Class QueryModelTreePrinter

java.lang.Object

org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor<RuntimeException>

org.eclipse.rdf4j.query.algebra.helpers.QueryModelTreePrinter

All Implemented Interfaces:

QueryModelVisitor<RuntimeException>

public class QueryModelTreePrinter
extends AbstractQueryModelVisitor<RuntimeException>

QueryModelVisitor implementation that "prints" a tree representation of a query model. The tree representations is printed to an internal character buffer and can be retrieved using getTreeString(). As an alternative, the static utility method printTree(QueryModelNode) can be used.

Field Summary

Fields

Modifier and Type	Field	Description
private int	indentLevel
private final String	indentString
private static final String	LINE_SEPARATOR
private final StringBuilder	sb

Constructor Summary

Constructors

Constructor	Description
QueryModelTreePrinter()

Method Summary

Modifier and Type	Method	Description
private static void	appendCostAnnotation(QueryModelNode node, StringBuilder sb)
String	getTreeString()
protected void	meetNode(QueryModelNode node)	Method called by all of the other meet methods that are not overridden in subclasses.
static String	printTree(QueryModelNode node)
(package private) static String	toHumanReadableNumber(double number)
(package private) static String	toHumanReadableTime(long nanos)

Methods inherited from class AbstractQueryModelVisitor

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryTupleOperator, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetNAryValueOperator, meetOther, meetSubQueryValueOperator, meetUnaryTupleOperator, meetUnaryValueOperator, meetUpdateExpr

Methods inherited from class Object

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

Field Details

LINE_SEPARATOR

private static final String LINE_SEPARATOR

indentString

private final String indentString

See Also:

• Constant Field Values

sb

private final StringBuilder sb

indentLevel

private int indentLevel

Constructor Details

QueryModelTreePrinter

public QueryModelTreePrinter()

Method Details

printTree

public static String printTree(QueryModelNode node)

getTreeString

public String getTreeString()

meetNode

protected void meetNode(QueryModelNode node)

Description copied from class: AbstractQueryModelVisitor

Method called by all of the other meet methods that are not overridden in subclasses. This method can be overridden in subclasses to define default behaviour when visiting nodes. The default behaviour of this method is to visit the node's children.

Overrides:

meetNode in class AbstractQueryModelVisitor<RuntimeException>

Parameters:

node - The node that is being visited.

toHumanReadableNumber

static String toHumanReadableNumber(double number)

Returns:

Human readable number. Eg. 12.1M for 1212213.4 and UNKNOWN for -1.

toHumanReadableTime

static String toHumanReadableTime(long nanos)

Returns:

Human readable time.

appendCostAnnotation

private static void appendCostAnnotation(QueryModelNode node,
 StringBuilder sb)