/tags/release-0.1-rc2/hive/external/ql/src/java/org/apache/hadoop/hive/ql/plan/ExprNodeDesc.java
Java | 86 lines | 45 code | 16 blank | 25 comment | 2 complexity | cc39426bd9c69e74f4ef957f97e3ca09 MD5 | raw file
Possible License(s): Apache-2.0, BSD-3-Clause, JSON, CPL-1.0
- /**
- * 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.hadoop.hive.ql.plan;
- import java.io.Serializable;
- import java.util.List;
- import org.apache.hadoop.hive.ql.lib.Node;
- import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
- /**
- * ExprNodeDesc.
- *
- */
- public abstract class ExprNodeDesc implements Serializable, Node {
- private static final long serialVersionUID = 1L;
- TypeInfo typeInfo;
- public ExprNodeDesc() {
- }
- public ExprNodeDesc(TypeInfo typeInfo) {
- this.typeInfo = typeInfo;
- if (typeInfo == null) {
- throw new RuntimeException("typeInfo cannot be null!");
- }
- }
- @Override
- public abstract ExprNodeDesc clone();
- // Cant use equals because the walker depends on them being object equal
- // The default graph walker processes a node after its kids have been
- // processed. That comparison needs
- // object equality - isSame means that the objects are semantically equal.
- public abstract boolean isSame(Object o);
- public TypeInfo getTypeInfo() {
- return typeInfo;
- }
- public void setTypeInfo(TypeInfo typeInfo) {
- this.typeInfo = typeInfo;
- }
- public String getExprString() {
- assert (false);
- return null;
- }
- @Explain(displayName = "type")
- public String getTypeString() {
- return typeInfo.getTypeName();
- }
- public List<String> getCols() {
- return null;
- }
- @Override
- public List<ExprNodeDesc> getChildren() {
- return null;
- }
- @Override
- public String getName() {
- return this.getClass().getName();
- }
- }