/*
* 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
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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*/
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
/**代码未完, 请加载全部代码(NowJava.com).**/