it.unimi.di.mg4j.query.nodes
Class AbstractQueryBuilderVisitor<T>

java.lang.Object
  it.unimi.di.mg4j.query.nodes.AbstractQueryBuilderVisitor<T>

All Implemented Interfaces:

QueryBuilderVisitor<T>, FlyweightPrototype<QueryBuilderVisitor<T>>

Direct Known Subclasses:

AbstractTermExpander.ExpanderVisitor, DocumentIteratorBuilderVisitor

public abstract class AbstractQueryBuilderVisitor<T>
extends Object
implements QueryBuilderVisitor<T>

A QueryBuilderVisitor that returns true on all visitPre() methods and does nothing on prepare().

Author:

Sebastiano Vigna

Constructor Summary

AbstractQueryBuilderVisitor()

Method Summary

QueryBuilderVisitor<T>	prepare() No-op.
boolean	visitPre(Align node) Visits an Align node before recursing into the corresponding subtree.
boolean	visitPre(And node) Visits an And node before recursing into the corresponding subtree.
boolean	visitPre(Consecutive node) Visits a Consecutive node before recursing into the corresponding subtree.
boolean	visitPre(Difference node) Visits an Difference node before recursing into the corresponding subtree.
boolean	visitPre(LowPass node) Visits a LowPass node before recursing into the corresponding subtree.
boolean	visitPre(MultiTerm node) Visits a MultiTerm node before recursing into the corresponding subtree.
boolean	visitPre(Not node) Visits a Not node before recursing into the corresponding subtree.
boolean	visitPre(Or node) Visits an Or node before recursing into the corresponding subtree.
boolean	visitPre(OrderedAnd node) Visits an OrderedAnd node before recursing into the corresponding subtree.
boolean	visitPre(Remap node) Visits a Remap node before recursing into the corresponding subtree.
boolean	visitPre(Select node) Visits a Select node before recursing into the corresponding subtree.
boolean	visitPre(Weight node) Visits a Weight node before recursing into the corresponding subtree.

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.di.mg4j.query.nodes.QueryBuilderVisitor

copy, newArray, visit, visit, visit, visit, visit, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost, visitPost

Constructor Detail

AbstractQueryBuilderVisitor

public AbstractQueryBuilderVisitor()

Method Detail

prepare

public QueryBuilderVisitor<T> prepare()

No-op.

Specified by:

prepare in interface QueryBuilderVisitor<T>

Returns:

this visitor.

visitPre

public boolean visitPre(And node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits an And node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Consecutive node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a Consecutive node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(LowPass node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a LowPass node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Not node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a Not node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Or node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits an Or node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(OrderedAnd node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits an OrderedAnd node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Align node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits an Align node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(MultiTerm node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a MultiTerm node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Select node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a Select node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Remap node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a Remap node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Weight node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits a Weight node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException

visitPre

public boolean visitPre(Difference node)
                 throws QueryBuilderVisitorException

Description copied from interface: QueryBuilderVisitor

Visits an Difference node before recursing into the corresponding subtree.

Specified by:

visitPre in interface QueryBuilderVisitor<T>

Parameters:

node - the node to be visited.

Returns:

true if the visit should continue.

Throws:

QueryBuilderVisitorException