    001/*
    002 * Copyright (c) 2007-2017 Xplenty, 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.FlowElement;
    024import cascading.flow.planner.PlannerContext;
    025import cascading.flow.planner.graph.ElementGraph;
    026
    027/**
    028 *
    029 */
    030public class NotElementExpression extends ElementExpression
    031  {
    032  public static ElementExpression not( ElementExpression elementMatcher )
    033    {
    034    return new NotElementExpression( elementMatcher );
    035    }
    036
    037  ElementExpression delegate;
    038
    039  public NotElementExpression( ElementExpression delegate )
    040    {
    041    this.delegate = delegate;
    042    }
    043
    044  @Override
    045  public boolean applies( PlannerContext plannerContext, ElementGraph elementGraph, FlowElement flowElement )
    046    {
    047    return !delegate.applies( plannerContext, elementGraph, flowElement );
    048    }
    049
    050  @Override
    051  public ElementCapture getCapture()
    052    {
    053    return delegate.getCapture();
    054    }
    055
    056  @Override
    057  public String toString()
    058    {
    059    final StringBuilder sb = new StringBuilder( "Not{" );
    060    sb.append( delegate );
    061    sb.append( '}' );
    062    return sb.toString();
    063    }
    064  }