| /** |
| * 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.drill.exec.record; |
| |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import com.google.common.collect.Lists; |
| |
| |
| public class BatchSchema implements Iterable<MaterializedField> { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(BatchSchema.class); |
| final SelectionVectorMode selectionVectorMode; |
| private final List<MaterializedField> fields; |
| |
| BatchSchema(SelectionVectorMode selectionVector, List<MaterializedField> fields) { |
| this.fields = fields; |
| this.selectionVectorMode = selectionVector; |
| } |
| |
| public static SchemaBuilder newBuilder() { |
| return new SchemaBuilder(); |
| } |
| |
| public int getFieldCount() { |
| return fields.size(); |
| } |
| |
| public MaterializedField getColumn(int index) { |
| if (index < 0 || index >= fields.size()) { |
| return null; |
| } |
| return fields.get(index); |
| } |
| |
| @Override |
| public Iterator<MaterializedField> iterator() { |
| return fields.iterator(); |
| } |
| |
| public SelectionVectorMode getSelectionVectorMode() { |
| return selectionVectorMode; |
| } |
| |
| @Override |
| public BatchSchema clone() { |
| List<MaterializedField> newFields = Lists.newArrayList(); |
| newFields.addAll(fields); |
| return new BatchSchema(selectionVectorMode, newFields); |
| } |
| |
| @Override |
| public String toString() { |
| return "BatchSchema [fields=" + fields + ", selectionVector=" + selectionVectorMode + "]"; |
| } |
| |
| public static enum SelectionVectorMode { |
| NONE(-1, false), TWO_BYTE(2, true), FOUR_BYTE(4, true); |
| |
| public boolean hasSelectionVector; |
| public final int size; |
| SelectionVectorMode(int size, boolean hasSelectionVector) { |
| this.size = size; |
| } |
| |
| public static SelectionVectorMode[] DEFAULT = {NONE}; |
| public static SelectionVectorMode[] NONE_AND_TWO = {NONE, TWO_BYTE}; |
| public static SelectionVectorMode[] NONE_AND_FOUR = {NONE, FOUR_BYTE}; |
| public static SelectionVectorMode[] ALL = {NONE, TWO_BYTE, FOUR_BYTE}; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + ((fields == null) ? 0 : fields.hashCode()); |
| result = prime * result + ((selectionVectorMode == null) ? 0 : selectionVectorMode.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| BatchSchema other = (BatchSchema) obj; |
| if (fields == null) { |
| if (other.fields != null) { |
| return false; |
| } |
| } else if (!fields.equals(other.fields)) { |
| return false; |
| } |
| if (selectionVectorMode != other.selectionVectorMode) { |
| return false; |
| } |
| return true; |
| } |
| |
| } |