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Diffstat (limited to 'sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnDescriptor.java')
-rw-r--r-- | sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnDescriptor.java | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnDescriptor.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnDescriptor.java new file mode 100644 index 0000000000..f0bbf14693 --- /dev/null +++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/ColumnDescriptor.java @@ -0,0 +1,99 @@ +/** + * 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.hive.service.cli; + +import org.apache.hadoop.hive.metastore.api.FieldSchema; +import org.apache.hive.service.cli.thrift.TColumnDesc; + + +/** + * ColumnDescriptor. + * + */ +public class ColumnDescriptor { + private final String name; + private final String comment; + private final TypeDescriptor type; + // ordinal position of this column in the schema + private final int position; + + public ColumnDescriptor(String name, String comment, TypeDescriptor type, int position) { + this.name = name; + this.comment = comment; + this.type = type; + this.position = position; + } + + public ColumnDescriptor(TColumnDesc tColumnDesc) { + name = tColumnDesc.getColumnName(); + comment = tColumnDesc.getComment(); + type = new TypeDescriptor(tColumnDesc.getTypeDesc()); + position = tColumnDesc.getPosition(); + } + + public ColumnDescriptor(FieldSchema column, int position) { + name = column.getName(); + comment = column.getComment(); + type = new TypeDescriptor(column.getType()); + this.position = position; + } + + public static ColumnDescriptor newPrimitiveColumnDescriptor(String name, String comment, Type type, int position) { + // Current usage looks like it's only for metadata columns, but if that changes then + // this method may need to require a type qualifiers aruments. + return new ColumnDescriptor(name, comment, new TypeDescriptor(type), position); + } + + public String getName() { + return name; + } + + public String getComment() { + return comment; + } + + public TypeDescriptor getTypeDescriptor() { + return type; + } + + public int getOrdinalPosition() { + return position; + } + + public TColumnDesc toTColumnDesc() { + TColumnDesc tColumnDesc = new TColumnDesc(); + tColumnDesc.setColumnName(name); + tColumnDesc.setComment(comment); + tColumnDesc.setTypeDesc(type.toTTypeDesc()); + tColumnDesc.setPosition(position); + return tColumnDesc; + } + + public Type getType() { + return type.getType(); + } + + public boolean isPrimitive() { + return type.getType().isPrimitiveType(); + } + + public String getTypeName() { + return type.getTypeName(); + } +} |