diff -r 000000000000 -r c880a8a8803b rt/emul/compact/src/main/java/java/lang/invoke/InfoFromMemberName.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/rt/emul/compact/src/main/java/java/lang/invoke/InfoFromMemberName.java Sat Aug 09 11:11:13 2014 +0200 @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package java.lang.invoke; + +import java.security.*; +import java.lang.reflect.*; +import java.lang.invoke.MethodHandleNatives.Constants; +import java.lang.invoke.MethodHandles.Lookup; +import static java.lang.invoke.MethodHandleStatics.*; + +/* + * Auxiliary to MethodHandleInfo, wants to nest in MethodHandleInfo but must be non-public. + */ +/*non-public*/ +final +class InfoFromMemberName implements MethodHandleInfo { + private final MemberName member; + private final int referenceKind; + + InfoFromMemberName(Lookup lookup, MemberName member, byte referenceKind) { + assert(member.isResolved() || member.isMethodHandleInvoke()); + assert(member.referenceKindIsConsistentWith(referenceKind)); + this.member = member; + this.referenceKind = referenceKind; + } + + @Override + public Class getDeclaringClass() { + return member.getDeclaringClass(); + } + + @Override + public String getName() { + return member.getName(); + } + + @Override + public MethodType getMethodType() { + return member.getMethodOrFieldType(); + } + + @Override + public int getModifiers() { + return member.getModifiers(); + } + + @Override + public int getReferenceKind() { + return referenceKind; + } + + @Override + public String toString() { + return MethodHandleInfo.toString(getReferenceKind(), getDeclaringClass(), getName(), getMethodType()); + } + + @Override + public T reflectAs(Class expected, Lookup lookup) { + if (member.isMethodHandleInvoke() && !member.isVarargs()) { + // This member is an instance of a signature-polymorphic method, which cannot be reflected + // A method handle invoker can come in either of two forms: + // A generic placeholder (present in the source code, and varargs) + // and a signature-polymorphic instance (synthetic and not varargs). + // For more information see comments on {@link MethodHandleNatives#linkMethod}. + throw new IllegalArgumentException("cannot reflect signature polymorphic method"); + } + Member mem = AccessController.doPrivileged(new PrivilegedAction() { + public Member run() { + try { + return reflectUnchecked(); + } catch (ReflectiveOperationException ex) { + throw new IllegalArgumentException(ex); + } + } + }); + try { + Class defc = getDeclaringClass(); + byte refKind = (byte) getReferenceKind(); + lookup.checkAccess(refKind, defc, convertToMemberName(refKind, mem)); + } catch (IllegalAccessException ex) { + throw new IllegalArgumentException(ex); + } + return expected.cast(mem); + } + + private Member reflectUnchecked() throws ReflectiveOperationException { + byte refKind = (byte) getReferenceKind(); + Class defc = getDeclaringClass(); + boolean isPublic = Modifier.isPublic(getModifiers()); + if (MethodHandleNatives.refKindIsMethod(refKind)) { + if (isPublic) + return defc.getMethod(getName(), getMethodType().parameterArray()); + else + return defc.getDeclaredMethod(getName(), getMethodType().parameterArray()); + } else if (MethodHandleNatives.refKindIsConstructor(refKind)) { + if (isPublic) + return defc.getConstructor(getMethodType().parameterArray()); + else + return defc.getDeclaredConstructor(getMethodType().parameterArray()); + } else if (MethodHandleNatives.refKindIsField(refKind)) { + if (isPublic) + return defc.getField(getName()); + else + return defc.getDeclaredField(getName()); + } else { + throw new IllegalArgumentException("referenceKind="+refKind); + } + } + + private static MemberName convertToMemberName(byte refKind, Member mem) throws IllegalAccessException { + if (mem instanceof Method) { + boolean wantSpecial = (refKind == REF_invokeSpecial); + return new MemberName((Method) mem, wantSpecial); + } else if (mem instanceof Constructor) { + return new MemberName((Constructor) mem); + } else if (mem instanceof Field) { + boolean isSetter = (refKind == REF_putField || refKind == REF_putStatic); + return new MemberName((Field) mem, isSetter); + } + throw new InternalError(mem.getClass().getName()); + } +}