io.trino.spi.function.table.DescriptorArgumentSpecification Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of trino-spi Show documentation

Trino - Service Provider Interface (SPI)

There is a newer version: 458

/*
 * 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 io.trino.spi.function.table;

import io.trino.spi.Experimental;

import static io.trino.spi.function.table.Preconditions.checkArgument;

@Experimental(eta = "2022-10-31")
public class DescriptorArgumentSpecification
        extends ArgumentSpecification
{
    private DescriptorArgumentSpecification(String name, boolean required, Descriptor defaultValue)
    {
        super(name, required, defaultValue);
        checkArgument(
                defaultValue == null || defaultValue.getFields().stream().allMatch(field -> field.getName().isPresent()),
                "All fields of a descriptor argument must have names");
    }

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

    public static final class Builder
    {
        private String name;
        private boolean required = true;
        private Descriptor defaultValue;

        private Builder() {}

        public Builder name(String name)
        {
            this.name = name;
            return this;
        }

        public Builder defaultValue(Descriptor defaultValue)
        {
            this.required = false;
            this.defaultValue = defaultValue;
            return this;
        }

        public DescriptorArgumentSpecification build()
        {
            return new DescriptorArgumentSpecification(name, required, defaultValue);
        }
    }
}