/*

 * Copyright (c) 2012, 2014, 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 com.sun.tools.jdeps;

import com.sun.tools.classfile.ClassFile;

import com.sun.tools.classfile.Dependency.Location;

import java.io.IOException;

import java.nio.file.Path;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

import java.util.concurrent.ConcurrentHashMap;

/**

 * Represents the source of the class files.

 */

public class Archive {

    public static Archive getInstance(Path p) throws IOException {

        return new Archive(p, ClassFileReader.newInstance(p));

    }

    private final Path path;

    private final String filename;

    private final ClassFileReader reader;

    protected Map<Location, Set<Location>> deps = new ConcurrentHashMap<>();

    protected Archive(String name) {

        this(name, null);

    }

    protected Archive(String name, ClassFileReader reader) {

        this.path = null;

        this.filename = name;

        this.reader = reader;

    }

    protected Archive(Path p, ClassFileReader reader) {

        this.path = p;

        this.filename = path.getFileName().toString();

        this.reader = reader;

    }

    public ClassFileReader reader() {

        return reader;

    }

    public String getName() {

        return filename;

    }

    public void addClass(Location origin) {

        Set<Location> set = deps.get(origin);

        if (set == null) {

            set = new HashSet<>();

            deps.put(origin, set);

        }

    }

    public void addClass(Location origin, Location target) {

        Set<Location> set = deps.get(origin);

        if (set == null) {

            set = new HashSet<>();

            deps.put(origin, set);

        }

        set.add(target);

    }

    public Set<Location> getClasses() {

        return deps.keySet();

    }

    public void visitDependences(Visitor v) {

        for (Map.Entry<Location,Set<Location>> e: deps.entrySet()) {

            for (Location target : e.getValue()) {

                v.visit(e.getKey(), target);

            }

        }

    }

    public boolean isEmpty() {

        return getClasses().isEmpty();

    }

    public String getPathName() {

        return path != null ? path.toString() : filename;

    }

    public String toString() {

        return filename;

    }

    interface Visitor {

        void visit(Location origin, Location target);

    }

}