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/*
Copyright (c) 2015 Red Hat, Inc.

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.ovirt.api.metamodel.concepts;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Stream;

/**
 * This class represents a method of a service.
 */
public class Method extends ServiceMember {
    // The constraints that apply to this method:
    private List constraints = new ArrayList<>();

    /**
     * Returns the list of constraints that apply to this method. The returned list is a copy of the one used
     * internally, so it is safe to modify it in any way. If you aren't going to modify the list consider using the
     * {@link #constraints()} method instead.
     */
    public List getConstraints() {
        return new CopyOnWriteArrayList<>(constraints);
    }

    /**
     * Returns a stream that delivers the constraints of this method.
     */
    public Stream constraints() {
        return constraints.stream();
    }

    /**
     * Returns the constraint that has the given name, or {@code null} if there is no such constraint.
     */
    public Constraint getConstraint(Name name) {
        return constraints.stream().filter(named(name)).findFirst().orElse(null);
    }

    /**
     * Adds a new constraint to this method.
     */
    public void addConstraint(Constraint constraint) {
        constraints.add(constraint);
    }

    /**
     * Adds a list of new constraints to this method.
     */
    public void addConstraints(List constraints) {
        this.constraints.addAll(constraints);
    }
}