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.function.math;
  
  import com.bstek.ureport.Utils;
  import com.bstek.ureport.build.BindData;
  import com.bstek.ureport.exception.ReportComputeException;
  import com.bstek.ureport.expression.function.Function;
  import com.bstek.ureport.expression.model.data.BindDataListExpressionData;
  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 java.math.BigDecimal;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author
   * @since 1月22日
   */
  public abstract class MathFunction implements Function {
  	protected List<BigDecimal> buildDataList(List<ExpressionData<?>> dataList){
  		if(dataList==null || dataList.size()==0){
  			throw new ReportComputeException("Function ["+name()+"] need a lot of data parameter.");
  		}
  		List<BigDecimal> list=new ArrayList<BigDecimal>();
  		for(ExpressionData<?> data:dataList){
  			if(data instanceof ObjectListExpressionData){
  				ObjectListExpressionData objList=(ObjectListExpressionData)data;
  				for(Object obj:objList.getData()){
  					BigDecimal bigData=Utils.toBigDecimal(obj);
  					if(bigData!=null){
  						list.add(bigData);
  					}
  				}
  			}else if(data instanceof ObjectExpressionData){
  				ObjectExpressionData objData=(ObjectExpressionData)data;
  				BigDecimal bigData=Utils.toBigDecimal(objData.getData());
  				if(bigData!=null){
  					list.add(bigData);
  				}
  			}else if(data instanceof BindDataListExpressionData){
  				BindDataListExpressionData bindDataListData=(BindDataListExpressionData)data;
  				for(BindData bindData:bindDataListData.getData()){
  					BigDecimal bigData=Utils.toBigDecimal(bindData.getValue());
  					if(bigData!=null){
  						list.add(bigData);
  					}
  				}
  			}
  		}
  		return list;
  	}
  
  	protected BigDecimal buildBigDecimal(List<ExpressionData<?>> dataList) {
  		if(dataList==null || dataList.size()==0){
  			throw new ReportComputeException("Function ["+name()+"] need a data of number parameter.");
  		}
  		BigDecimal number=null;
  		ExpressionData<?> data=dataList.get(0);
  		if(data instanceof ObjectListExpressionData){
  			ObjectListExpressionData listData=(ObjectListExpressionData)data;
  			List<?> list=listData.getData();
  			if(list==null || list.size()!=1){
  				throw new ReportComputeException("Function ["+name()+"] need a data of number parameter.");
  			}
  			Object obj=list.get(0);
  			if(obj==null){
  				throw new ReportComputeException("Function ["+name()+"] parameter can not be null.");
  			}
  			number=Utils.toBigDecimal(obj);
  		}else if(data instanceof ObjectExpressionData){
  			ObjectExpressionData objData=(ObjectExpressionData)data;
  			Object obj=objData.getData();
  			if(obj==null){
  				throw new ReportComputeException("Function ["+name()+"] parameter can not be null.");
  			}
  			number=Utils.toBigDecimal(obj);
  		}else{
  			throw new ReportComputeException("Function ["+name()+"] need a data of number parameter.");
  		}
  		return number;
  	}
  }
  