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src/java.base/share/classes/java/lang/invoke/InfoFromMemberName.java

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 10  *
 11  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  * version 2 for more details (a copy is included in the LICENSE file that
 15  * accompanied this code).
 16  *
 17  * You should have received a copy of the GNU General Public License version
 18  * 2 along with this work; if not, write to the Free Software Foundation,
 19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
 24  */
 25 
 26 package java.lang.invoke;
 27 
 28 import java.security.*;
 29 import java.lang.reflect.*;
 30 import java.lang.invoke.MethodHandleNatives.Constants;
 31 import java.lang.invoke.MethodHandles.Lookup;
 32 import static java.lang.invoke.MethodHandleStatics.*;
 33 
 34 /*
 35  * Auxiliary to MethodHandleInfo, wants to nest in MethodHandleInfo but must be non-public.
 36  */
 37 /*non-public*/
 38 final class InfoFromMemberName implements MethodHandleInfo {
 39     private final MemberName member;
 40     private final int referenceKind;
 41 
 42     InfoFromMemberName(Lookup lookup, MemberName member, byte referenceKind) {
 43         assert(member.isResolved() || member.isMethodHandleInvoke() || member.isVarHandleMethodInvoke());
 44         assert(member.referenceKindIsConsistentWith(referenceKind));
 45         this.member = member;
 46         this.referenceKind = referenceKind;
 47     }
 48 
 49     @Override
 50     public Class<?> getDeclaringClass() {
 51         return member.getDeclaringClass();
 52     }

 94                         return reflectUnchecked();
 95                     } catch (ReflectiveOperationException ex) {
 96                         throw new IllegalArgumentException(ex);
 97                     }
 98                 }
 99             });
100         try {
101             Class<?> defc = getDeclaringClass();
102             byte refKind = (byte) getReferenceKind();
103             lookup.checkAccess(refKind, defc, convertToMemberName(refKind, mem));
104         } catch (IllegalAccessException ex) {
105             throw new IllegalArgumentException(ex);
106         }
107         return expected.cast(mem);
108     }
109 
110     private Member reflectUnchecked() throws ReflectiveOperationException {
111         byte refKind = (byte) getReferenceKind();
112         Class<?> defc = getDeclaringClass();
113         boolean isPublic = Modifier.isPublic(getModifiers());
114         if (MethodHandleNatives.refKindIsMethod(refKind)) {















115             if (isPublic)
116                 return defc.getMethod(getName(), getMethodType().parameterArray());
117             else
118                 return defc.getDeclaredMethod(getName(), getMethodType().parameterArray());
119         } else if (MethodHandleNatives.refKindIsConstructor(refKind)) {
120             if (isPublic)
121                 return defc.getConstructor(getMethodType().parameterArray());
122             else
123                 return defc.getDeclaredConstructor(getMethodType().parameterArray());
124         } else if (MethodHandleNatives.refKindIsField(refKind)) {
125             if (isPublic)
126                 return defc.getField(getName());
127             else
128                 return defc.getDeclaredField(getName());
129         } else {
130             throw new IllegalArgumentException("referenceKind="+refKind);
131         }
132     }
133 
134     private static MemberName convertToMemberName(byte refKind, Member mem) throws IllegalAccessException {
135         if (mem instanceof Method) {
136             boolean wantSpecial = (refKind == REF_invokeSpecial);
137             return new MemberName((Method) mem, wantSpecial);
138         } else if (mem instanceof Constructor) {
139             return new MemberName((Constructor) mem);
140         } else if (mem instanceof Field) {
141             boolean isSetter = (refKind == REF_putField || refKind == REF_putStatic);
142             return new MemberName((Field) mem, isSetter);
143         }

 10  *
 11  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  * version 2 for more details (a copy is included in the LICENSE file that
 15  * accompanied this code).
 16  *
 17  * You should have received a copy of the GNU General Public License version
 18  * 2 along with this work; if not, write to the Free Software Foundation,
 19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
 24  */
 25 
 26 package java.lang.invoke;
 27 
 28 import java.security.*;
 29 import java.lang.reflect.*;

 30 import java.lang.invoke.MethodHandles.Lookup;

 31 
 32 /*
 33  * Auxiliary to MethodHandleInfo, wants to nest in MethodHandleInfo but must be non-public.
 34  */
 35 /*non-public*/
 36 final class InfoFromMemberName implements MethodHandleInfo {
 37     private final MemberName member;
 38     private final int referenceKind;
 39 
 40     InfoFromMemberName(Lookup lookup, MemberName member, byte referenceKind) {
 41         assert(member.isResolved() || member.isMethodHandleInvoke() || member.isVarHandleMethodInvoke());
 42         assert(member.referenceKindIsConsistentWith(referenceKind));
 43         this.member = member;
 44         this.referenceKind = referenceKind;
 45     }
 46 
 47     @Override
 48     public Class<?> getDeclaringClass() {
 49         return member.getDeclaringClass();
 50     }

 92                         return reflectUnchecked();
 93                     } catch (ReflectiveOperationException ex) {
 94                         throw new IllegalArgumentException(ex);
 95                     }
 96                 }
 97             });
 98         try {
 99             Class<?> defc = getDeclaringClass();
100             byte refKind = (byte) getReferenceKind();
101             lookup.checkAccess(refKind, defc, convertToMemberName(refKind, mem));
102         } catch (IllegalAccessException ex) {
103             throw new IllegalArgumentException(ex);
104         }
105         return expected.cast(mem);
106     }
107 
108     private Member reflectUnchecked() throws ReflectiveOperationException {
109         byte refKind = (byte) getReferenceKind();
110         Class<?> defc = getDeclaringClass();
111         boolean isPublic = Modifier.isPublic(getModifiers());
112         if (member.isObjectConstructorOrStaticInitMethod()) {
113             MethodType methodType = getMethodType();
114             if (MethodHandleNatives.refKindIsObjectConstructor(refKind) &&
115                 methodType.returnType() != void.class) {
116                 // object constructor
117                 throw new IllegalArgumentException("object constructor must be of void return type");
118             } else if (MethodHandleNatives.refKindIsMethod(refKind) &&
119                        methodType.returnType() != defc.asValueType()) {
120                 // TODO: allow to return Object or perhaps one of the supertypes of that class
121                 // static init factory
122                 throw new IllegalArgumentException("static constructor must be of " + defc.getName());
123             }
124 
125             return isPublic ? defc.getConstructor(methodType.parameterArray())
126                             : defc.getDeclaredConstructor(methodType.parameterArray());
127         } else if (MethodHandleNatives.refKindIsMethod(refKind)) {
128             if (isPublic)
129                 return defc.getMethod(getName(), getMethodType().parameterArray());
130             else
131                 return defc.getDeclaredMethod(getName(), getMethodType().parameterArray());





132         } else if (MethodHandleNatives.refKindIsField(refKind)) {
133             if (isPublic)
134                 return defc.getField(getName());
135             else
136                 return defc.getDeclaredField(getName());
137         } else {
138             throw new IllegalArgumentException("referenceKind="+refKind);
139         }
140     }
141 
142     private static MemberName convertToMemberName(byte refKind, Member mem) throws IllegalAccessException {
143         if (mem instanceof Method) {
144             boolean wantSpecial = (refKind == REF_invokeSpecial);
145             return new MemberName((Method) mem, wantSpecial);
146         } else if (mem instanceof Constructor) {
147             return new MemberName((Constructor) mem);
148         } else if (mem instanceof Field) {
149             boolean isSetter = (refKind == REF_putField || refKind == REF_putStatic);
150             return new MemberName((Field) mem, isSetter);
151         }
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