modules/schema/src/main/java/org/apache/ignite/internal/schema/definition/builder/PartialIndexDefinitionBuilderImpl.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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
 *
 *      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.apache.ignite.internal.schema.definition.builder;

import java.util.Map;
import java.util.stream.Collectors;
import org.apache.ignite.internal.schema.definition.index.PartialIndexDefinitionImpl;
import org.apache.ignite.internal.schema.definition.index.SortedIndexColumnDefinitionImpl;
import org.apache.ignite.schema.definition.builder.PartialIndexDefinitionBuilder;
import org.apache.ignite.schema.definition.index.PartialIndexDefinition;

/**
 * Partial index builder.
 */
public class PartialIndexDefinitionBuilderImpl extends SortedIndexDefinitionBuilderImpl implements PartialIndexDefinitionBuilder {
    /** Partial index expression. */
    private String expr;

    /**
     * Constructor.
     *
     * @param idxName Index name.
     */
    public PartialIndexDefinitionBuilderImpl(String idxName) {
        super(idxName);
    }

    /** {@inheritDoc} */
    @Override public PartialIndexDefinitionBuilderImpl withHints(Map<String, String> hints) {
        super.withHints(hints);

        return this;
    }

    /** {@inheritDoc} */
    @Override public PartialIndexDefinition build() {
        assert expr != null && !expr.trim().isEmpty();

        return new PartialIndexDefinitionImpl(
            name,
            cols.values().stream().map(c -> new SortedIndexColumnDefinitionImpl(c.name, c.asc)).collect(Collectors.toList()),
            expr,
            unique()
        );
    }

    /** {@inheritDoc} */
    @Override public PartialIndexDefinitionBuilder withExpression(String expr) {
        this.expr = expr;

        return this;
    }

    /** {@inheritDoc} */
    @Override public PartialIndexColumnBuilderImpl addIndexColumn(String name) {
        return new PartialIndexColumnBuilderImpl(this).withName(name);
    }

    /**
     * Index column builder.
     */
    private static class PartialIndexColumnBuilderImpl extends SortedIndexColumnBuilderImpl implements PartialIndexColumnBuilder {
        /**
         * Constructor.
         *
         * @param idxBuilder Index builder.
         */
        PartialIndexColumnBuilderImpl(PartialIndexDefinitionBuilderImpl idxBuilder) {
            super(idxBuilder);
        }

        /** {@inheritDoc} */
        @Override public PartialIndexColumnBuilderImpl desc() {
            super.desc();

            return this;
        }

        /** {@inheritDoc} */
        @Override public PartialIndexColumnBuilderImpl asc() {
            super.asc();

            return this;
        }

        /** {@inheritDoc} */
        @Override public PartialIndexColumnBuilderImpl withName(String name) {
            super.withName(name);

            return this;
        }

        /** {@inheritDoc} */
        @Override public PartialIndexDefinitionBuilderImpl done() {
            return (PartialIndexDefinitionBuilderImpl)super.done();
        }
    }
}