Package org.faktorips.codegen.dthelpers

Class DateHelper

java.lang.Object
org.faktorips.codegen.dthelpers.AbstractDatatypeHelper
org.faktorips.codegen.dthelpers.DateHelper
All Implemented Interfaces:
BaseDatatypeHelper<JavaCodeFragment>, DatatypeHelper
public class DateHelper extends AbstractDatatypeHelper
DatatypeHelper for DateDatatype.
Author:
Peter Erzberger

  • Constructor Details

    • DateHelper

      public DateHelper()
      Constructs a new helper.

    • DateHelper

      public DateHelper(DateDatatype datatype)

  • Method Details

    • getJavaClassName

      public String getJavaClassName()
      Description copied from interface: DatatypeHelper
      Returns the qualified Java class name the datatype represents.

    • getToStringExpression

      public JavaCodeFragment getToStringExpression(String fieldName)
      Description copied from interface: DatatypeHelper
      Returns a JavaCodeFragment containing the code for converting the value (of the given field) to a string representation with respect to its data type. The String must be built so that it can be read using the valueOf-Expression. If the value is null, the toString-code will yield null as a result.

      The default implementation will call the values toString() method or return null . The default implementation for generic (extensible) data types will call the method defined using setToStringMethodName(). Custom DatatypeHelpers may override.

      Specified by:
      getToStringExpression in interface BaseDatatypeHelper<JavaCodeFragment>
      Specified by:
      getToStringExpression in interface DatatypeHelper
      Overrides:
      getToStringExpression in class AbstractDatatypeHelper
      Parameters:
      fieldName - the name of the field in the generated class that should be converted to a string
      Returns:
      a JavaCodeFragment containing the toString() code.

    • valueOfExpression

      protected JavaCodeFragment valueOfExpression(String expression)
      Description copied from class: AbstractDatatypeHelper
      This method is supposed to be overridden by subclasses.

      It is used within the newInstanceFromExpression(String) method. It returns a JavaCodeFragment with sourcecode that creates an instance of the datatype's Java class with the given expression.

      If the expression is null the fragment's sourcecode is either the String "null" or the sourcecode to get an instance of the appropriate null object. Preconditions: Expression may not be null or empty. When evaluated the expression must return a String.

      Specified by:
      valueOfExpression in class AbstractDatatypeHelper

    • newInstance

      public JavaCodeFragment newInstance(String value)
      Description copied from interface: DatatypeHelper
      Returns a JavaCodeFragment with sourcecode that creates an instance of the datatype's Java class with the given value. If the value is null the fragment's sourcecode is either the String "null" or the sourcecode to get an instance of the appropriate null object.

    • getRangeJavaClassName

      public String getRangeJavaClassName(boolean useTypesafeCollections)
      Description copied from interface: DatatypeHelper
      Returns the qualified Java class name of the range class of the datatype this is a helper for.
      Specified by:
      getRangeJavaClassName in interface DatatypeHelper
      Overrides:
      getRangeJavaClassName in class AbstractDatatypeHelper

    • newRangeInstance

      public JavaCodeFragment newRangeInstance(JavaCodeFragment lowerBoundExp, JavaCodeFragment upperBoundExp, JavaCodeFragment stepExp, JavaCodeFragment containsNullExp, boolean useTypesafeCollections)
      Description copied from interface: DatatypeHelper
      Returns a JavaCodeFragment containing the source code to create a new instance of a type specific range.
      Specified by:
      newRangeInstance in interface DatatypeHelper
      Overrides:
      newRangeInstance in class AbstractDatatypeHelper
      Parameters:
      lowerBoundExp - the lower bound expression of the range. Can be null to indicate that the lower bound is open
      upperBoundExp - the upper bound expression of the range. Can be null to indicate that the upper bound is open.
      stepExp - the minimum increment expression for values within the lower and upper bounds. Can be null to indicate that this is a continuous range.
      containsNullExp - the containsNull expression
      Returns:
      the code fragment to create a new range instance. Can be null to indicate that a range is not supported.