Package org.simpleframework.xml.core
Class ElementListLabel
- java.lang.Object
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- org.simpleframework.xml.core.TemplateLabel
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- org.simpleframework.xml.core.ElementListLabel
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- All Implemented Interfaces:
Label
class ElementListLabel extends TemplateLabel
TheElementListLabel
represents a label that is used to represent an XML element list in a class schema. This element list label can be used to convert an XML node into a collection of composite objects. Each element converted with the converter this creates must be an XML serializable element.- See Also:
ElementList
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Field Summary
Fields Modifier and Type Field Description private Expression
cache
This is a cache of the expression for this element list.private boolean
data
This is used to determine if the attribute is data.private Decorator
decorator
This is the decorator that is associated with the element.private Introspector
detail
This contains the details of the annotated contact object.private java.lang.String
entry
This is the name of the XML entry from the annotation.private Format
format
This is the format used to style the elements in the list.private boolean
inline
This is used to determine if the attribute is inline.private java.lang.Class
item
Represents the type of objects this list will hold.private ElementList
label
This references the annotation that the field uses.private java.lang.String
name
This is the name of the XML element from the annotation.private java.lang.String
override
This is the name of the element for this label instance.private java.lang.String
path
This is the path of the XML entry from the annotation.private boolean
required
This is used to determine if the attribute is required.private java.lang.Class
type
This is the type of collection this list will instantiate.
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Constructor Summary
Constructors Constructor Description ElementListLabel(Contact contact, ElementList label, Format format)
Constructor for theElementListLabel
object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.annotation.Annotation
getAnnotation()
This acquires the annotation associated with this label.Contact
getContact()
This is used to acquire the contact object for this label.Converter
getConverter(Context context)
This will create aConverter
for transforming an XML element into a collection of XML serializable objects.private Converter
getConverter(Context context, java.lang.String name)
This will create aConverter
for transforming an XML element into a collection of XML serializable objects.Decorator
getDecorator()
This is used to acquire theDecorator
for this.Type
getDependent()
This is used to acquire the dependent type for the annotated list.java.lang.Object
getEmpty(Context context)
This is used to provide a configured empty value used when the annotated value is null.java.lang.String
getEntry()
This is used to either provide the entry value provided within the annotation or compute a entry value.Expression
getExpression()
This method is used to return an XPath expression that is used to represent the position of this label.private Converter
getInlineConverter(Context context, java.lang.String name)
This will create aConverter
for transforming an XML element into a collection of XML serializable objects.java.lang.String
getName()
This is used to acquire the name of the element or attribute that is used by the class schema.java.lang.String
getOverride()
This is used to acquire the name of the element or attribute as taken from the annotation.java.lang.String
getPath()
This is used to acquire the path of the element or attribute that is used by the class schema.java.lang.Class
getType()
This acts as a convenience method used to determine the type of contact this represents.boolean
isCollection()
This is used to determine if the label is a collection.boolean
isData()
This is used to determine whether the annotation requires it and its children to be written as a CDATA block.boolean
isInline()
This is used to determine whether the list has been specified as inline.boolean
isRequired()
This is used to determine whether the XML element is required.java.lang.String
toString()
This is used to describe the annotation and method or field that this label represents.-
Methods inherited from class org.simpleframework.xml.core.TemplateLabel
getKey, getLabel, getNames, getPaths, getType, isAttribute, isText, isTextList, isUnion
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Field Detail
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decorator
private Decorator decorator
This is the decorator that is associated with the element.
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detail
private Introspector detail
This contains the details of the annotated contact object.
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label
private ElementList label
This references the annotation that the field uses.
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cache
private Expression cache
This is a cache of the expression for this element list.
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format
private Format format
This is the format used to style the elements in the list.
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override
private java.lang.String override
This is the name of the element for this label instance.
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entry
private java.lang.String entry
This is the name of the XML entry from the annotation.
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name
private java.lang.String name
This is the name of the XML element from the annotation.
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path
private java.lang.String path
This is the path of the XML entry from the annotation.
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type
private java.lang.Class type
This is the type of collection this list will instantiate.
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item
private java.lang.Class item
Represents the type of objects this list will hold.
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required
private boolean required
This is used to determine if the attribute is required.
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inline
private boolean inline
This is used to determine if the attribute is inline.
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data
private boolean data
This is used to determine if the attribute is data.
