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java.lang.Objectorg.mozilla.javascript.NativeWith
public class NativeWith
This class implements the object lookup required for the
with statement.
It simply delegates every action to its prototype except
for operations on its parent.
| Field Summary | |
|---|---|
protected Scriptable |
parent
|
protected Scriptable |
prototype
|
| Fields inherited from interface org.mozilla.javascript.Scriptable |
|---|
NOT_FOUND |
| Constructor Summary | |
|---|---|
protected |
NativeWith(Scriptable parent,
Scriptable prototype)
|
| Method Summary | |
|---|---|
void |
delete(int index)
Removes a property from this object. |
void |
delete(java.lang.String id)
Removes a property from this object. |
java.lang.Object |
execIdCall(IdFunctionObject f,
Context cx,
Scriptable scope,
Scriptable thisObj,
java.lang.Object[] args)
'thisObj' will be null if invoked as constructor, in which case instance of Scriptable should be returned |
java.lang.Object |
get(int index,
Scriptable start)
Get a property from the object selected by an integral index. |
java.lang.Object |
get(java.lang.String id,
Scriptable start)
Get a named property from the object. |
java.lang.String |
getClassName()
Get the name of the set of objects implemented by this Java class. |
java.lang.Object |
getDefaultValue(java.lang.Class<?> typeHint)
Get the default value of the object with a given hint. |
java.lang.Object[] |
getIds()
Get an array of property ids. |
Scriptable |
getParentScope()
Get the parent scope of the object. |
Scriptable |
getPrototype()
Get the prototype of the object. |
boolean |
has(int index,
Scriptable start)
Indicates whether or not an indexed property is defined in an object. |
boolean |
has(java.lang.String id,
Scriptable start)
Indicates whether or not a named property is defined in an object. |
boolean |
hasInstance(Scriptable value)
The instanceof operator. |
void |
put(int index,
Scriptable start,
java.lang.Object value)
Sets an indexed property in this object. |
void |
put(java.lang.String id,
Scriptable start,
java.lang.Object value)
Sets a named property in this object. |
void |
setParentScope(Scriptable parent)
Set the parent scope of the object. |
void |
setPrototype(Scriptable prototype)
Set the prototype of the object. |
protected java.lang.Object |
updateDotQuery(boolean value)
Must return null to continue looping or the final collection result. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected Scriptable prototype
protected Scriptable parent
| Constructor Detail |
|---|
protected NativeWith(Scriptable parent,
Scriptable prototype)
| Method Detail |
|---|
public java.lang.String getClassName()
ScriptableSee ECMA 8.6.2 and 15.2.4.2.
getClassName in interface Scriptable
public boolean has(java.lang.String id,
Scriptable start)
Scriptable
The property is specified by a String name
as defined for the get method.
has in interface Scriptableid - the name of the propertystart - the object in which the lookup began
Scriptable.get(String, Scriptable),
ScriptableObject.getProperty(Scriptable, String)
public boolean has(int index,
Scriptable start)
Scriptable
The property is specified by an integral index
as defined for the get method.
has in interface Scriptableindex - the numeric index for the propertystart - the object in which the lookup began
Scriptable.get(int, Scriptable),
ScriptableObject.getProperty(Scriptable, int)
public java.lang.Object get(java.lang.String id,
Scriptable start)
Scriptableget 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:
get in interface Scriptableid - the name of the propertystart - the object in which the lookup began
Context.getUndefinedValue()
public java.lang.Object get(int index,
Scriptable start)
Scriptableget(String, Scriptable) except that
an integral index is used to select the property.
get in interface Scriptableindex - the numeric index for the propertystart - the object in which the lookup began
Scriptable.get(String,Scriptable)
public void put(java.lang.String id,
Scriptable start,
java.lang.Object value)
Scriptable
The property is specified by a string name
as defined for get.
The possible values that may be passed in are as defined for
get. A class that implements this method may choose
to ignore calls to set certain properties, in which case those
properties are effectively read-only.
For properties defined in a prototype chain,
use putProperty in ScriptableObject.
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:
Arbitrary Java objects may be wrapped in a Scriptable by first calling
Context.toObject. This allows the property of a JavaScript
object to contain an arbitrary Java object as a value.
Note that has will be called by the runtime first before
set is called to determine in which object the
property is defined.
Note that this method is not expected to traverse the prototype chain,
which is different from the ECMA [[Put]] operation.
put in interface Scriptableid - the name of the propertystart - the object whose property is being setvalue - value to set the property toScriptable.has(String, Scriptable),
Scriptable.get(String, Scriptable),
ScriptableObject.putProperty(Scriptable, String, Object),
Context.toObject(Object, Scriptable)
public void put(int index,
Scriptable start,
java.lang.Object value)
Scriptable
The property is specified by an integral index
as defined for get.
Identical to put(String, Scriptable, Object) except that
an integral index is used to select the property.
put in interface Scriptableindex - the numeric index for the propertystart - the object whose property is being setvalue - value to set the property toScriptable.has(int, Scriptable),
Scriptable.get(int, Scriptable),
ScriptableObject.putProperty(Scriptable, int, Object),
Context.toObject(Object, Scriptable)public void delete(java.lang.String id)
ScriptableA 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, see deleteProperty in ScriptableObject.
delete in interface Scriptableid - the identifier for the propertyScriptable.get(String, Scriptable),
ScriptableObject.deleteProperty(Scriptable, String)public void delete(int index)
Scriptableget.
To delete properties defined in a prototype chain,
see deleteProperty in ScriptableObject.
Identical to delete(String) except that
an integral index is used to select the property.
delete in interface Scriptableindex - the numeric index for the propertyScriptable.get(int, Scriptable),
ScriptableObject.deleteProperty(Scriptable, int)public Scriptable getPrototype()
Scriptable
getPrototype in interface Scriptablepublic void setPrototype(Scriptable prototype)
Scriptable
setPrototype in interface Scriptableprototype - the prototype to setpublic Scriptable getParentScope()
Scriptable
getParentScope in interface Scriptablepublic void setParentScope(Scriptable parent)
Scriptable
setParentScope in interface Scriptableparent - the parent scope to setpublic java.lang.Object[] getIds()
Scriptable
getIds in interface Scriptablepublic java.lang.Object getDefaultValue(java.lang.Class<?> typeHint)
Scriptable
A hint of null means "no hint".
See ECMA 8.6.2.6.
getDefaultValue in interface ScriptabletypeHint - the type hint
public boolean hasInstance(Scriptable value)
ScriptableThe 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 Scriptablevalue - The value that appeared on the LHS of the instanceof
operator
protected java.lang.Object updateDotQuery(boolean value)
public java.lang.Object execIdCall(IdFunctionObject f,
Context cx,
Scriptable scope,
Scriptable thisObj,
java.lang.Object[] args)
IdFunctionCall
execIdCall in interface IdFunctionCall
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