com.sun.tools.javac.code.MissingInfoHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2019, 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
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*/
package com.sun.tools.javac.code;
import com.sun.source.util.ParameterNameProvider;
import com.sun.tools.javac.code.Symbol.ParamSymbol;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Names;
/**
* A Context class, that can return additional useful information for Symbols, currently
* parameter names. It does so by calling user-supplied {@link ParameterNameProvider}.
*
* This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.
*/
public class MissingInfoHandler {
protected static final Context.Key missingInfoHandlerWrapperKey = new Context.Key<>();
public static MissingInfoHandler instance(Context context) {
MissingInfoHandler instance = context.get(missingInfoHandlerWrapperKey);
if (instance == null)
instance = new MissingInfoHandler(context);
return instance;
}
private final Names names;
private ParameterNameProvider parameterNameProvider;
protected MissingInfoHandler(Context context) {
context.put(missingInfoHandlerWrapperKey, this);
names = Names.instance(context);
}
public Name getParameterName(ParamSymbol parameter) {
if (parameterNameProvider != null) {
CharSequence name = parameterNameProvider.getParameterName(parameter);
if (name != null) {
return names.fromString(name.toString());
}
}
return null;
}
public void setDelegate(ParameterNameProvider delegate) {
this.parameterNameProvider = delegate;
}
}