| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import jdk.dynalink.CallSiteDescriptor; |
| import jdk.dynalink.NamedOperation; |
| import jdk.dynalink.NamespaceOperation; |
| import jdk.dynalink.Operation; |
| import jdk.dynalink.StandardNamespace; |
| import jdk.dynalink.StandardOperation; |
| import jdk.dynalink.linker.GuardedInvocation; |
| import jdk.dynalink.linker.GuardingDynamicLinker; |
| import jdk.dynalink.linker.GuardingDynamicLinkerExporter; |
| import jdk.dynalink.linker.LinkRequest; |
| import jdk.dynalink.linker.LinkerServices; |
| import jdk.dynalink.linker.support.SimpleLinkRequest; |
| |
| /** |
| * This is a dynalink pluggable linker (see http://openjdk.java.net/jeps/276). |
| * This linker translater underscore_separated method names to CamelCase names |
| * used in Java APIs. |
| */ |
| public final class UnderscoreNameLinkerExporter extends GuardingDynamicLinkerExporter { |
| static { |
| System.out.println("pluggable dynalink underscore name linker loaded"); |
| } |
| |
| private static final Pattern UNDERSCORE_NAME = Pattern.compile("_(.)"); |
| |
| // translate underscore_separated name as a CamelCase name |
| private static String translateToCamelCase(final String name) { |
| final Matcher m = UNDERSCORE_NAME.matcher(name); |
| final StringBuilder buf = new StringBuilder(); |
| while (m.find()) { |
| m.appendReplacement(buf, m.group(1).toUpperCase()); |
| } |
| m.appendTail(buf); |
| return buf.toString(); |
| } |
| |
| @Override |
| public List<GuardingDynamicLinker> get() { |
| final ArrayList<GuardingDynamicLinker> linkers = new ArrayList<>(); |
| linkers.add(new GuardingDynamicLinker() { |
| @Override |
| public GuardedInvocation getGuardedInvocation(final LinkRequest request, |
| final LinkerServices linkerServices) throws Exception { |
| final CallSiteDescriptor desc = request.getCallSiteDescriptor(); |
| final Operation op = desc.getOperation(); |
| final Object name = NamedOperation.getName(op); |
| final Operation namespaceOp = NamedOperation.getBaseOperation(op); |
| // is this a named GET_METHOD? |
| final boolean isGetMethod = |
| NamespaceOperation.getBaseOperation(namespaceOp) == StandardOperation.GET |
| && StandardNamespace.findFirst(namespaceOp) == StandardNamespace.METHOD; |
| if (isGetMethod && name instanceof String) { |
| final String str = (String)name; |
| if (str.indexOf('_') == -1) { |
| return null; |
| } |
| |
| final String nameStr = translateToCamelCase(str); |
| // create a new call descriptor to use translated name |
| final CallSiteDescriptor newDesc = desc.changeOperation(((NamedOperation)op).changeName(nameStr)); |
| // create a new Link request to link the call site with translated name |
| final LinkRequest newRequest = request.replaceArguments(newDesc, request.getArguments()); |
| // return guarded invocation linking the translated request |
| return linkerServices.getGuardedInvocation(newRequest); |
| } |
| |
| return null; |
| } |
| }); |
| return linkers; |
| } |
| } |