ELResolver
.@Deprecated public abstract class PropertyResolver extends Object
PropertyResolver represents a pluggable mechanism for accessing a "property" of an underlying Java
object instance. Different PropertyResolver
implementations can support property resolution on instances of
different Java classes (such as introspection-based access to properties of a JavaBeans component, or
get()
and put()
calls on a java.util.Map
instance).
All implementations must respect the rules for JavaBeans component, java.util.Map
,
java.util.List
and array instances defined for each method but are allowed to add custom semantics for
other types.
Constructor and Description |
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PropertyResolver()
Deprecated.
|
Modifier and Type | Method and Description |
---|---|
abstract Class |
getType(Object base,
int index)
Deprecated.
Return the
java.lang.Class representing the type of the specified index. |
abstract Class |
getType(Object base,
Object property)
Deprecated.
Return the
java.lang.Class representing the type of the specified property. |
abstract Object |
getValue(Object base,
int index)
Deprecated.
Return the value at the specified index of the specified base object.
|
abstract Object |
getValue(Object base,
Object property)
Deprecated.
Return the value of the specified property from the specified base object.
|
abstract boolean |
isReadOnly(Object base,
int index)
Deprecated.
Checks if the specified index is read-only.
|
abstract boolean |
isReadOnly(Object base,
Object property)
Deprecated.
Checks if the specified property is read-only.
|
abstract void |
setValue(Object base,
int index,
Object value)
Deprecated.
Set the value at the specified index of the specified base object.
|
abstract void |
setValue(Object base,
Object property,
Object value)
Deprecated.
Set the specified value of the specified property on the specified base object.
|
public abstract Object getValue(Object base, Object property) throws EvaluationException, PropertyNotFoundException
Return the value of the specified property from the specified base object.
For a bean base object, the property is coerced to a String
and used as the property name. For all other
base object types (e.g., a Map), the property is used without any coercing.
base
- The base object whose property value is to be returnedproperty
- The property to be returnednull
if base
or property
is null
,
or if the property doesn't exist and the base object is a Map
instanceEvaluationException
- if an exception is thrown while getting the property value (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the specified property for a bean base object does not exist or is not readablepublic abstract Object getValue(Object base, int index) throws EvaluationException, PropertyNotFoundException
Return the value at the specified index of the specified base object.
base
- The base object whose property value is to be returnedindex
- The index of the value to returnnull
if base
is null
, or if the index is out of
bounds for the base objectEvaluationException
- if an exception is thrown while getting the property value (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the index is out of bounds or if base
is null
public abstract void setValue(Object base, Object property, Object value) throws EvaluationException, PropertyNotFoundException
Set the specified value of the specified property on the specified base object.
For a bean base object, the property is coerced to a String
and used as the property name. For all other
base object types (e.g., a Map), the property is used without any coercing.
base
- The base object whose property value is to be setproperty
- The property to be setvalue
- The value of the property to be setEvaluationException
- if an exception is thrown while setting the property value (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the specified bean base object property does not exist or is not writeable, or
if base
or name
is null
public abstract void setValue(Object base, int index, Object value) throws EvaluationException, PropertyNotFoundException
Set the value at the specified index of the specified base object.
base
- The base object whose property value is to be setindex
- The index of the value to setvalue
- The value to be setEvaluationException
- if an exception is thrown while setting the property value (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the index is out of bounds or if base
is null
public abstract boolean isReadOnly(Object base, Object property) throws EvaluationException, PropertyNotFoundException
Checks if the specified property is read-only.
For a bean base object, the property is coerced to a String
and used as the property name. For all other
base object types (e.g., a Map), the property is used without any coercing.
base
- The base object whose property is to be analyzedproperty
- The property to be analyzedtrue
if the specified property of the specified base object is known to be immutable; otherwise
false
EvaluationException
- if an exception is thrown while testing the property (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the specified bean base object property does not exist or if base
or property
is null
public abstract boolean isReadOnly(Object base, int index) throws EvaluationException, PropertyNotFoundException
Checks if the specified index is read-only.
base
- The base object whose property is to be analyzedindex
- The index of the value whose type is to be returnedtrue
if the value at the specified index of the specified base object is known to be immutable;
otherwise, false
EvaluationException
- if an exception is thrown while testing the property (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the index is out of bounds or if base
is null
public abstract Class getType(Object base, Object property) throws EvaluationException, PropertyNotFoundException
Return the java.lang.Class
representing the type of the specified property. An instance of any Object of
that type my be set as the value of that property, as long as the property is not read-only. The actual value of the
property, if non-null, is guaranteed to be an instance of this type, or an instance of a subclass of this type. This
method is also useful for discovering the type of Objects that may be set as the value of the property.
For a bean base object, the property is coerced to a String
and used as the property name. For all other
base object types (e.g., a Map), the property is used without any coercing.
base
- The base object whose property is to be analyzedproperty
- The property to be analyzedjava.lang.Class
representing the type of the specified property of the specified base
object, if it can be determined; otherwise null
EvaluationException
- if an exception is thrown while testing the property (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the specified bean base object property does not exist or if base
or property
is null
public abstract Class getType(Object base, int index) throws EvaluationException, PropertyNotFoundException
Return the java.lang.Class
representing the type of the specified index.
base
- The base object whose property is to be analyzedindex
- The index of the value whose type is to be returnedjava.lang.Class
representing the type of value at the specified index of the specified base
object, if it can be determined; otherwise null
EvaluationException
- if an exception is thrown while testing the property (the thrown exception must be
included as the cause
property of this exception)PropertyNotFoundException
- if the index is out of bounds or if base
is null
Copyright © 2018,2020 Eclipse Foundation.
Use is subject to license terms.