ilog.cpl.util
Class IlpDefaultTypeConverter

java.lang.Object
  ilog.cpl.util.IlpDefaultTypeConverter

All Implemented Interfaces:

IlpTypeConverter

public class IlpDefaultTypeConverter
extends Object
implements IlpTypeConverter

The type converter is used when parsing or writing XML.

This class is used by the default context implementation.

This implementation is able to convert the following classes:

• java.lang.Boolean
• java.lang.Byte
• java.lang.Character
• java.lang.Double
• java.lang.Float
• java.lang.Integer
• java.lang.Long
• java.lang.Short
• java.lang.String
• java.awt.Color
• java.awt.Font
• java.awt.Image: the image is retrieved from the image repository present in the current application context.
• java.util.Date
• javax.swing.SwingConstants: using introspection to retrieve the constant value that corresponds to the value being converted.
• javax.swing.KeyStroke: converts a String value to a KeyStroke using the syntax described in javax.swing.KeyStroke.getKeyStroke(java.lang.String).
• ilog.util.IlEnum
• ilog.cpl.graphic.IlpPoint
• ilog.cpl.graphic.IlpRect
• ilog.cpl.graphic.views.IlpShelfItemPosition

Other classes can also be automatically converted if one of the following mechanisms is available:

• A property editor is registered for the class, using the method registerEditor(java.lang.Class, java.lang.Class).
• The class being converted provides a String based constructor, and a toString method. The toString method is used to convert the instance to a String to be written in XML. The String-based constructor is used to convert the XML String value to an instance.

This class contains a logger (IlpUtilLoggers.ilog_cpl_util_typeconverter).

Since:

JTGO 3.0

See Also:

IlpSystem.GetDefaultContext(), IlpContext.getTypeConverter(), IlpImageRepository, IlpUtilLoggers.ilog_cpl_util_typeconverter

Constructor Summary

IlpDefaultTypeConverter(IlpContext context)
Creates a type converter.

Method Summary

Object	convertTo(Class type, Object value) General conversion method to convert a non-null value.
Object	createJavaInstance(Class type, String value) Creates a Java instance from a class type.
String	createStringValue(Class type, Object value) Creates a String value from a general Java Object.
IlpSAXSerializable	getAttributeValueHandler(Class attributeValueClass) Returns the way an attribute should be read from or written in XML, depending on its Java class.
void	registerEditor(Class targetType, Class editorClass) Registers a property editor for a given target class.
void	setAttributeValueHandler(Class attributeValueClass, IlpSAXSerializable serializableAttribute) Sets the way an attribute should be read from or written in XML depending on its Java class.

Methods inherited from class java.lang.Object

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

Constructor Detail

IlpDefaultTypeConverter

public IlpDefaultTypeConverter(IlpContext context)

Creates a type converter.

Parameters:

context - Service context used to access the URL access service and the image repository.

Method Detail

createJavaInstance

public Object createJavaInstance(Class type,
                                 String value)

Creates a Java instance from a class type.

The value is initialized with the supplied string value. IlEnum, dates, colors, and fonts are specifically supported. Icons are also specifically supported to add a full path to the icon name. Otherwise, all Java basic types and any Java class that has a string constructor are supported.

Specified by:

createJavaInstance in interface IlpTypeConverter

Parameters:

type - The class of the instance to be created.

value - The value to be assigned to the new instance.

Returns:

The Java instance from the given type.

createStringValue

public String createStringValue(Class type,
                                Object value)

Creates a String value from a general Java Object.

This method produces string values that can be used in an XML file. Dates, colors and fonts produce strings that are correctly formatted for use in data storage XML files. Any types that are not specifically handled return the result by calling toString() on the value.

Specified by:

createStringValue in interface IlpTypeConverter

Parameters:

type - Target type. The type may be null for general conversion. It can be set to a different value when the conversion is done, to a type that should be different from the value type. This implementation only considers this parameter when the conversion is being done from Integer to SwingConstants, or when using a PropertyEditor. Please note that the PropertyEditor implementation must be able to execute the conversion from the instance to String appropriately.

value - The instance to be converted to a string value.

Returns:

The string value associated with the Object instance.

getAttributeValueHandler

public IlpSAXSerializable getAttributeValueHandler(Class attributeValueClass)

Returns the way an attribute should be read from or written in XML, depending on its Java class.

Note that the subclasses of IlEnum are considered as not having a corresponding IlpSAXSerializable if the method setAttributeValueHandler has not been called explicitly for this class. This avoids calling Class.forName for each subclass of IlEnum.

Specified by:

getAttributeValueHandler in interface IlpTypeConverter

Parameters:

attributeValueClass - The class of the attribute to be read from or written in XML.

Returns:

The IlpSAXSerializable that contains the way the attribute should be read from or written in XML.

setAttributeValueHandler

public void setAttributeValueHandler(Class attributeValueClass,
                                     IlpSAXSerializable serializableAttribute)

Sets the way an attribute should be read from or written in XML depending on its Java class.

Parameters:

attributeValueClass - The class of the attribute to be read from or written in XML.

serializableAttribute - The IlpSAXSerializable that contains the way the attribute should be read from or written in XML.

registerEditor

public void registerEditor(Class targetType,
                           Class editorClass)

Registers a property editor for a given target class.

The property editor is used to convert the target class from an instance to a String and vice-versa, so that it can be written in XML format.

The following predefined target classes should not be modified:

• Date.class
• Boolean.class
• Boolean.TYPE
• Color.class
• Font.class
• IlpPoint.class
• IlpRect.class
• IlpShelfItemPosition.class

Parameters:

targetType - The Class object of the type to be edited.

editorClass - The Class object of the property editor class. If this is null, then any existing editor for the given target class is removed (doing so for a predefined target class will lead to errors).

Since:

JTGO 4.0

convertTo

public Object convertTo(Class type,
                        Object value)

General conversion method to convert a non-null value.

This method is able to:

• Convert a String value to a given type (See createJavaInstance(Class, String))
• Convert an instance to String (See createStringValue(Class, Object))
• and convert number types.

You can override this method to extend this behavior providing different types of conversions.

Specified by:

convertTo in interface IlpTypeConverter

Parameters:

type - Target class to convert.

value - The instance to be converted.