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

Class QueryNodeImpl

java.lang.Object

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

All Implemented Interfaces:

Cloneable, QueryNode

Direct Known Subclasses:

AbstractRangeQueryNode, BooleanQueryNode, BoostQueryNode, DeletedQueryNode, FieldQueryNode, GroupQueryNode, MatchAllDocsQueryNode, ModifierQueryNode, MultiPhraseQueryNode, OpaqueQueryNode, PathQueryNode, PhraseSlopQueryNode, PointQueryNode, RegexpQueryNode, SlopQueryNode, TokenizedPhraseQueryNode

public abstract class QueryNodeImpl
extends Object
implements QueryNode, Cloneable

A QueryNodeImpl is the default implementation of the interface QueryNode

Field Summary

Fields

Modifier and Type	Field	Description
static String	PLAINTEXT_FIELD_NAME
protected boolean	toQueryStringIgnoreFields	If set to true the the method toQueryString will not write field names

Constructor Summary

Constructors

Constructor	Description
QueryNodeImpl()

Method Summary

Modifier and Type	Method	Description
void	add(List<QueryNode> children)
void	add(QueryNode child)
protected void	allocate()
QueryNode	clone()
QueryNode	cloneTree()	Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
boolean	containsTag(String tagName)	verify if a node contains a tag
List<QueryNode>	getChildren()	get Children nodes
QueryNode	getParent()
Object	getTag(String tagName)	Returns object stored under that tag name
Map<String,Object>	getTagMap()	Returns a map containing all tags attached to this query node.
protected boolean	isDefaultField(CharSequence fld)	This method is use toQueryString to detect if fld is the default field
boolean	isLeaf()	verify if a node is a Leaf node
protected boolean	isRoot()
void	removeChildren(QueryNode childNode)	Remove a child node
void	removeFromParent()	Removes this query node from its parent.
void	set(List<QueryNode> children)
protected void	setLeaf(boolean isLeaf)
void	setTag(String tagName, Object value)	Associate the specified value with the specified tagName.
String	toString()	Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>
void	unsetTag(String tagName)	Unset a tag.

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

toQueryString

Field Detail

PLAINTEXT_FIELD_NAME

public static final String PLAINTEXT_FIELD_NAME

See Also:

Constant Field Values

toQueryStringIgnoreFields

protected boolean toQueryStringIgnoreFields

If set to true the the method toQueryString will not write field names

Constructor Detail

QueryNodeImpl

public QueryNodeImpl()

Method Detail

allocate

protected void allocate()

add

public final void add(QueryNode child)

Specified by:

add in interface QueryNode

add

public final void add(List<QueryNode> children)

Specified by:

add in interface QueryNode

isLeaf

public boolean isLeaf()

Description copied from interface: QueryNode

verify if a node is a Leaf node

Specified by:

isLeaf in interface QueryNode

set

public final void set(List<QueryNode> children)

Specified by:

set in interface QueryNode

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

Returns:

the cloned tree

Throws:

CloneNotSupportedException

clone

public QueryNode clone()
                throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

setLeaf

protected void setLeaf(boolean isLeaf)

getChildren

public final List<QueryNode> getChildren()

Description copied from interface: QueryNode

get Children nodes

Specified by:

getChildren in interface QueryNode

Returns:

a List for QueryNode object. Returns null, for nodes that do not contain children. All leaf Nodes return null.

setTag

public void setTag(String tagName,
                   Object value)

Description copied from interface: QueryNode

Associate the specified value with the specified tagName. If the tagName already exists, the old value is replaced. The tagName and value cannot be null. tagName will be converted to lowercase.

Specified by:

setTag in interface QueryNode

unsetTag

public void unsetTag(String tagName)

Description copied from interface: QueryNode

Unset a tag. tagName will be converted to lowercase.

Specified by:

unsetTag in interface QueryNode

containsTag

public boolean containsTag(String tagName)

verify if a node contains a tag

Specified by:

containsTag in interface QueryNode

getTag

public Object getTag(String tagName)

Description copied from interface: QueryNode

Returns object stored under that tag name

Specified by:

getTag in interface QueryNode

getParent

public QueryNode getParent()

Specified by:

getParent in interface QueryNode

isRoot

protected boolean isRoot()

isDefaultField

protected boolean isDefaultField(CharSequence fld)

This method is use toQueryString to detect if fld is the default field

Parameters:

fld - - field name

Returns:

true if fld is the default field

toString

public String toString()

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 Object

See Also:

QueryNode.toString()

getTagMap

public Map<String,Object> getTagMap()

Returns a map containing all tags attached to this query node.

Specified by:

getTagMap in interface QueryNode

Returns:

a map containing all tags attached to this query node

removeChildren

public void removeChildren(QueryNode childNode)

Description copied from interface: QueryNode

Remove a child node

Specified by:

removeChildren in interface QueryNode

Parameters:

childNode - Which child to remove

removeFromParent

public void removeFromParent()

Description copied from interface: QueryNode

Removes this query node from its parent.

Specified by:

removeFromParent in interface QueryNode