| /* |
| * 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.cassandra.cql3.restrictions; |
| |
| import java.util.List; |
| |
| import org.apache.cassandra.config.ColumnDefinition; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.cql3.functions.Function; |
| import org.apache.cassandra.cql3.statements.Bound; |
| import org.apache.cassandra.db.MultiCBuilder; |
| import org.apache.cassandra.db.filter.RowFilter; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.index.SecondaryIndexManager; |
| |
| /** |
| * A restriction/clause on a column. |
| * The goal of this class being to group all conditions for a column in a SELECT. |
| * |
| * <p>Implementation of this class must be immutable. See {@link #mergeWith(Restriction)} for more explanation.</p> |
| */ |
| public interface Restriction |
| { |
| public boolean isOnToken(); |
| public boolean isSlice(); |
| public boolean isEQ(); |
| public boolean isIN(); |
| public boolean isContains(); |
| public boolean isNotNull(); |
| public boolean isMultiColumn(); |
| |
| /** |
| * Returns the definition of the first column. |
| * @return the definition of the first column. |
| */ |
| public ColumnDefinition getFirstColumn(); |
| |
| /** |
| * Returns the definition of the last column. |
| * @return the definition of the last column. |
| */ |
| public ColumnDefinition getLastColumn(); |
| |
| /** |
| * Returns the column definitions in position order. |
| * @return the column definitions in position order. |
| */ |
| public List<ColumnDefinition> getColumnDefs(); |
| |
| /** |
| * Adds all functions (native and user-defined) used by any component of the restriction |
| * to the specified list. |
| * @param functions the list to add to |
| */ |
| void addFunctionsTo(List<Function> functions); |
| |
| /** |
| * Checks if the specified bound is set or not. |
| * @param b the bound type |
| * @return <code>true</code> if the specified bound is set, <code>false</code> otherwise |
| */ |
| public boolean hasBound(Bound b); |
| |
| /** |
| * Checks if the specified bound is inclusive or not. |
| * @param b the bound type |
| * @return <code>true</code> if the specified bound is inclusive, <code>false</code> otherwise |
| */ |
| public boolean isInclusive(Bound b); |
| |
| /** |
| * Merges this restriction with the specified one. |
| * |
| * <p>Restriction are immutable. Therefore merging two restrictions result in a new one. |
| * The reason behind this choice is that it allow a great flexibility in the way the merging can done while |
| * preventing any side effect.</p> |
| * |
| * @param otherRestriction the restriction to merge into this one |
| * @return the restriction resulting of the merge |
| * @throws InvalidRequestException if the restrictions cannot be merged |
| */ |
| public Restriction mergeWith(Restriction otherRestriction) throws InvalidRequestException; |
| |
| /** |
| * Check if the restriction is on indexed columns. |
| * |
| * @param indexManager the index manager |
| * @return <code>true</code> if the restriction is on indexed columns, <code>false</code> |
| */ |
| public boolean hasSupportingIndex(SecondaryIndexManager indexManager); |
| |
| /** |
| * Adds to the specified row filter the expressions corresponding to this <code>Restriction</code>. |
| * |
| * @param filter the row filter to add expressions to |
| * @param indexManager the secondary index manager |
| * @param options the query options |
| * @throws InvalidRequestException if this <code>Restriction</code> cannot be converted into a row filter |
| */ |
| public void addRowFilterTo(RowFilter filter, |
| SecondaryIndexManager indexManager, |
| QueryOptions options) |
| throws InvalidRequestException; |
| |
| /** |
| * Appends the values of this <code>Restriction</code> to the specified builder. |
| * |
| * @param builder the <code>MultiCBuilder</code> to append to. |
| * @param options the query options |
| * @return the <code>MultiCBuilder</code> |
| */ |
| public MultiCBuilder appendTo(MultiCBuilder builder, QueryOptions options); |
| |
| /** |
| * Appends the values of the <code>Restriction</code> for the specified bound to the specified builder. |
| * |
| * @param builder the <code>MultiCBuilder</code> to append to. |
| * @param bound the bound |
| * @param options the query options |
| * @return the <code>MultiCBuilder</code> |
| */ |
| public MultiCBuilder appendBoundTo(MultiCBuilder builder, Bound bound, QueryOptions options); |
| } |