Class BoostQueryNode
java.lang.Object
org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
org.apache.lucene.queryparser.flexible.core.nodes.BoostQueryNode
A
BoostQueryNode boosts the QueryNode tree which is under this node. So, it must only and
always have one child.
The boost value may vary from 0.0 to 1.0.
-
Field Summary
Fields inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionRecursive clone the QueryNode tree.getChild()floatgetValue()Returns the boost value.toQueryString(EscapeQuerySyntax escapeSyntaxParser) convert to a query string understood by the query parsertoString()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
-
Constructor Details
-
BoostQueryNode
Constructs a boost node- Parameters:
query- the query to be boostedvalue- the boost value, it may vary from 0.0 to 1.0
-
-
Method Details
-
getChild
- Returns:
- the single child which this node boosts
-
getValue
public float getValue()Returns the boost value. It may vary from 0.0 to 1.0.- Returns:
- the boost value
-
toString
Description copied from class:QueryNodeImplEvery implementation of this class should return pseudo xml like this:For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>
- Specified by:
toStringin interfaceQueryNode- Overrides:
toStringin classQueryNodeImpl- See Also:
-
toQueryString
Description copied from interface:QueryNodeconvert to a query string understood by the query parser -
cloneTree
Description copied from interface:QueryNodeRecursive clone the QueryNode tree. The tags are not copied to the new tree when you call the cloneTree() method.- Specified by:
cloneTreein interfaceQueryNode- Overrides:
cloneTreein classQueryNodeImpl- Returns:
- the cloned tree
- Throws:
CloneNotSupportedException
-