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java.lang.Object org.terrier.querying.parser.Query
public abstract class Query
An abstract class that models a query, that consists of subqueries and query terms. The subqueries can be phrase queries, field queries, required queries, and combinations of those queries.
Nested Class Summary | |
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static interface |
Query.ForEachQueryNode
ForEachQueryNode interface |
Field Summary | |
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protected Query |
child
An encapsulated query. |
protected static SingleTermQuery[] |
tmpSTQ
An attribute used constructing arrays of the right type. |
Constructor Summary | |
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Query()
default constructor |
Method Summary | |
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void |
apply(Query.ForEachQueryNode processor)
Apply the specified processor to this node. |
boolean |
applyTermPipeline(TermPipelineAccessor tpa)
Applies a term pipeline in the query's terms, through the given term pipeline accessor. |
java.lang.Object |
clone()
Deep copy this Query object |
protected void |
getTerms(java.util.List<Query> alist)
Returns the terms of the query. |
abstract void |
getTermsOf(java.lang.Class<? extends Query> c,
java.util.List<Query> alist,
boolean req)
Returns all the query terms, in subqueries that are instances of a given class |
void |
obtainAllOf(java.lang.Class<? extends Query> c,
java.util.List<Query> a)
Returns all the queries of the specified class |
boolean |
obtainControls(java.util.Set<java.lang.String> allowed,
java.util.Map<java.lang.String,java.lang.String> controls)
Returns the specified control or false if that control does not exist |
void |
obtainQueryTerms(MatchingQueryTerms terms)
Stores the terms of the query in an structure used for matching documents to the query. |
void |
obtainQueryTerms(MatchingQueryTerms terms,
boolean required)
Stores the terms of the query in an structure used for matching documents to the query. |
abstract java.lang.String |
parseTree()
Returns the parse tree for the query as a string |
void |
setChild(Query q)
Sets the subquery object of this query. |
abstract java.lang.String |
toString()
Force anything concrete to provide toString method |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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protected Query child
protected static final SingleTermQuery[] tmpSTQ
Constructor Detail |
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public Query()
Method Detail |
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public java.lang.Object clone()
clone
in class java.lang.Object
public abstract java.lang.String toString()
toString
in class java.lang.Object
public abstract java.lang.String parseTree()
public abstract void getTermsOf(java.lang.Class<? extends Query> c, java.util.List<Query> alist, boolean req)
c
- Class a class of queries.alist
- ArrayList the list of query terms.req
- boolean indicates whether it the
subqueries are required or not.public void setChild(Query q)
q
- Query the subquery object.public boolean applyTermPipeline(TermPipelineAccessor tpa)
tpa
- TermPipelineAccessor the object that provides
access to the term pipeline.
public boolean obtainControls(java.util.Set<java.lang.String> allowed, java.util.Map<java.lang.String,java.lang.String> controls)
public void obtainQueryTerms(MatchingQueryTerms terms)
terms
- MatchingQueryTerms the structure that is used for
modelling a query for matching.public void obtainQueryTerms(MatchingQueryTerms terms, boolean required)
terms
- MatchingQueryTerms the structure that is used for
modelling a query for matching.required
- boolean specifies whether the subqueries are
required or not.protected void getTerms(java.util.List<Query> alist)
alist
- A structure that contains the query terms.public void apply(Query.ForEachQueryNode processor)
processor
- public void obtainAllOf(java.lang.Class<? extends Query> c, java.util.List<Query> a)
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