Class TriggerInfo

java.lang.Object
org.apache.derby.impl.sql.execute.TriggerInfo
All Implemented Interfaces:
Externalizable, Serializable, Formatable, TypedFormat
public final class TriggerInfo extends Object implements Formatable
This is a simple class used to store the run time information about a foreign key. Used by DML to figure out what to check.
See Also:

  • Field Details

    • triggerArray

      TriggerDescriptor[] triggerArray
      This class implements Formatable. That means that it can write itself to and from a formatted stream. If you add more fields to this class, make sure that you also write/read them with the writeExternal()/readExternal() methods. If, inbetween releases, you add more fields to this class, then you should bump the version number emitted by the getTypeFormatId() method. OR, since this is something that is used in stored prepared statements, it is ok to change it if you make sure that stored prepared statements are invalidated across releases.

  • Constructor Details

    • TriggerInfo

      public TriggerInfo()
      Niladic constructor for Formattable

    • TriggerInfo

      public TriggerInfo(TriggerDescriptorList triggers)
      Constructor for TriggerInfo
      Parameters:
      triggers - the list of trigger descriptors

  • Method Details

    • hasTrigger

      boolean hasTrigger(boolean isBefore, boolean isRow)
      Do we have a trigger or triggers that meet the criteria
      Parameters:
      isBefore - true for a before trigger, false for after trigger, null for either
      isRow - true for a row trigger, false for statement trigger, null for either
      Returns:
      true if we have a trigger that meets the criteria

    • getTriggerArray

      TriggerDescriptor[] getTriggerArray()

    • writeExternal

      public void writeExternal(ObjectOutput out) throws IOException
      Write this object out
      Specified by:
      writeExternal in interface Externalizable
      Parameters:
      out - write bytes here
      Throws:
      IOException - thrown on error

    • readExternal

      public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
      Read this object from a stream of stored objects.
      Specified by:
      readExternal in interface Externalizable
      Parameters:
      in - read this.
      Throws:
      IOException - thrown on error
      ClassNotFoundException - thrown on error

    • getTypeFormatId

      public int getTypeFormatId()
      Get the formatID which corresponds to this class.
      Specified by:
      getTypeFormatId in interface TypedFormat
      Returns:
      the formatID of this class

    • toString

      public String toString()
      ///////////////////////////////////////////////////////////
      Overrides:
      toString in class Object