92 lines
3.5 KiB
Java
92 lines
3.5 KiB
Java
/*
|
|
* Copyright (c) 2003, 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
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
package sun.reflect.generics.repository;
|
|
|
|
|
|
import java.lang.reflect.Type;
|
|
import sun.reflect.generics.factory.GenericsFactory;
|
|
import sun.reflect.generics.tree.TypeSignature;
|
|
import sun.reflect.generics.parser.SignatureParser;
|
|
import sun.reflect.generics.visitor.Reifier;
|
|
|
|
|
|
|
|
/**
|
|
* This class represents the generic type information for a constructor.
|
|
* The code is not dependent on a particular reflective implementation.
|
|
* It is designed to be used unchanged by at least core reflection and JDI.
|
|
*/
|
|
public class FieldRepository extends AbstractRepository<TypeSignature> {
|
|
|
|
private Type genericType; // caches the generic type info
|
|
|
|
// protected, to enforce use of static factory yet allow subclassing
|
|
protected FieldRepository(String rawSig, GenericsFactory f) {
|
|
super(rawSig, f);
|
|
}
|
|
|
|
protected TypeSignature parse(String s) {
|
|
return SignatureParser.make().parseTypeSig(s);
|
|
}
|
|
|
|
/**
|
|
* Static factory method.
|
|
* @param rawSig - the generic signature of the reflective object
|
|
* that this repository is servicing
|
|
* @param f - a factory that will provide instances of reflective
|
|
* objects when this repository converts its AST
|
|
* @return a <tt>FieldRepository</tt> that manages the generic type
|
|
* information represented in the signature <tt>rawSig</tt>
|
|
*/
|
|
public static FieldRepository make(String rawSig,
|
|
GenericsFactory f) {
|
|
return new FieldRepository(rawSig, f);
|
|
}
|
|
|
|
// public API
|
|
|
|
/*
|
|
* When queried for a particular piece of type information, the
|
|
* general pattern is to consult the corresponding cached value.
|
|
* If the corresponding field is non-null, it is returned.
|
|
* If not, it is created lazily. This is done by selecting the appropriate
|
|
* part of the tree and transforming it into a reflective object
|
|
* using a visitor.
|
|
* a visitor, which is created by feeding it the factory
|
|
* with which the repository was created.
|
|
*/
|
|
|
|
public Type getGenericType(){
|
|
if (genericType == null) { // lazily initialize generic type
|
|
Reifier r = getReifier(); // obtain visitor
|
|
getTree().accept(r); // reify subtree
|
|
// extract result from visitor and cache it
|
|
genericType = r.getResult();
|
|
}
|
|
return genericType; // return cached result
|
|
}
|
|
}
|