SqlExprEvaluator_UrlDecode.java

package org.aksw.sparqlify.core.sql.expr.evaluation;

import org.aksw.commons.util.strings.StringUtils;
import org.aksw.sparqlify.algebra.sql.exprs2.S_Constant;
import org.aksw.sparqlify.algebra.sql.exprs2.SqlExpr;
import org.aksw.sparqlify.core.TypeToken;
import org.aksw.sparqlify.core.cast.SqlValue;

public class SqlExprEvaluator_UrlDecode
	extends SqlExprEvaluator1
{
	@Override
	public SqlExpr eval(SqlExpr a) {
		SqlValue value = a.asConstant().getValue();
		String str = "" + value.getValue();
	
		String val;
		try {
			val = StringUtils.urlDecode(str);
		} catch (Exception e){
			return S_Constant.TYPE_ERROR;
		}
		
		S_Constant result = S_Constant.create(new SqlValue(TypeToken.String, val));
		
		
		return result;
	}
}