Package org.pentaho.di.core

Class Condition

java.lang.Object
org.pentaho.di.core.Condition
All Implemented Interfaces:
Cloneable, XMLInterface
public class Condition extends Object implements Cloneable, XMLInterface
This class describes a condition in a general meaning. A condition can either be

1) Atomic (a=10, B='aa')

2) Composite ( NOT Condition1 AND Condition2 OR Condition3 )

If the nr of atomic conditions is 0, the condition is atomic, otherwise it's Composit.

Precedence doesn't exist. Conditions are evaluated in the order in which they are found.

A condition can be negated or not.

Since:
8-06-2004
Author:
Matt

  • Field Details

  • Constructor Details

  • Method Details

    • getObjectId

      public ObjectId getObjectId()
      Returns the database ID of this Condition if a repository was used before.
      Returns:
      the ID of the db connection.

    • setObjectId

      public void setObjectId(ObjectId id)
      Set the database ID for this Condition in the repository.
      Parameters:
      id - The ID to set on this condition.

    • clone

      public Object clone()
      Overrides:
      clone in class Object

    • setOperator

      public void setOperator(int operator)

    • getOperator

      public int getOperator()

    • getOperatorDesc

      public String getOperatorDesc()

    • getOperator

      public static final int getOperator(String description)

    • getOperators

      public static final String[] getOperators()

    • getRealOperators

      public static final String[] getRealOperators()

    • setLeftValuename

      public void setLeftValuename(String leftValuename)

    • getLeftValuename

      public String getLeftValuename()

    • getFunction

      public int getFunction()

    • setFunction

      public void setFunction(int function)

    • getFunctionDesc

      public String getFunctionDesc()

    • getFunction

      public static final int getFunction(String description)

    • setRightValuename

      public void setRightValuename(String rightValuename)

    • getRightValuename

      public String getRightValuename()

    • setRightExact

      public void setRightExact(ValueMetaAndData rightExact)

    • getRightExact

      public ValueMetaAndData getRightExact()

    • getRightExactString

      public String getRightExactString()

    • getRightExactID

      public ObjectId getRightExactID()
      Get the id of the RightExact Value in the repository
      Returns:
      The id of the RightExact Value in the repository

    • setRightExactID

      public void setRightExactID(ObjectId idRightExact)
      Set the database ID for the RightExact Value in the repository.
      Parameters:
      idRightExact - The ID to set on this Value.

    • isAtomic

      public boolean isAtomic()

    • isComposite

      public boolean isComposite()

    • isNegated

      public boolean isNegated()

    • setNegated

      public void setNegated(boolean negate)

    • negate

      public void negate()

    • isEmpty

      public boolean isEmpty()
      A condition is empty when the condition is atomic and no left field is specified.

    • clearFieldPositions

      public void clearFieldPositions()
      We cache the position of a value in a row. If ever we want to change the rowtype, we need to clear these cached field positions...

    • evaluate

      public boolean evaluate(RowMetaInterface rowMeta, Object[] r)
      Evaluate the condition...
      Parameters:
      rowMeta - the row metadata
      r - the row data
      Returns:
      true if the condition evaluates to true.

    • addCondition

      public void addCondition(Condition cb)

    • addCondition

      public void addCondition(int idx, Condition cb)

    • removeCondition

      public void removeCondition(int nr)

    • simplify

      public boolean simplify()
      This method moves up atomic conditions if there is only one sub-condition.
      Returns:
      true if there was a simplification.

    • nrConditions

      public int nrConditions()

    • getCondition

      public Condition getCondition(int i)

    • setCondition

      public void setCondition(int i, Condition subCondition)

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • toString

      public String toString(int level, boolean showNegate, boolean showOperator)

    • getXML

      public String getXML() throws KettleValueException
      Description copied from interface: XMLInterface
      Describes the Object implementing this interface as XML
      Specified by:
      getXML in interface XMLInterface
      Returns:
      the XML string for this object
      Throws:
      KettleValueException

    • getXML

      public String getXML(int level) throws KettleValueException
      Throws:
      KettleValueException

    • getUsedFields

      public String[] getUsedFields()

    • getUsedFields

      public void getUsedFields(Map<String,String> fields)

    • getChildren

      public List<Condition> getChildren()