

protected int end

The term's end position.

positionIncrement

protected int positionIncrement

The term's position increment.

Constructor Details

FieldQueryNode

public FieldQueryNode(CharSequence field,
 CharSequence text,
 int begin,
 int end)

Parameters:

field - - field name

text - - value

begin - - position in the query string

end - - position in the query string

Method Details

getTermEscaped

protected CharSequence getTermEscaped(EscapeQuerySyntax escaper)

getTermEscapeQuoted

protected CharSequence getTermEscapeQuoted(EscapeQuerySyntax escaper)

toQueryString

public CharSequence toQueryString(EscapeQuerySyntax escaper)

Description copied from interface: QueryNode

convert to a query string understood by the query parser

Specified by:

toQueryString in interface QueryNode

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()

getTextAsString

public String getTextAsString()

Returns:

the term

getFieldAsString

public String getFieldAsString()

returns null if the field was not specified in the query string

Returns:

the field

getBegin

public int getBegin()

setBegin

public void setBegin(int begin)

getEnd

public int getEnd()

setEnd

public void setEnd(int end)

getField

public CharSequence getField()

Description copied from interface: FieldableNode

Returns the field associated to the node and every node under it.

Specified by:

getField in interface FieldableNode

Returns:

the field name

setField

public void setField(CharSequence field)

Description copied from interface: FieldableNode

Associates the node to a field.

Specified by:

setField in interface FieldableNode

Parameters:

field - the field name

getPositionIncrement

public int getPositionIncrement()

setPositionIncrement

public void setPositionIncrement(int pi)

getText

public CharSequence getText()

Returns the term.

Specified by:

getText in interface TextableQueryNode

Returns:

The "original" form of the term.

setText

public void setText(CharSequence text)

Specified by:

setText in interface TextableQueryNode

Parameters:

text - the text to set

cloneTree

public FieldQueryNode 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

getValue

public CharSequence getValue()

Specified by:

getValue in interface ValueQueryNode<CharSequence>

setValue

public void setValue(CharSequence value)

Specified by:

setValue in interface ValueQueryNode<CharSequence>