content: /*******************************************************************************
   * Copyright 2017 Bstek
   *
   * Licensed 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 com.bstek.ureport.expression.model.expr.set;
  
  import com.bstek.ureport.Utils;
  import com.bstek.ureport.build.Context;
  import com.bstek.ureport.exception.ReportComputeException;
  import com.bstek.ureport.expression.model.data.ExpressionData;
  import com.bstek.ureport.expression.model.data.ObjectExpressionData;
  import com.bstek.ureport.expression.model.data.ObjectListExpressionData;
  import com.bstek.ureport.expression.model.expr.BaseExpression;
  import com.bstek.ureport.model.Cell;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author
   * @since 1月1日
   */
  public class FromToExpression extends BaseExpression {
  	private static final long serialVersionUID = -3250140935488901894L;
  	private BaseExpression fromExpression;
  	private BaseExpression toExpression;
  
  	public FromToExpression(BaseExpression fromExpression,BaseExpression toExpression) {
  		this.fromExpression = fromExpression;
  		this.toExpression = toExpression;
  	}
  
  	@Override
  	protected ExpressionData<?> compute(Cell cell,Cell currentCell, Context context) {
  		Object fromData=fromExpression.execute(cell,currentCell, context);
  		Object toData=toExpression.execute(cell,currentCell, context);
  		int from=convertFloatData(fromData),to=convertFloatData(toData);
  		List<Integer> list=new ArrayList<Integer>();
  		for(int i=from;i<=to;i++){
  			list.add(i);
  		}
  		return new ObjectListExpressionData(list);
  	}
  
  	private int convertFloatData(Object data){
  		if(data instanceof ObjectExpressionData){
  			Object obj=((ObjectExpressionData)data).getData();
  			return Utils.toBigDecimal(obj).intValue();
  		}else{
  			throw new ReportComputeException("Can not convert ["+data+"] to integer.");
  		}
  	}
  }
  