33 import sun.invoke.util.ValueConversions;
34 import sun.invoke.util.VerifyAccess;
35 import sun.invoke.util.Wrapper;
36 import sun.reflect.CallerSensitive;
37 import sun.reflect.Reflection;
38 import sun.reflect.misc.ReflectUtil;
39 import sun.security.util.SecurityConstants;
40 import static java.lang.invoke.MethodHandleStatics.*;
41 import static java.lang.invoke.MethodHandleNatives.Constants.*;
42 import java.util.concurrent.ConcurrentHashMap;
43 import sun.security.util.SecurityConstants;
44
45 /**
46 * This class consists exclusively of static methods that operate on or return
47 * method handles. They fall into several categories:
48 * <ul>
49 * <li>Lookup methods which help create method handles for methods and fields.
50 * <li>Combinator methods, which combine or transform pre-existing method handles into new ones.
51 * <li>Other factory methods to create method handles that emulate other common JVM operations or control flow patterns.
52 * </ul>
53 * <p>
54 * @author John Rose, JSR 292 EG
55 * @since 1.7
56 */
57 public class MethodHandles {
58
59 private MethodHandles() { } // do not instantiate
60
61 private static final MemberName.Factory IMPL_NAMES = MemberName.getFactory();
62 static { MethodHandleImpl.initStatics(); }
63 // See IMPL_LOOKUP below.
64
65 //// Method handle creation from ordinary methods.
66
67 /**
68 * Returns a {@link Lookup lookup object} with
69 * full capabilities to emulate all supported bytecode behaviors of the caller.
70 * These capabilities include <a href="MethodHandles.Lookup.html#privacc">private access</a> to the caller.
71 * Factory methods on the lookup object can create
72 * <a href="MethodHandleInfo.html#directmh">direct method handles</a>
73 * for any member that the caller has access to via bytecodes,
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33 import sun.invoke.util.ValueConversions;
34 import sun.invoke.util.VerifyAccess;
35 import sun.invoke.util.Wrapper;
36 import sun.reflect.CallerSensitive;
37 import sun.reflect.Reflection;
38 import sun.reflect.misc.ReflectUtil;
39 import sun.security.util.SecurityConstants;
40 import static java.lang.invoke.MethodHandleStatics.*;
41 import static java.lang.invoke.MethodHandleNatives.Constants.*;
42 import java.util.concurrent.ConcurrentHashMap;
43 import sun.security.util.SecurityConstants;
44
45 /**
46 * This class consists exclusively of static methods that operate on or return
47 * method handles. They fall into several categories:
48 * <ul>
49 * <li>Lookup methods which help create method handles for methods and fields.
50 * <li>Combinator methods, which combine or transform pre-existing method handles into new ones.
51 * <li>Other factory methods to create method handles that emulate other common JVM operations or control flow patterns.
52 * </ul>
53 *
54 * @author John Rose, JSR 292 EG
55 * @since 1.7
56 */
57 public class MethodHandles {
58
59 private MethodHandles() { } // do not instantiate
60
61 private static final MemberName.Factory IMPL_NAMES = MemberName.getFactory();
62 static { MethodHandleImpl.initStatics(); }
63 // See IMPL_LOOKUP below.
64
65 //// Method handle creation from ordinary methods.
66
67 /**
68 * Returns a {@link Lookup lookup object} with
69 * full capabilities to emulate all supported bytecode behaviors of the caller.
70 * These capabilities include <a href="MethodHandles.Lookup.html#privacc">private access</a> to the caller.
71 * Factory methods on the lookup object can create
72 * <a href="MethodHandleInfo.html#directmh">direct method handles</a>
73 * for any member that the caller has access to via bytecodes,
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