| /* |
| * 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.exec; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Type; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.apache.hadoop.hive.common.classification.InterfaceAudience; |
| import org.apache.hadoop.hive.common.classification.InterfaceStability; |
| import org.apache.hadoop.hive.ql.parse.SemanticException; |
| import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils; |
| import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo; |
| |
| /** |
| * exception class, thrown when udf argument have something wrong. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class UDFArgumentException extends SemanticException { |
| |
| public UDFArgumentException() { |
| super(); |
| } |
| |
| public UDFArgumentException(String message) { |
| super(message); |
| } |
| |
| public UDFArgumentException(Throwable cause) { |
| super(cause); |
| } |
| |
| |
| /** |
| * Constructor. |
| * |
| * @param funcClass |
| * The UDF or UDAF class. |
| * @param argTypeInfos |
| * The list of argument types that lead to an ambiguity. |
| * @param methods |
| * All potential matches. |
| */ |
| public UDFArgumentException(String message, |
| Class<?> funcClass, |
| List<TypeInfo> argTypeInfos, |
| List<Method> methods) { |
| super(getMessage(message, methods)); |
| this.funcClass = funcClass; |
| this.argTypeInfos = argTypeInfos; |
| this.methods = methods; |
| } |
| //HIVE-23896 remove unnecessary parameter |
| private static String getMessage(String message, List<Method> methods) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(message); |
| if (methods != null) { |
| // Sort the methods before omitting them. |
| sortMethods(methods); |
| sb.append(". Possible choices: "); |
| for (Method m: methods) { |
| Type[] types = m.getGenericParameterTypes(); |
| sb.append("_FUNC_("); |
| for (int t = 0; t < types.length; t++) { |
| if (t > 0) { |
| sb.append(", "); |
| } |
| sb.append(ObjectInspectorUtils.getTypeNameFromJavaClass(types[t])); |
| } |
| sb.append(") "); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| private static void sortMethods(List<Method> methods) { |
| Collections.sort( methods, new Comparator<Method>(){ |
| |
| @Override |
| public int compare(Method m1, Method m2) { |
| int result = m1.getName().compareTo(m2.getName()); |
| if (result != 0) |
| return result; |
| Type[] types1 = m1.getGenericParameterTypes(); |
| Type[] types2 = m2.getGenericParameterTypes(); |
| for (int i = 0; i < types1.length && i < types2.length; i++) { |
| String type1 = ObjectInspectorUtils.getTypeNameFromJavaClass(types1[i]); |
| String type2 = ObjectInspectorUtils.getTypeNameFromJavaClass(types2[i]); |
| if ((result = type1.compareTo(type2)) != 0) |
| return result; |
| } |
| return types1.length - types2.length; |
| } |
| |
| }); |
| } |
| |
| /** |
| * The UDF or UDAF class that has the ambiguity. |
| */ |
| private Class<?> funcClass; |
| |
| /** |
| * The list of parameter types. |
| */ |
| private List<TypeInfo> argTypeInfos; |
| |
| /** |
| * The list of matched methods. |
| */ |
| private List<Method> methods; |
| |
| public Class<?> getFunctionClass() { |
| return funcClass; |
| } |
| |
| public List<TypeInfo> getArgTypeList() { |
| return argTypeInfos; |
| } |
| |
| public List<Method> getMethods() { |
| return methods; |
| } |
| |
| } |