software.amazon.smithy.model.shapes.UnionShape Maven / Gradle / Ivy

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/*
 * Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 software.amazon.smithy.model.shapes;

import java.util.Map;
import java.util.Optional;
import software.amazon.smithy.utils.ToSmithyBuilder;

/**
 * Tagged union shape that maps member names to member definitions.
 */
public final class UnionShape extends Shape implements ToSmithyBuilder {

    private final Map members;

    private UnionShape(Builder builder) {
        super(builder, false);
        members = NamedMemberUtils.computeMixinMembers(
                builder.getMixins(), builder.members, getId(), getSourceLocation());
        validateMemberShapeIds();
    }

    public static Builder builder() {
        return new Builder();
    }

    @Override
    public Builder toBuilder() {
        return updateBuilder(builder());
    }

    @Override
    public  R accept(ShapeVisitor visitor) {
        return visitor.unionShape(this);
    }

    @Override
    public Optional asUnionShape() {
        return Optional.of(this);
    }

    @Override
    public ShapeType getType() {
        return ShapeType.UNION;
    }

    @Override
    public Map getAllMembers() {
        return members;
    }

    /**
     * Builder used to create a {@link UnionShape}.
     */
    public static final class Builder extends NamedMembersShapeBuilder {
        @Override
        public UnionShape build() {
            return new UnionShape(this);
        }

        @Override
        public ShapeType getShapeType() {
            return ShapeType.UNION;
        }
    }
}