001/* 002 * Copyright (c) 2007-2015 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 021package cascading.flow.planner.iso.expression; 022 023import cascading.flow.planner.PlannerContext; 024import cascading.flow.planner.Scope; 025import cascading.flow.planner.graph.ElementGraph; 026 027/** 028 * 029 */ 030public class OrdinalScopeExpression extends ScopeExpression 031 { 032 public static final OrdinalScopeExpression ORDINAL_ZERO = new OrdinalScopeExpression( 0 ); 033 public static final OrdinalScopeExpression NOT_ORDINAL_ZERO = new OrdinalScopeExpression( true, 0 ); 034 035 boolean not = false; 036 int ordinal = 0; 037 038 public OrdinalScopeExpression( int ordinal ) 039 { 040 this.ordinal = ordinal; 041 } 042 043 public OrdinalScopeExpression( Applies applies, int ordinal ) 044 { 045 super( applies ); 046 this.ordinal = ordinal; 047 } 048 049 public OrdinalScopeExpression( boolean not, int ordinal ) 050 { 051 this.not = not; 052 this.ordinal = ordinal; 053 } 054 055 public OrdinalScopeExpression( Applies applies, boolean not, int ordinal ) 056 { 057 super( applies ); 058 this.not = not; 059 this.ordinal = ordinal; 060 } 061 062 @Override 063 public boolean applies( PlannerContext plannerContext, ElementGraph elementGraph, Scope scope ) 064 { 065 boolean equals = scope.getOrdinal().equals( ordinal ); 066 067 if( !not ) 068 return equals; 069 else 070 return !equals; 071 } 072 }