Package org.apache.vxquery.compiler.rewriter.rules

Class ReplaceSourceMapInDocExpression

java.lang.Object

org.apache.vxquery.compiler.rewriter.rules.ReplaceSourceMapInDocExpression

All Implemented Interfaces:

org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule

public class ReplaceSourceMapInDocExpression
extends Object
implements org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule

The rule searches for where the function_doc1 function is in the plan in place of XQuery function. It replaces the string contained in the function with its absolute file path.

 Before
 
   plan__parent
   %OPERATOR( $v1 : fn:doc( \@string ) )
   plan__child
   
   Where xquery_function creates an atomic value.
   
 After 
 
   plan__parent
   %OPERATOR( $v1 : fn:doc( \@absolute_file_path ) ) )
   plan__child
 

Author:

shivanim

Constructor Summary

Constructors

Constructor	Description
ReplaceSourceMapInDocExpression()

Method Summary

Modifier and Type	Method	Description
boolean	rewritePost(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef, org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)
boolean	rewritePre(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef, org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)
protected boolean	updateDocExpression(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef, org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression> funcExpression, org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplaceSourceMapInDocExpression

public ReplaceSourceMapInDocExpression()

Method Detail

rewritePre

public boolean rewritePre(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef,
                          org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)
                   throws org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

Specified by:

rewritePre in interface org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule

Throws:

org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

rewritePost

public boolean rewritePost(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef,
                           org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)
                    throws org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

Specified by:

rewritePost in interface org.apache.hyracks.algebricks.core.rewriter.base.IAlgebraicRewriteRule

Throws:

org.apache.hyracks.algebricks.common.exceptions.AlgebricksException

updateDocExpression

protected boolean updateDocExpression(org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalOperator> opRef,
                                      org.apache.commons.lang3.mutable.Mutable<org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression> funcExpression,
                                      org.apache.hyracks.algebricks.core.algebra.base.IOptimizationContext context)