SecureLookupSupplier (Java SE 12 & JDK 12 )

java.lang.Object
- jdk.dynalink.SecureLookupSupplier

Direct Known Subclasses:

CallSiteDescriptor
```
public class SecureLookupSupplier
extends Object
```
Provides security-checked access to a MethodHandles.Lookup object. See getLookup() for details.

Field Summary

Fields
Modifier and Type Field Description

static String GET_LOOKUP_PERMISSION_NAME
The name of a runtime permission required to successfully invoke the getLookup() method.

Constructor Summary

Constructors
Constructor Description

SecureLookupSupplier(MethodHandles.Lookup lookup)
Creates a new secure lookup supplier, securing the passed lookup.

Method Summary

Modifier and Type	Method	Description
`MethodHandles.Lookup`	`getLookup()`	Returns the lookup secured by this `SecureLookupSupplier`.
`protected MethodHandles.Lookup`	`getLookupPrivileged()`	Returns the value of `getLookup()` without a security check.

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GET_LOOKUP_PERMISSION_NAME
```
public static final String GET_LOOKUP_PERMISSION_NAME
```
    The name of a runtime permission required to successfully invoke the getLookup() method.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SecureLookupSupplier
```
public SecureLookupSupplier(MethodHandles.Lookup lookup)
```
    Creates a new secure lookup supplier, securing the passed lookup.
    
    Parameters:
    
    lookup - the lookup to secure. Can not be null.
    
    Throws:
    
    NullPointerException - if null is passed.
- Method Detail
  - getLookup
```
public final MethodHandles.Lookup getLookup()
```
    Returns the lookup secured by this SecureLookupSupplier.
    
    Returns:
    
    the lookup secured by this SecureLookupSupplier.
    
    Throws:
    
    SecurityException - if the secured lookup isn't the MethodHandles.publicLookup(), and a security manager is present, and a check for RuntimePermission("dynalink.getLookup") fails.
  - getLookupPrivileged
```
protected final MethodHandles.Lookup getLookupPrivileged()
```
    Returns the value of getLookup() without a security check. Can be used by subclasses to access the lookup quickly.
    
    Returns:
    
    same as returned value of getLookup().