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/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.robovm.compiler.util.generic;

import java.util.Arrays;

public final class ImplForWildcard implements WildcardType {

    private final ListOfTypes extendsBound, superBound;

    public ImplForWildcard(ListOfTypes extendsBound, ListOfTypes superBound) {
        this.extendsBound = extendsBound;
        this.superBound = superBound;
    }

    public Type[] getLowerBounds() {
        return superBound.getResolvedTypes().clone();
    }

    public Type[] getUpperBounds() {
        return extendsBound.getResolvedTypes().clone();
    }

    @Override
    public boolean equals(Object o) {
        if(!(o instanceof WildcardType)) {
            return false;
        }
        WildcardType that = (WildcardType) o;
        return Arrays.equals(getLowerBounds(), that.getLowerBounds()) &&
                Arrays.equals(getUpperBounds(), that.getUpperBounds());
    }

    @Override
    public int hashCode() {
        return 31 * Arrays.hashCode(getLowerBounds()) +
                Arrays.hashCode(getUpperBounds());
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("?");
        if ((extendsBound.length() == 1 && !extendsBound.getResolvedTypes()[0].equals(new SootClassType("java.lang.Object")))
                || extendsBound.length() > 1) {
            sb.append(" extends ").append(extendsBound);
        } else if (superBound.length() > 0) {
            sb.append(" super ").append(superBound);
        }
        return sb.toString();
    }

    @Override
    public String toGenericSignature() {
        if ((extendsBound.length() == 1 && !extendsBound.getResolvedTypes()[0].equals(new SootClassType("java.lang.Object")))
                || extendsBound.length() > 1) {
            return "+" + extendsBound.getResolvedTypes()[0].toGenericSignature();
        } else if (superBound.length() > 0) {
            return "+" + superBound.getResolvedTypes()[0].toGenericSignature();
        }
        return "*";
    }
}