itextsharp barcode example vb.net The validator Element in Java

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The validator Element
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The validator element is used to encapsulate the set of elements specifying the details for a validator This element has no other use than to denote the beginning and end of the validator details
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DTD Definition
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Following is the DTD definition for the validator element:
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<!ELEMENT validator ((descriptionGroup | (description*, display-name*, icon*)), validator-id, validator-class, attribute*, property*, validator-extension*)>
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Rule JSF Versions Parent Elements Child Elements Value 10, 11, 12 faces-config attribute, description (10, 11), descriptionGroup (12), displayname (10, 11), icon (10, 11), property, validator-class, validator-extension (12), validator-id Note: The parenthetical numbers represent the JSF versions that the corresponding child element applies to if the child element does not apply to all JSF versions Uniqueness Constraints None
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Example Usage
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The following example illustrates the usage of the validator element:
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<faces-config> <validator> <validator-id> javaxfacesLength </validator-id>
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JavaServer Faces Configuration File
<validator-class> javaxfacesvalidatorLengthValidator </validator-class> </validator> </faces-config>
The validator-class Element
The validator-class element is used to specify the fully qualified class name for a validator implementation The implementation must implement the javaxfacesvalidatorValidator interface
DTD Definition
Following is the DTD definition for the validator-class element:
<!ELEMENT validator-class (#PCDATA)>
Usage Rules
Rule JSF Versions Parent Elements Child Elements Uniqueness Constraints Value 10, 11, 12 validator None None
Example Usage
The following example illustrates the usage of the validator-class element:
<faces-config> <validator> <validator-id> javaxfacesLength </validator-id> <validator-class> javaxfacesvalidatorLengthValidator </validator-class> </validator> </faces-config>
PART IV
The validator-id Element
The validator-id element is used to specify the logical name for a validator The logical name is used to register the validator with JSF so that it can later be accessed by the same logical name
DTD Definition
Following is the DTD definition for the validator-id element:
<!ELEMENT validator-id (#PCDATA)>
Part IV:
JavaSer ver Faces Tools and Libraries
Usage Rules
Rule JSF Versions Parent Elements Child Elements Uniqueness Constraints Value 10, 11, 12 validator None Values for this element must be unique within the configuration file
Example Usage
The following example illustrates the usage of the validator-id element:
<faces-config> <validator> <validator-id> javaxfacesLength </validator-id> <validator-class> javaxfacesvalidatorLengthValidator </validator-class> </validator> </faces-config>
The value Element
The value element is used to specify the literal value or value binding expression that generates a value for a list entry, managed property, or map entry
DTD Definition
Following is the DTD definition for the value element:
<!ELEMENT value (#PCDATA)>
Usage Rules
Rule JSF Versions Parent Elements Child Elements Uniqueness Constraints Value 10, 11, 12 list-entries, managed-property, map-entry None None
Example Usage
There are three ways that the value element can be used The first way, shown here, uses the value element to specify list entry values:
18:
JavaServer Faces Configuration File
<faces-config> <managed-bean> <managed-bean-name> testManagedBean </managed-bean-name> <managed-bean-class> comexamplejsfTestManagedBean </managed-bean-class> <managed-bean-scope> session </managed-bean-scope> <managed-property> <property-name>testProperty</property-name> <list-entries> <value>1000</value> <value>#{myBeanmyProperty}</value> <list-entries> </managed-property> </managed-bean> </faces-config>
The second way to use the value element is for a managed property and is shown here:
<faces-config> <managed-bean> <managed-bean-name> testManagedBean </managed-bean-name> <managed-bean-class> comexamplejsfTestManagedBean </managed-bean-class> <managed-bean-scope> session </managed-bean-scope> <managed-property> <property-name>testProperty</property-name> <value>testValue</value> </managed-property> </managed-bean> </faces-config>
PART IV
Following is the third way to use the value element:
<faces-config> <managed-bean> <managed-bean-name> testManagedBean </managed-bean-name> <managed-bean-class> comexamplejsfTestManagedBean </managed-bean-class>
Part IV:
JavaSer ver Faces Tools and Libraries
<managed-bean-scope> session </managed-bean-scope> <managed-property> <property-name>testProperty</property-name> <map-entries> <map-entry> <key>testKey1</key> <value>1000</value> </map-entry> <map-entry> <key>testKey2</key> <null-value/> </map-entry> <map-entries> </managed-property> </managed-bean> </faces-config>
The value-class Element
The value-class element is used to specify the fully qualified class name of an object type that all values will be converted to before being added to a list defined by a list-entries element or a map defined by a map-entries element If this element is not nested inside a list-entries or map-entries element, all list or map entry values will default to javalang String as their object type There are two ways that the value-class element can be used, as listed here and shown later in the Example Usage section To specify the fully qualified class name of an object type for list entry values by nesting value-class elements inside the list-entries element To specify the fully qualified class name of an object type for map entry values by nesting value-class elements inside the map-entries element
DTD Definition
Following is the DTD definition for the value-class element:
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