1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/rt/emul/compact/src/main/java/java/lang/invoke/InfoFromMemberName.java Sun Aug 17 20:09:05 2014 +0200
1.3 @@ -0,0 +1,145 @@
1.4 +/*
1.5 + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package java.lang.invoke;
1.30 +
1.31 +import java.security.*;
1.32 +import java.lang.reflect.*;
1.33 +import java.lang.invoke.MethodHandleNatives.Constants;
1.34 +import java.lang.invoke.MethodHandles.Lookup;
1.35 +import static java.lang.invoke.MethodHandleStatics.*;
1.36 +
1.37 +/*
1.38 + * Auxiliary to MethodHandleInfo, wants to nest in MethodHandleInfo but must be non-public.
1.39 + */
1.40 +/*non-public*/
1.41 +final
1.42 +class InfoFromMemberName implements MethodHandleInfo {
1.43 + private final MemberName member;
1.44 + private final int referenceKind;
1.45 +
1.46 + InfoFromMemberName(Lookup lookup, MemberName member, byte referenceKind) {
1.47 + assert(member.isResolved() || member.isMethodHandleInvoke());
1.48 + assert(member.referenceKindIsConsistentWith(referenceKind));
1.49 + this.member = member;
1.50 + this.referenceKind = referenceKind;
1.51 + }
1.52 +
1.53 + @Override
1.54 + public Class<?> getDeclaringClass() {
1.55 + return member.getDeclaringClass();
1.56 + }
1.57 +
1.58 + @Override
1.59 + public String getName() {
1.60 + return member.getName();
1.61 + }
1.62 +
1.63 + @Override
1.64 + public MethodType getMethodType() {
1.65 + return member.getMethodOrFieldType();
1.66 + }
1.67 +
1.68 + @Override
1.69 + public int getModifiers() {
1.70 + return member.getModifiers();
1.71 + }
1.72 +
1.73 + @Override
1.74 + public int getReferenceKind() {
1.75 + return referenceKind;
1.76 + }
1.77 +
1.78 + @Override
1.79 + public String toString() {
1.80 + return MethodHandleInfo.toString(getReferenceKind(), getDeclaringClass(), getName(), getMethodType());
1.81 + }
1.82 +
1.83 + @Override
1.84 + public <T extends Member> T reflectAs(Class<T> expected, Lookup lookup) {
1.85 + if (member.isMethodHandleInvoke() && !member.isVarargs()) {
1.86 + // This member is an instance of a signature-polymorphic method, which cannot be reflected
1.87 + // A method handle invoker can come in either of two forms:
1.88 + // A generic placeholder (present in the source code, and varargs)
1.89 + // and a signature-polymorphic instance (synthetic and not varargs).
1.90 + // For more information see comments on {@link MethodHandleNatives#linkMethod}.
1.91 + throw new IllegalArgumentException("cannot reflect signature polymorphic method");
1.92 + }
1.93 + Member mem = AccessController.doPrivileged(new PrivilegedAction<Member>() {
1.94 + public Member run() {
1.95 + try {
1.96 + return reflectUnchecked();
1.97 + } catch (ReflectiveOperationException ex) {
1.98 + throw new IllegalArgumentException(ex);
1.99 + }
1.100 + }
1.101 + });
1.102 + try {
1.103 + Class<?> defc = getDeclaringClass();
1.104 + byte refKind = (byte) getReferenceKind();
1.105 + lookup.checkAccess(refKind, defc, convertToMemberName(refKind, mem));
1.106 + } catch (IllegalAccessException ex) {
1.107 + throw new IllegalArgumentException(ex);
1.108 + }
1.109 + return expected.cast(mem);
1.110 + }
1.111 +
1.112 + private Member reflectUnchecked() throws ReflectiveOperationException {
1.113 + byte refKind = (byte) getReferenceKind();
1.114 + Class<?> defc = getDeclaringClass();
1.115 + boolean isPublic = Modifier.isPublic(getModifiers());
1.116 + if (MethodHandleNatives.refKindIsMethod(refKind)) {
1.117 + if (isPublic)
1.118 + return defc.getMethod(getName(), getMethodType().parameterArray());
1.119 + else
1.120 + return defc.getDeclaredMethod(getName(), getMethodType().parameterArray());
1.121 + } else if (MethodHandleNatives.refKindIsConstructor(refKind)) {
1.122 + if (isPublic)
1.123 + return defc.getConstructor(getMethodType().parameterArray());
1.124 + else
1.125 + return defc.getDeclaredConstructor(getMethodType().parameterArray());
1.126 + } else if (MethodHandleNatives.refKindIsField(refKind)) {
1.127 + if (isPublic)
1.128 + return defc.getField(getName());
1.129 + else
1.130 + return defc.getDeclaredField(getName());
1.131 + } else {
1.132 + throw new IllegalArgumentException("referenceKind="+refKind);
1.133 + }
1.134 + }
1.135 +
1.136 + private static MemberName convertToMemberName(byte refKind, Member mem) throws IllegalAccessException {
1.137 + if (mem instanceof Method) {
1.138 + boolean wantSpecial = (refKind == REF_invokeSpecial);
1.139 + return new MemberName((Method) mem, wantSpecial);
1.140 + } else if (mem instanceof Constructor) {
1.141 + return new MemberName((Constructor) mem);
1.142 + } else if (mem instanceof Field) {
1.143 + boolean isSetter = (refKind == REF_putField || refKind == REF_putStatic);
1.144 + return new MemberName((Field) mem, isSetter);
1.145 + }
1.146 + throw new InternalError(mem.getClass().getName());
1.147 + }
1.148 +}