| /* |
| * 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.schema; |
| |
| import org.apache.drill.common.types.TypeProtos.MajorType; |
| |
| import com.google.common.base.MoreObjects; |
| import com.google.common.base.Strings; |
| |
| import java.util.Objects; |
| |
| public abstract class Field { |
| final String prefixFieldName; |
| MajorType fieldType; |
| RecordSchema schema; |
| RecordSchema parentSchema; |
| boolean read; |
| |
| public Field(RecordSchema parentSchema, MajorType type, String prefixFieldName) { |
| fieldType = type; |
| this.prefixFieldName = prefixFieldName; |
| this.parentSchema = parentSchema; |
| } |
| |
| public abstract String getFieldName(); |
| |
| public String getFullFieldName() { |
| String fieldName = getFieldName(); |
| if(Strings.isNullOrEmpty(prefixFieldName)) { |
| return fieldName; |
| } else if(Strings.isNullOrEmpty(fieldName)) { |
| return prefixFieldName; |
| } else { |
| return prefixFieldName + "." + getFieldName(); |
| } |
| } |
| |
| public void setRead(boolean read) { |
| this.read = read; |
| } |
| |
| protected abstract MoreObjects.ToStringHelper addAttributesToHelper(MoreObjects.ToStringHelper helper); |
| |
| MoreObjects.ToStringHelper getAttributesStringHelper() { |
| return MoreObjects.toStringHelper(this).add("type", fieldType) |
| .add("fullFieldName", getFullFieldName()) |
| .add("schema", schema == null ? null : schema.toSchemaString()).omitNullValues(); |
| } |
| |
| @Override |
| public String toString() { |
| return addAttributesToHelper(getAttributesStringHelper()).toString(); |
| } |
| |
| public RecordSchema getAssignedSchema() { |
| return schema; |
| } |
| |
| public void assignSchemaIfNull(RecordSchema newSchema) { |
| if (!hasSchema()) { |
| schema = newSchema; |
| } |
| } |
| |
| public boolean isRead() { |
| return read; |
| } |
| |
| public boolean hasSchema() { |
| return schema != null; |
| } |
| |
| public MajorType getFieldType() { |
| return fieldType; |
| } |
| |
| public void setFieldType(MajorType fieldType) { |
| this.fieldType = fieldType; |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| if (this == that) { |
| return true; |
| } else if (that == null || getClass() != that.getClass()) { |
| return false; |
| } |
| Field thatField = (Field)that; |
| return Objects.equals(getFullFieldName(), thatField.getFullFieldName()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return getFullFieldName().hashCode(); |
| } |
| } |