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Constructor Detail
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ElementListLabel
public ElementListLabel(Contact contact, ElementList label, Format format)
Constructor for theElementListLabel
object. This creates a label object, which can be used to convert an XML node to aCollection
of XML serializable objects.- Parameters:
contact
- this is the contact that this label representslabel
- the annotation that contains the schema detailsformat
- this is used to style the elements in the list
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Method Detail
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getDecorator
public Decorator getDecorator() throws java.lang.Exception
This is used to acquire theDecorator
for this. A decorator is an object that adds various details to the node without changing the overall structure of the node. For example comments and namespaces can be added to the node with a decorator as they do not affect the deserialization.- Returns:
- this returns the decorator associated with this
- Throws:
java.lang.Exception
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getConverter
public Converter getConverter(Context context) throws java.lang.Exception
This will create aConverter
for transforming an XML element into a collection of XML serializable objects. The XML schema class for these objects must be present the element list annotation.- Parameters:
context
- this is the context object used for serialization- Returns:
- this returns the converter for creating a collection
- Throws:
java.lang.Exception
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getConverter
private Converter getConverter(Context context, java.lang.String name) throws java.lang.Exception
This will create aConverter
for transforming an XML element into a collection of XML serializable objects. The XML schema class for these objects must be present the element list annotation.- Parameters:
context
- this is the context object used for serializationname
- this is the name of the XML entry element to use- Returns:
- this returns the converter for creating a collection
- Throws:
java.lang.Exception
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getInlineConverter
private Converter getInlineConverter(Context context, java.lang.String name) throws java.lang.Exception
This will create aConverter
for transforming an XML element into a collection of XML serializable objects. The XML schema class for these objects must be present the element list annotation.- Parameters:
context
- this is the context object used for serialization- Returns:
- this returns the converter for creating a collection
- Throws:
java.lang.Exception
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getEmpty
public java.lang.Object getEmpty(Context context) throws java.lang.Exception
This is used to provide a configured empty value used when the annotated value is null. This ensures that XML can be created with required details regardless of whether values are null or not. It also provides a means for sensible default values.- Parameters:
context
- this is the context object for the serialization- Returns:
- this returns the string to use for default values
- Throws:
java.lang.Exception
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getDependent
public Type getDependent() throws java.lang.Exception
This is used to acquire the dependent type for the annotated list. This will simply return the type that the collection is composed to hold. This must be a serializable type, that is, a type that is annotated with theRoot
class.- Specified by:
getDependent
in interfaceLabel
- Overrides:
getDependent
in classTemplateLabel
- Returns:
- this returns the component type for the collection
- Throws:
java.lang.Exception
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getEntry
public java.lang.String getEntry() throws java.lang.Exception
This is used to either provide the entry value provided within the annotation or compute a entry value. If the entry string is not provided the the entry value is calculated as the type of primitive the object is as a simplified class name.- Specified by:
getEntry
in interfaceLabel
- Overrides:
getEntry
in classTemplateLabel
- Returns:
- this returns the name of the XML entry element used
- Throws:
java.lang.Exception
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getName
public java.lang.String getName() throws java.lang.Exception
This is used to acquire the name of the element or attribute that is used by the class schema. The name is determined by checking for an override within the annotation. If it contains a name then that is used, if however the annotation does not specify a name the the field or method name is used instead.- Returns:
- returns the name that is used for the XML property
- Throws:
java.lang.Exception
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getPath
public java.lang.String getPath() throws java.lang.Exception
This is used to acquire the path of the element or attribute that is used by the class schema. The path is determined by acquiring the XPath expression and appending the name of the label to form a fully qualified path.- Returns:
- returns the path that is used for the XML property
- Throws:
java.lang.Exception
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getExpression
public Expression getExpression() throws java.lang.Exception
This method is used to return an XPath expression that is used to represent the position of this label. If there is no XPath expression associated with this then an empty path is returned. This will never return a null expression.- Returns:
- the XPath expression identifying the location
- Throws:
java.lang.Exception
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getAnnotation
public java.lang.annotation.Annotation getAnnotation()
This acquires the annotation associated with this label. This is typically the annotation acquired from the field or method. However, in the case of unions this will return the actual annotation within the union group that this represents.- Returns:
- this returns the annotation that this represents
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getType
public java.lang.Class getType()
This acts as a convenience method used to determine the type of contact this represents. This is used when an object is written to XML. It determines whether aclass
attribute is required within the serialized XML element, that is, if the class returned by this is different from the actual value of the object to be serialized then that type needs to be remembered.- Returns:
- this returns the type of the contact class
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getContact
public Contact getContact()
This is used to acquire the contact object for this label. The contact retrieved can be used to set any object or primitive that has been deserialized, and can also be used to acquire values to be serialized in the case of object persistence. All contacts that are retrieved from this method will be accessible.- Returns:
- returns the contact that this label is representing
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getOverride
public java.lang.String getOverride()
This is used to acquire the name of the element or attribute as taken from the annotation. If the element or attribute explicitly specifies a name then that name is used for the XML element or attribute used. If however no overriding name is provided then the method or field is used for the name.- Returns:
- returns the name of the annotation for the contact
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isData
public boolean isData()
This is used to determine whether the annotation requires it and its children to be written as a CDATA block. This is done when a primitive or other such element requires a text value and that value needs to be encapsulated within a CDATA block.- Returns:
- currently the element list does not require CDATA
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isCollection
public boolean isCollection()
This is used to determine if the label is a collection. If the label represents a collection then any original assignment to the field or method can be written to without the need to create a new collection. This allows obscure collections to be used and also allows initial entries to be maintained.- Specified by:
isCollection
in interfaceLabel
- Overrides:
isCollection
in classTemplateLabel
- Returns:
- true if the label represents a collection value
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isRequired
public boolean isRequired()
This is used to determine whether the XML element is required. This ensures that if an XML element is missing from a document that deserialization can continue. Also, in the process of serialization, if a value is null it does not need to be written to the resulting XML document.- Returns:
- true if the label represents a some required data
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isInline
public boolean isInline()
This is used to determine whether the list has been specified as inline. If the list is inline then no overrides are needed and the outer XML element for the list is not used.- Specified by:
isInline
in interfaceLabel
- Overrides:
isInline
in classTemplateLabel
- Returns:
- this returns whether the annotation is inline
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toString
public java.lang.String toString()
This is used to describe the annotation and method or field that this label represents. This is used to provide error messages that can be used to debug issues that occur when processing a method. This will provide enough information such that the problem can be isolated correctly.
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