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.dsl.ReportParserParser.FunctionContext;
  import com.bstek.ureport.dsl.ReportParserParser.FunctionParameterContext;
  import com.bstek.ureport.dsl.ReportParserParser.ItemContext;
  import com.bstek.ureport.dsl.ReportParserParser.UnitContext;
  import com.bstek.ureport.expression.ExpressionUtils;
  import com.bstek.ureport.expression.model.expr.BaseExpression;
  import com.bstek.ureport.expression.model.expr.FunctionExpression;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author
   * @since 2016年12月26日
   */
  public class FunctionExpressionBuilder extends BaseExpressionBuilder {
  	@Override
  	public BaseExpression build(UnitContext unitContext) {
  		FunctionContext ctx=unitContext.function();
  		FunctionExpression expr=new FunctionExpression();
  		expr.setExpr(ctx.getText());
  		expr.setName(ctx.Identifier().getText());
  		FunctionParameterContext functionParameterContext=ctx.functionParameter();
  		if(functionParameterContext!=null){
  			List<BaseExpression> exprList=new ArrayList<BaseExpression>();
  			List<ItemContext> itemContexts=functionParameterContext.item();
  			if(itemContexts!=null){
  				for(int i=0;i<itemContexts.size();i++){
  					ItemContext itemContext=itemContexts.get(i);
  					BaseExpression baseExpr=ExpressionUtils.getExprVisitor().parseItemContext(itemContext);
  					exprList.add(baseExpr);
  				}
  			}
  			expr.setExpressions(exprList);
  		}
  		return expr;
  	}
  
  	@Override
  	public boolean support(UnitContext unitContext) {
  		return unitContext.function()!=null;
  	}
  }
  