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java.lang.Objectjavax.faces.el.PropertyResolver
public abstract class PropertyResolver
Provides methods to read, write and inspect properties of javabeans, Maps, Arrays and Lists. This class is used by such things as the ValueBinding implementation and the ManagedBeanBuilder to access JSF beans. See the javadoc of the JSF Specification for more details.
Constructor Summary | |
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PropertyResolver()
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Method Summary | |
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abstract Class |
getType(Object base,
int index)
Returns the datatype of the specified element within a list or array. |
abstract Class |
getType(Object base,
Object property)
Returns the datatype of the specified javabean property on the specified object. |
abstract Object |
getValue(Object base,
int index)
Return the specified element from a list or array. |
abstract Object |
getValue(Object base,
Object property)
Return the current value of the specified property on the base object. |
abstract boolean |
isReadOnly(Object base,
int index)
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abstract boolean |
isReadOnly(Object base,
Object property)
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abstract void |
setValue(Object base,
int index,
Object value)
Replace the object at the specified index within the base collection with the provided value. |
abstract void |
setValue(Object base,
Object property,
Object value)
Set the named property on the base object to the provided value. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public PropertyResolver()
Method Detail |
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public abstract Class getType(Object base, int index) throws EvaluationException, PropertyNotFoundException
Param base must be of type Array or List.
EvaluationException
PropertyNotFoundException
public abstract Class getType(Object base, Object property) throws EvaluationException, PropertyNotFoundException
Param base may be a map, in which case param property is used as a key into the map, and the type of the object with that key is returned. If there is no such key in the map, then Object.class is returned.
Otherwise java.beans.Introspector is used to determine the actual property type. If the base bean has no such property then a PropertyNotFoundException is thrown.
base
- must not be null.property
- must be of type String, must not be null and
must not be an empty string.
EvaluationException
PropertyNotFoundException
public abstract Object getValue(Object base, int index) throws EvaluationException, PropertyNotFoundException
Param base must be of type Array or List. When the array is of a primitive type, the appropriate wrapper is returned.
Null is returned when param index is "out of bounds" for the provided base object.
ReferenceSyntaxException
- if the base object is not an Array
or List.
EvaluationException
PropertyNotFoundException
public abstract Object getValue(Object base, Object property) throws EvaluationException, PropertyNotFoundException
If base is a Map, then Map.get(property) is returned. Null is returned if there is no entry with that key.
Otherwise, java.beans.Introspector is applied to the base object to find the associated PropertyDescriptor and the specified read method is invoked.
PropertyNotFoundException
- if the provided object does
not have the specified property.
EvaluationException
public abstract boolean isReadOnly(Object base, int index) throws EvaluationException, PropertyNotFoundException
EvaluationException
PropertyNotFoundException
public abstract boolean isReadOnly(Object base, Object property) throws EvaluationException, PropertyNotFoundException
EvaluationException
PropertyNotFoundException
public abstract void setValue(Object base, int index, Object value) throws EvaluationException, PropertyNotFoundException
Param base is expected to be an Array or List object.
EvaluationException
- if the base object is not an Array or List.
PropertyNotFoundException
- if the index is "out of bounds".public abstract void setValue(Object base, Object property, Object value) throws EvaluationException, PropertyNotFoundException
EvaluationException
PropertyNotFoundException
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