org.basex.data

Class ExprInfo

java.lang.Object

org.basex.data.ExprInfo

Direct Known Subclasses:

Expr, FTOpt, Pragma, UserFuncs, VarContext, VarStack

public abstract class ExprInfo
extends java.lang.Object

Expression information, used for debugging and logging.

Author:

BaseX Team 2005-12, BSD License, Christian Gruen

Constructor Summary

Constructors

Constructor and Description
ExprInfo()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addPlan(FElem plan, FElem el, ExprInfo... expr) Adds trees of the specified expressions to the root node.
protected void	addPlan(FElem plan, FElem el, java.lang.Object... expr) Adds trees of the specified expressions to the root node.
java.lang.String	description() Returns a string description of the expression.
byte[]	info() Returns the simplified class name.
abstract void	plan(FElem e) Creates an expression tree.
protected FAttr	planAttr(java.lang.Object n, java.lang.Object v) Creates a new attribute to be added to the expression tree.
protected FElem	planElem(java.lang.Object... atts) Creates a new element node to be added to the expression tree.
abstract java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExprInfo

public ExprInfo()

Method Detail

description

public java.lang.String description()

Returns a string description of the expression. This method is only called by error messages. Contrary to the toString() method, arguments are not included in the output.

Returns:

result of check

info

public byte[] info()

Returns the simplified class name.

Returns:

class name

toString

public abstract java.lang.String toString()

Overrides:

toString in class java.lang.Object

plan

public abstract void plan(FElem e)

Creates an expression tree.

Parameters:

e - root element

planElem

protected FElem planElem(java.lang.Object... atts)

Creates a new element node to be added to the expression tree.

Parameters:

atts - optional attribute names and values

Returns:

tree node

addPlan

protected void addPlan(FElem plan,
           FElem el,
           java.lang.Object... expr)

Adds trees of the specified expressions to the root node.

Parameters:

plan - root node

el - new element

expr - expressions

addPlan

protected void addPlan(FElem plan,
           FElem el,
           ExprInfo... expr)

Adds trees of the specified expressions to the root node.

Parameters:

plan - root node

el - new element

expr - expressions

planAttr

protected FAttr planAttr(java.lang.Object n,
             java.lang.Object v)

Creates a new attribute to be added to the expression tree.

Parameters:

n - name of attribute

v - value of attribute

Returns:

tree node