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.parse.builder;
  
  import com.bstek.ureport.definition.Order;
  import com.bstek.ureport.definition.value.AggregateType;
  import com.bstek.ureport.dsl.ReportParserParser.ConditionsContext;
  import com.bstek.ureport.dsl.ReportParserParser.DatasetContext;
  import com.bstek.ureport.dsl.ReportParserParser.UnitContext;
  import com.bstek.ureport.expression.model.condition.BaseCondition;
  import com.bstek.ureport.expression.model.expr.BaseExpression;
  import com.bstek.ureport.expression.model.expr.dataset.DatasetExpression;
  import org.antlr.v4.runtime.tree.TerminalNode;
  
  /**
   * @author
   * @since 2016年12月26日
   */
  public class DatasetExpressionBuilder extends BaseExpressionBuilder {
  	@Override
  	public BaseExpression build(UnitContext unitContext) {
  		DatasetContext context=(DatasetContext)unitContext.dataset();
  		DatasetExpression expr=new DatasetExpression();
  		expr.setExpr(context.getText());
  		expr.setDatasetName(context.Identifier().getText());
  		expr.setAggregate(AggregateType.valueOf(context.aggregate().getText()));
  		if(context.property()!=null){
  			expr.setProperty(context.property().getText());
  		}
  		ConditionsContext conditionsContext=context.conditions();
  		if(conditionsContext!=null){
  			BaseCondition condition=buildConditions(conditionsContext);
  			expr.setCondition(condition);
  		}
  		TerminalNode orderNode=context.ORDER();
  		if(orderNode!=null){
  			expr.setOrder(Order.valueOf(orderNode.getText()));
  		}
  		return expr;
  	}
  
  	@Override
  	public boolean support(UnitContext unitContext) {
  		return unitContext.dataset()!=null;
  	}
  }
  