001 /* 002 * Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021 package cascading.tuple; 022 023 /** 024 * Class FieldsResolverException is thrown when selectorFields cannot 025 * select from the sourceFields. 026 */ 027 public class FieldsResolverException extends TupleException 028 { 029 /** Field sourceFields */ 030 private final Fields sourceFields; 031 /** Field selectorFields */ 032 private final Fields selectorFields; 033 034 /** 035 * Constructor FieldsResolverException creates a new FieldsResolverException instance. 036 * 037 * @param sourceFields of type Fields 038 * @param selectorFields of type Fields 039 */ 040 public FieldsResolverException( Fields sourceFields, Fields selectorFields ) 041 { 042 super( createMessage( sourceFields, selectorFields ) ); 043 044 this.sourceFields = sourceFields; 045 this.selectorFields = selectorFields; 046 } 047 048 /** 049 * Method getSourceFields returns the sourceFields of this FieldsResolverException object. 050 * 051 * @return the sourceFields (type Fields) of this FieldsResolverException object. 052 */ 053 public Fields getSourceFields() 054 { 055 return sourceFields; 056 } 057 058 /** 059 * Method getSelectorFields returns the selectorFields of this FieldsResolverException object. 060 * 061 * @return the selectorFields (type Fields) of this FieldsResolverException object. 062 */ 063 public Fields getSelectorFields() 064 { 065 return selectorFields; 066 } 067 068 private static String createMessage( Fields sourceFields, Fields selectorFields ) 069 { 070 return "could not select fields: " + selectorFields.printVerbose() + ", from: " + sourceFields.printVerbose(); 071 } 072 }