/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.api.permissions;

import org.apereo.portal.api.Principal;
import org.springframework.util.Assert;

/* package-private */ class AssignmentImpl implements Assignment {

    private static final long serialVersionUID = 1L;

    private final Owner owner;
    private final Activity activity;
    private final Principal principal;
    private final Target target;
    private final boolean inherited;

    public AssignmentImpl(
            Owner owner, Activity activity, Principal principal, Target target, boolean inherited) {

        Assert.notNull(owner, "Argument 'owner' cannot be null");
        Assert.notNull(activity, "Argument 'activity' cannot be null");
        Assert.notNull(principal, "Argument 'principal' cannot be null");
        // NB:  Target may be null

        this.owner = owner;
        this.activity = activity;
        this.principal = principal;
        this.target = target;
        this.inherited = inherited;
    }

    @Override
    public Activity getActivity() {
        return activity;
    }

    @Override
    public Owner getOwner() {
        return owner;
    }

    @Override
    public Principal getPrincipal() {
        return principal;
    }

    @Override
    public Target getTarget() {
        return target;
    }

    @Override
    public boolean isInherited() {
        return inherited;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((activity == null) ? 0 : activity.hashCode());
        result = prime * result + (inherited ? 1231 : 1237);
        result = prime * result + ((owner == null) ? 0 : owner.hashCode());
        result = prime * result + ((principal == null) ? 0 : principal.hashCode());
        result = prime * result + ((target == null) ? 0 : target.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        AssignmentImpl other = (AssignmentImpl) obj;
        if (activity == null) {
            if (other.activity != null) return false;
        } else if (!activity.equals(other.activity)) return false;
        if (inherited != other.inherited) return false;
        if (owner == null) {
            if (other.owner != null) return false;
        } else if (!owner.equals(other.owner)) return false;
        if (principal == null) {
            if (other.principal != null) return false;
        } else if (!principal.equals(other.principal)) return false;
        if (target == null) {
            if (other.target != null) return false;
        } else if (!target.equals(other.target)) return false;
        return true;
    }

    @Override
    public String toString() {
        return "AssignmentImpl [owner="
                + owner
                + ", activity="
                + activity
                + ", principal="
                + principal
                + ", target="
                + target
                + ", inherited="
                + inherited
                + "]";
    }
}