93 lines
3.7 KiB
Java
93 lines
3.7 KiB
Java
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/*
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* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.dyn;
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/**
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* This class consists exclusively of static names internal to the
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* method handle implementation.
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* Usage: {@code import static java.dyn.MethodHandleStatics.*}
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* @author John Rose, JSR 292 EG
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*/
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/*non-public*/ class MethodHandleStatics {
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private MethodHandleStatics() { } // do not instantiate
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/*non-public*/ static String getNameString(MethodHandle target, MethodType type) {
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if (type == null)
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type = target.type();
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MemberName name = null;
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if (target != null)
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name = MethodHandleNatives.getMethodName(target);
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if (name == null)
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return "invoke" + type;
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return name.getName() + type;
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}
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/*non-public*/ static String getNameString(MethodHandle target, MethodHandle typeHolder) {
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return getNameString(target, typeHolder == null ? (MethodType) null : typeHolder.type());
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}
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/*non-public*/ static String getNameString(MethodHandle target) {
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return getNameString(target, (MethodType) null);
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}
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/*non-public*/ static String addTypeString(Object obj, MethodHandle target) {
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String str = String.valueOf(obj);
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if (target == null) return str;
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int paren = str.indexOf('(');
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if (paren >= 0) str = str.substring(0, paren);
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return str + target.type();
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}
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static void checkSpreadArgument(Object av, int n) {
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if (av == null ? n != 0 : ((Object[])av).length != n)
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throw newIllegalArgumentException("Array is not of length "+n);
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}
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// handy shared exception makers (they simplify the common case code)
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/*non-public*/ static RuntimeException newIllegalStateException(String message) {
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return new IllegalStateException(message);
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}
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/*non-public*/ static RuntimeException newIllegalStateException(String message, Object obj) {
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return new IllegalStateException(message(message, obj));
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}
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/*non-public*/ static RuntimeException newIllegalArgumentException(String message) {
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return new IllegalArgumentException(message);
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}
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/*non-public*/ static RuntimeException newIllegalArgumentException(String message, Object obj) {
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return new IllegalArgumentException(message(message, obj));
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}
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/*non-public*/ static Error uncaughtException(Exception ex) {
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Error err = new InternalError("uncaught exception");
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err.initCause(ex);
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return err;
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}
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private static String message(String message, Object obj) {
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if (obj != null) message = message + ": " + obj;
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return message;
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}
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}
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