/*

 * Copyright (c) 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

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package com.sun.tools.sjavac.comp.dependencies;

import java.util.Collections;

import java.util.HashSet;

import java.util.Objects;

import java.util.Set;

import java.util.stream.Collectors;

import com.sun.tools.javac.code.Symbol.ClassSymbol;

import com.sun.tools.javac.code.Symbol.PackageSymbol;

import com.sun.tools.javac.code.Symbol.TypeSymbol;

import com.sun.tools.javac.code.Kinds;

import com.sun.tools.javac.code.Type;

public class TypeAndSupertypesDependency implements Dependency {

    protected TypeSymbol type;

    public TypeAndSupertypesDependency(TypeSymbol type) {

        this.type = Objects.requireNonNull(type);

    }

    private Set<TypeSymbol> allSupertypes(TypeSymbol t) {

        if (t == null)

            return Collections.emptySet();

        Set<TypeSymbol> result = new HashSet<>();

        result.add(t);

        if (t instanceof ClassSymbol) {

            ClassSymbol cs = (ClassSymbol) t;

            result.addAll(allSupertypes(cs.getSuperclass().tsym));

            for (Type it : cs.getInterfaces())

                result.addAll(allSupertypes(it.tsym));

        }

        return result;

    }

    @Override

    public Set<PackageSymbol> getPackages() {

            return Collections.emptySet();

        if (type instanceof ClassSymbol) {

            return allSupertypes(type).stream()

                                      .map(TypeSymbol::packge)

                                      .collect(Collectors.toSet());

        }

        throw new AssertionError("Could not get package name for " + type);

    }

}