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Java example source code file (AbstractRepository.java)

This example Java source code file (AbstractRepository.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractrepository, ast, genericsfactory, reifier, tree

The AbstractRepository.java Java example source code

/*
 * 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 sun.reflect.generics.factory.GenericsFactory;
import sun.reflect.generics.tree.Tree;
import sun.reflect.generics.visitor.Reifier;


/**
 * Abstract superclass for representing the generic type information for
 * a reflective entity.
 * 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 abstract class AbstractRepository<T extends Tree> {

    // A factory used to produce reflective objects. Provided when the
    //repository is created. Will vary across implementations.
    private GenericsFactory factory;

    private T tree; // the AST for the generic type info

    //accessors
    private GenericsFactory getFactory() { return factory;}

    /**
     * Accessor for <tt>tree.
     * @return the cached AST this repository holds
     */
    protected T getTree(){ return tree;}

    /**
     * Returns a <tt>Reifier used to convert parts of the
     * AST into reflective objects.
     * @return  a <tt>Reifier used to convert parts of the
     * AST into reflective objects
     */
    protected Reifier getReifier(){return Reifier.make(getFactory());}

    /**
     * Constructor. Should only be used by subclasses. Concrete subclasses
     * should make their constructors private and provide public factory
     * methods.
     * @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
     */
    protected AbstractRepository(String rawSig, GenericsFactory f) {
        tree = parse(rawSig);
        factory = f;
    }

    /**
     * Returns the AST for the genric type info of this entity.
     * @param s - a string representing the generic signature of this
     * entity
     * @return the AST for the generic type info of this entity.
     */
    protected abstract T parse(String s);
}

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