org.aksw.sparqlify.algebra.sql.nodes

Class SqlOpBase

java.lang.Object

org.aksw.sparqlify.algebra.sql.nodes.SqlOpBase

All Implemented Interfaces:

SqlOp

Direct Known Subclasses:

SqlOpBase0, SqlOpBase1, SqlOpBase2, SqlOpBaseN

public abstract class SqlOpBase
extends Object
implements SqlOp

Field Summary

Fields

Modifier and Type	Field and Description
protected Schema	schema

Constructor Summary

Constructors

Constructor and Description
SqlOpBase(Schema schema)

Method Summary

Methods

Modifier and Type	Method and Description
SqlOp	copy(Schema schema, List<SqlOp> newOps) Create a copy of the SqlOp with a projected schema.
Schema	getSchema()
abstract boolean	isEmpty()
String	toString()
void	write(org.apache.jena.atlas.io.IndentedWriter writer)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.sparqlify.algebra.sql.nodes.SqlOp

getSubOps

Field Detail

schema

protected Schema schema

Constructor Detail

SqlOpBase

public SqlOpBase(Schema schema)

Method Detail

getSchema

public Schema getSchema()

Specified by:

getSchema in interface SqlOp

isEmpty

public abstract boolean isEmpty()

Specified by:

isEmpty in interface SqlOp

write

public void write(org.apache.jena.atlas.io.IndentedWriter writer)

Specified by:

write in interface SqlOp

toString

public String toString()

Overrides:

toString in class Object

copy

public SqlOp copy(Schema schema,
         List<SqlOp> newOps)

Description copied from interface: SqlOp

Create a copy of the SqlOp with a projected schema. The new schema will only hold information of the selected columns. Used to filter an Op to only the referenced columns. This is different from a projection!

Specified by:

copy in interface SqlOp