com.google.appengine.api.prospectivesearch.dev
Class QueryEvaluator

java.lang.Object
  com.google.appengine.api.prospectivesearch.dev.QueryEvaluator

All Implemented Interfaces:

com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

public class QueryEvaluator
extends java.lang.Object
implements com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

The QueryEvaluator class performs a full visit of the query tree, dispatching leaf evaluations to the QueryEngine. Fine-grained debugging of query parsing is available at the logging level java.util.logging.Level.FINEST. Not multi-thread safe.

Method Summary

void	visitConjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a conjunction (logical and) of conditions.
void	visitContains(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents that a field must contain a value.
void	visitDisjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a disjunction (logical or) of conditions.
void	visitEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents that a field value must be greater than or equal to some specified value.
void	visitFuzzy(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a text field that is subject to query rewrite.
void	visitGreaterOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents an inequality between a field and value.
void	visitGreaterThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents that a field value must be greater than some specified value.
void	visitLessOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents that a field value must be less than or equal to some specified value.
void	visitLessThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents that a field value must be less than some specified value.
void	visitLiteral(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a text field that must not be altered.
void	visitNegation(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a negation of conditions.
void	visitOther(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Catch-all method for future type of query nodes.
void	visitRestriction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a condition restricted to a named field.
void	visitValue(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker, Tree node, java.util.concurrent.atomic.AtomicBoolean matches) Visits a node that represents a constant value.

Methods inherited from class java.lang.Object

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

Method Detail

visitConjunction

public void visitConjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a conjunction (logical and) of conditions.

Specified by:

visitConjunction in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

Parameters:

matches - Is set to the conjunction of node's sub-expressions.

visitDisjunction

public void visitDisjunction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a disjunction (logical or) of conditions.

Specified by:

visitDisjunction in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

Parameters:

matches - Is set to the disjunction of node's sub-expressions.

visitNegation

public void visitNegation(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                          Tree node,
                          java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a negation of conditions.

Specified by:

visitNegation in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

Parameters:

matches - Is set to the negation of node's sub-expression.

visitRestriction

public void visitRestriction(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a condition restricted to a named field.

Specified by:

visitRestriction in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

Parameters:

matches - Is set to the value of node's sub-expression.

visitFuzzy

public void visitFuzzy(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                       Tree node,
                       java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a text field that is subject to query rewrite.

Specified by:

visitFuzzy in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitLiteral

public void visitLiteral(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                         Tree node,
                         java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a text field that must not be altered.

Specified by:

visitLiteral in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitLessThan

public void visitLessThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                          Tree node,
                          java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents that a field value must be less than some specified value.

Specified by:

visitLessThan in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitLessOrEqual

public void visitLessOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents that a field value must be less than or equal to some specified value.

Specified by:

visitLessOrEqual in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitGreaterThan

public void visitGreaterThan(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                             Tree node,
                             java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents that a field value must be greater than some specified value.

Specified by:

visitGreaterThan in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitGreaterOrEqual

public void visitGreaterOrEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                                Tree node,
                                java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents an inequality between a field and value.

Specified by:

visitGreaterOrEqual in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitEqual

public void visitEqual(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                       Tree node,
                       java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents that a field value must be greater than or equal to some specified value.

Specified by:

visitEqual in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitContains

public void visitContains(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                          Tree node,
                          java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents that a field must contain a value.

Specified by:

visitContains in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitValue

public void visitValue(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                       Tree node,
                       java.util.concurrent.atomic.AtomicBoolean matches)

Visits a node that represents a constant value.

Specified by:

visitValue in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>

visitOther

public void visitOther(com.google.appengine.api.search.query.QueryTreeWalker<java.util.concurrent.atomic.AtomicBoolean> walker,
                       Tree node,
                       java.util.concurrent.atomic.AtomicBoolean matches)

Catch-all method for future type of query nodes.

Specified by:

visitOther in interface com.google.appengine.api.search.query.QueryTreeVisitor<java.util.concurrent.atomic.AtomicBoolean>