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;
  
  import com.bstek.ureport.build.Context;
  import com.bstek.ureport.expression.model.Condition;
  import com.bstek.ureport.expression.model.Expression;
  import com.bstek.ureport.expression.model.data.ExpressionData;
  import com.bstek.ureport.model.Cell;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author
   * @since 2016年11月18日
   */
  public abstract class BaseExpression implements Expression{
  	private static final long serialVersionUID = 3853234856946931008L;
  	protected String expr;
  
  	@Override
  	public final ExpressionData<?> execute(Cell cell,Cell currentCell, Context context) {
  		ExpressionData<?>  data=compute(cell,currentCell,context);
  		return data;
  	}
  
  	protected abstract ExpressionData<?> compute(Cell cell,Cell currentCell, Context context);
  
  	protected List<Cell> filterCells(Cell cell,Context context,Condition condition,List<Cell> targetCells) {
  		if(condition==null){
  			return targetCells;
  		}
  		List<Cell> list=new ArrayList<Cell>();
  		for(Cell targetCell:targetCells){
  			boolean conditionResult=true;
  			List<Object> dataList=targetCell.getBindData();
  			if(dataList==null){
  				conditionResult=false;
  			}else{
  				for(Object obj:dataList){
  					boolean result=condition.filter(cell,targetCell, obj, context);
  					if(!result){
  						conditionResult=false;
  						break;
  					}
  				}
  			}
  			if(!conditionResult){
  				continue;
  			}
  			list.add(targetCell);
  		}
  		return list;
  	}
  
  	public void setExpr(String expr) {
  		this.expr = expr;
  	}
  	public String getExpr() {
  		return expr;
  	}
  }
  