/* * 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.twilmes.sql.gremlin.rel; import org.apache.calcite.plan.*; import org.apache.calcite.rel.RelNode; import org.apache.calcite.rel.core.TableScan; import org.apache.calcite.rel.type.RelDataType; import org.apache.calcite.rel.type.RelDataTypeFactory; import org.apache.calcite.rel.type.RelDataTypeField; import java.util.Arrays; import java.util.List; /** * Created by twilmes on 9/25/15. */ public class GremlinTableScan extends TableScan implements GremlinRel { private final GremlinTable gremlinTable; private final int[] fields; protected GremlinTableScan(RelOptCluster cluster, RelTraitSet traitSet, RelOptTable table, GremlinTable gremlinTable, int[] fields) { super(cluster, traitSet, table); this.gremlinTable = gremlinTable; this.fields = fields; assert gremlinTable != null; assert getConvention() == CONVENTION; } public GremlinTable getGremlinTable() { return gremlinTable; } @Override public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) { assert inputs.isEmpty(); return this; } @Override public RelDataType deriveRowType() { final List<RelDataTypeField> fieldList = table.getRowType().getFieldList(); final RelDataTypeFactory.FieldInfoBuilder builder = getCluster().getTypeFactory().builder(); for (int field : fields) { builder.add(fieldList.get(field)); } return builder.build(); } @Override public void register(RelOptPlanner planner) { planner.addRule(GremlinToEnumerableConverterRule.INSTANCE); for (RelOptRule rule : GremlinRules.RULES) { planner.addRule(rule); } } @Override public void implement(Implementor implementor) { implementor.gremlinTable = gremlinTable; implementor.table = table; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; GremlinTableScan that = (GremlinTableScan) o; if (!Arrays.equals(fields, that.fields)) return false; if (!gremlinTable.equals(that.gremlinTable)) return false; return true; } @Override public int hashCode() { int result = gremlinTable.hashCode(); result = 31 * result + Arrays.hashCode(fields); return result; } }