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.
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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 The tags are not copied to the new tree when you call the cloneTree() methodgetChild()Returns the single child which this node boosts.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
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Constructor Details
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BoostQueryNode
Constructs a boost node- Parameters:
query- the query to be boostedvalue- the boost value, it may vary from 0.0 to 1.0
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Method Details
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getChild
Returns the single child which this node boosts.- Returns:
- the single child which this node boosts
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getValue
public float getValue()Returns the boost value. It may vary from 0.0 to 1.0.- Returns:
- the boost value
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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:
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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
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