define
public void define(String propertyName,
Object value,
int attributes)
The value can be any of the following type:
java.lang.Boolean
java.lang.Number
java.lang.String
org.apache.bsf.debug.jsdi.JsObject
- define in interface JsObject
define
public void define(String propertyName,
JsObject value,
int attributes)
delete
public void delete(String name)
Removes a property from this object.
This operation corresponds to the ECMA [[Delete]] except that
the no result is returned. The runtime will guarantee that this
method is called only if the property exists. After this method
is called, the runtime will call Scriptable.has to see if the
property has been removed in order to determine the boolean
result of the delete operator as defined by ECMA 11.4.1.
A property can be made permanent by ignoring calls to remove
it.
The property is specified by a String name
as defined for
get
.
To delete properties defined in a prototype chain,
first find the owner object of the property and then
call deleteProperty on that owner object.
- delete in interface JsObject
name
- the identifier for the property
org.mozilla.javascript.Scriptable.get
, org.mozilla.javascript.ScriptableObject.deleteProperty
delete
public void delete(int index)
Removes a property from this object.
The prototype chain is not walked to find the
property.
This operation corresponds to the ECMA [[Delete]] except that
the no result is returned. The runtime will guarantee that this
method is called only if the property exists. After this method
is called, the runtime will call Scriptable.has to see if the
property has been removed in order to determine the boolean
result of the delete operator as defined by ECMA 11.4.1.
A property can be made permanent by ignoring calls to remove
it.
The property is specified by an integral index
as defined for
get
.
To delete properties defined in a prototype chain,
first find the owner object of the property and then
call deleteProperty on that owner object.
Identical to
delete(String)
except that
an integral index is used to select the property.
- delete in interface JsObject
index
- the numeric index for the property
org.mozilla.javascript.Scriptable.get
, org.mozilla.javascript.ScriptableObject.deleteProperty
get
public Object get(String name)
throws RemoteException
Get a named property from the object.
Does not walk the prototype chain.
Looks property up in this object and returns the associated value
if found. Returns NOT_FOUND if not found.
Note that this method is not expected to traverse the prototype
chain. This is different from the ECMA [[Get]] operation.
Depending on the property selector, the runtime will call
this method or the form of
get
that takes an
integer:
JavaScript code | Java code |
a.b | a.get("b", a) |
a["foo"] | a.get("foo", a) |
a[3] | a.get(3, a) |
a["3"] | a.get(3, a) |
a[3.0] | a.get(3, a) |
a["3.0"] | a.get("3.0", a) |
a[1.1] | a.get("1.1", a) |
a[-4] | a.get(-4, a) |
The values that may be returned are limited to the following:
- java.lang.Boolean objects
- java.lang.String objects
- java.lang.Number objects
- org.apache.bsf.debug.jsdi.JsObject objects
- null
- The value returned by Context.getUndefinedValue()
- NOT_FOUND
- get in interface JsObject
name
- the name of the property
- the value of the property (may be null), or NOT_FOUND
get
public Object get(int index)
throws RemoteException
- get in interface JsObject
getClassName
public String getClassName()
Get the name of the set of objects implemented by this Java class.
This corresponds to the [[Class]] operation in ECMA and is used
by Object.prototype.toString() in ECMA.
See ECMA 8.6.2 and 15.2.4.2.
- getClassName in interface JsObject
getDefaultValue
public Object getDefaultValue(Class hint)
Get the default value of the object with a given hint.
The hints are String.class for type String, Number.class for type
Number, Scriptable.class for type Object, and Boolean.class for
type Boolean.
A
hint
of null means "no hint".
See ECMA 8.6.2.6.
- getDefaultValue in interface JsObject
hint
- the type hint
- the default value
getIds
public Object[] getIds(boolean all)
Returns an array of property ids defined on this object.
The prototype chain is not walked.
However, modified properties that were prototype properties
will be seen.
The parameter indicates to enumerate the "DONTENUM" properties
or not.
- getIds in interface JsObject
- an array of all ids from all object in the prototype chain.
If a given id occurs multiple times in the prototype chain,
it will occur only once in this list.
The elements are limited to:
- java.lang.String for the property name if it has one.
- java.lang.Integer for properties without a name, it is their index.
- 1.5R2
getPrototype
public JsObject getPrototype()
throws RemoteException
Get the prototype of the object.
- getPrototype in interface JsObject
- the prototype
getScope
public JsObject getScope()
throws RemoteException
The scope is for supporting two things.
If the object is a function, the scope is the "execution" scope
of the function. It will be used when calling the function to
initialize the Context scope.
If the object is not a function, the scope is used for the scope
chain of execution context.
- getScope in interface JsObject
has
public boolean has(String name)
Indicates whether or not a named property is defined in an object.
Does not traverse the prototype chain.
The property is specified by a String name
as defined for the
get
method.
- has in interface JsObject
name
- the name of the property
- true if and only if the named property is found in the object
org.mozilla.javascript.Scriptable.get
, org.mozilla.javascript.ScriptableObject.getProperty
has
public boolean has(int index)
Indicates whether or not an indexed property is defined in an object.
Does not traverse the prototype chain.
The property is specified by an integral index
as defined for the
get
method.
- has in interface JsObject
index
- the numeric index for the property
- true if and only if the indexed property is found in the object
org.mozilla.javascript.Scriptable.get
, org.mozilla.javascript.ScriptableObject.getProperty
hasInstance
public boolean hasInstance(JsObject instance)
The instanceof operator.
The JavaScript code "lhs instanceof rhs" causes rhs.hasInstance(lhs) to
be called.
The return value is implementation dependent so that embedded host objects can
return an appropriate value. See the JS 1.3 language documentation for more
detail.
This operator corresponds to the proposed EMCA [[HasInstance]] operator.
- hasInstance in interface JsObject
instance
- The value that appeared on the LHS of the instanceof
operator
- an implementation dependent value
isWrapper
public boolean isWrapper()
put
public void put(String name,
Object value)
Sets a named property in this object.
The property is specified by a string name
as defined for
get
.
Note that if a property
a is defined in the prototype
p
of an object
o, then evaluating
o.a = 23
will cause
set
to be called on the prototype
p with
o as the
start parameter.
To preserve JavaScript semantics, it is the Scriptable
object's responsibility to modify
o.
This design allows properties to be defined in prototypes and implemented
in terms of getters and setters of Java values without consuming slots
in each instance.
The values that may be set are limited to the following:
- java.lang.Boolean objects
- java.lang.String objects
- java.lang.Number objects
- org.apache.bsf.debug.jsdi.JsObject
- null
- The value returned by Context.getUndefinedValue()
IMPORTANT: JAVA OBJECTS.
The wrapping is not yet supported.
- put in interface JsObject
put
public void put(int index,
Object value)
Sets an indexed property in this object.
The property is specified by an integral index
as defined for
get
.
- put in interface JsObject
index
- the numeric index for the propertyvalue
- value to set the property to
setPrototype
public void setPrototype(JsObject prototype)
Set the prototype of the object.
- setPrototype in interface JsObject
prototype
- the prototype to set
unwrap
public Object unwrap()
wrapsJavaObject
public boolean wrapsJavaObject()