| /* |
| * 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.processors.cache.query; |
| |
| import java.io.Externalizable; |
| import java.util.Collection; |
| |
| /** |
| * Ignite index descriptor. |
| * <p> |
| * All index descriptors can be obtained from |
| * {@link GridCacheSqlMetadata#indexes(String)} method. |
| * @see GridCacheSqlMetadata |
| */ |
| public interface GridCacheSqlIndexMetadata extends Externalizable { |
| /** |
| * Gets name of the index. |
| * |
| * @return Index name. |
| */ |
| public String name(); |
| |
| /** |
| * Gets names of fields indexed by this index. |
| * |
| * @return Indexed fields names. |
| */ |
| public Collection<String> fields(); |
| |
| /** |
| * Gets order of the index for each indexed field. |
| * |
| * @param field Field name. |
| * @return {@code True} if given field is indexed in descending order. |
| */ |
| public boolean descending(String field); |
| |
| /** |
| * @return Descendings. |
| */ |
| public Collection<String> descendings(); |
| |
| /** |
| * Gets whether this is a unique index. |
| * |
| * @return {@code True} if index is unique, {@code false} otherwise. |
| */ |
| public boolean unique(); |
| } |