Package weka.core.packageManagement

Class PackageConstraint

java.lang.Object
weka.core.packageManagement.PackageConstraint
Direct Known Subclasses:
VersionPackageConstraint, VersionRangePackageConstraint
public abstract class PackageConstraint extends Object
Abstract base class for package constraints. An example implementation might be to encapsulate a constraint with respect to a version number. Checking against a target in this case would typically assume the same package for both this and the target.
Version:
$Revision: 44030 $
Author:
Mark Hall (mhall{[at]}pentaho{[dot]}com)

  • Constructor Details

    • PackageConstraint

      public PackageConstraint()

  • Method Details

    • setPackage

      public void setPackage(Package p)
      Set the package that this constraint applies to.
      Parameters:
      p - the package that this constraint applies to.

    • getPackage

      public Package getPackage()
      Get the package that this constraint applies to.
      Returns:
      the Package that this constraint applies to.

    • checkConstraint

      public abstract boolean checkConstraint(Package target) throws Exception
      Check the target package against the constraint embodied in this PackageConstraint.
      Parameters:
      target - a package to check with respect to the encapsulated package and the constraint.
      Returns:
      true if the constraint is met by the target package with respect to the encapsulated package + constraint.
      Throws:
      Exception - if the constraint can't be checked for some reason.

    • checkConstraint

      public abstract PackageConstraint checkConstraint(PackageConstraint target) throws Exception
      Check the target package constraint against the constraint embodied in this package constraint. Returns either the package constraint that covers both this and the target constraint, or null if this and the target are incompatible.
      Parameters:
      target - the package constraint to compare against
      Returns:
      a package constraint that covers this and the supplied constraint, or null if they are incompatible.
      Throws:
      Exception