Package org.faktorips.codegen.dthelpers

Class AbstractPrimitiveDatatypeHelper

java.lang.Object

org.faktorips.codegen.dthelpers.AbstractDatatypeHelper

org.faktorips.codegen.dthelpers.AbstractPrimitiveDatatypeHelper

All Implemented Interfaces:

BaseDatatypeHelper<JavaCodeFragment>, DatatypeHelper, PrimitiveDatatypeHelper

Direct Known Subclasses:

PrimitiveBooleanHelper, PrimitiveIntegerHelper, PrimitiveLongHelper

public abstract class AbstractPrimitiveDatatypeHelper
extends AbstractDatatypeHelper
implements PrimitiveDatatypeHelper

Abstract base class for all primitive datatypes.

Author:

Jan Ortmann

Field Summary

Fields inherited from interface org.faktorips.codegen.DatatypeHelper

BIG_DECIMAL, BOOLEAN, DECIMAL, INTEGER, LONG, MONEY, PRIMITIVE_BOOLEAN, PRIMITIVE_INTEGER, STRING

Constructor Summary

Constructors

Constructor	Description
AbstractPrimitiveDatatypeHelper()
AbstractPrimitiveDatatypeHelper(Datatype datatype)

Method Summary

Modifier and Type	Method	Description
JavaCodeFragment	getToStringExpression(String fieldName)	Returns a JavaCodeFragment containing the code for converting the value (of the given field) to a string representation with respect to its data type.
JavaCodeFragment	newEnumValueSetInstance(String[] values, boolean containsNull)
JavaCodeFragment	newEnumValueSetInstance(JavaCodeFragment valueCollection, JavaCodeFragment containsNullExpression)
JavaCodeFragment	newInstanceFromExpression(String expression)	Returns a JavaCodeFragment with sourcecode that creates an instance of the datatype's Java class with the given expression.
JavaCodeFragment	nullExpression()	Returns "null".

Methods inherited from class org.faktorips.codegen.dthelpers.AbstractDatatypeHelper

createCastExpression, getDatatype, getRangeJavaClassName, newEnumValueSetInstance, newEnumValueSetInstance, newInstanceFromExpression, newRangeInstance, newSafeCopy, referenceOrSafeCopyIfNeccessary, setDatatype, valueOfExpression

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.faktorips.codegen.DatatypeHelper

createCastExpression, getDatatype, getJavaClassName, getRangeJavaClassName, getValueSetJavaClassName, newEnumValueSetInstance, newEnumValueSetInstance, newInstance, newInstanceFromExpression, newRangeInstance, newValueInstance, referenceOrSafeCopyIfNeccessary, setDatatype

Methods inherited from interface org.faktorips.codegen.PrimitiveDatatypeHelper

getWrapperTypeHelper, toWrapper

Constructor Details

AbstractPrimitiveDatatypeHelper

public AbstractPrimitiveDatatypeHelper()

AbstractPrimitiveDatatypeHelper

public AbstractPrimitiveDatatypeHelper(Datatype datatype)

Method Details

newInstanceFromExpression

public JavaCodeFragment newInstanceFromExpression(String expression)

Description copied from interface: DatatypeHelper

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. When evaluated the expression must return a string.

Specified by:

newInstanceFromExpression in interface BaseDatatypeHelper<JavaCodeFragment>

Specified by:

newInstanceFromExpression in interface DatatypeHelper

Overrides:

newInstanceFromExpression in class AbstractDatatypeHelper

Parameters:

expression - A Java source code expression that yields a String. Examples are a constant String like "FOO", a variable like foo or a method call like getÍd().

nullExpression

public JavaCodeFragment nullExpression()

Description copied from class: AbstractDatatypeHelper

Returns "null". Returns a JavaCodeFragment with sourcecode that is either the String "null" or the sourcecode to get an instance of the appropriate null object.

Specified by:

nullExpression in interface BaseDatatypeHelper<JavaCodeFragment>

Specified by:

nullExpression in interface DatatypeHelper

Overrides:

nullExpression in class AbstractDatatypeHelper

newEnumValueSetInstance

public JavaCodeFragment newEnumValueSetInstance(JavaCodeFragment valueCollection,
 JavaCodeFragment containsNullExpression)

newEnumValueSetInstance

public JavaCodeFragment newEnumValueSetInstance(String[] values,
 boolean containsNull)

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.