ComparatorExpressionSQL.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it).
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
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package org.openspcoop2.generic_project.expression.impl.sql;

import java.util.List;
import java.util.Map;

import org.openspcoop2.generic_project.beans.IField;
import org.openspcoop2.generic_project.exception.ExpressionException;
import org.openspcoop2.generic_project.expression.impl.Comparator;
import org.openspcoop2.generic_project.expression.impl.ComparatorExpressionImpl;
import org.openspcoop2.generic_project.expression.impl.formatter.IObjectFormatter;
import org.openspcoop2.generic_project.utils.IDGenerator;
import org.openspcoop2.utils.sql.ISQLQueryObject;

/**
 * ComparatorExpressionSQL
 * 
 * @author Poli Andrea (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class ComparatorExpressionSQL extends ComparatorExpressionImpl implements ISQLExpression {

    private ISQLFieldConverter sqlFieldConverter;
    
    public ComparatorExpressionSQL(ISQLFieldConverter sqlFieldConverter, IObjectFormatter objectFormatter,
            IField field, Object object, Comparator comparator) {
        super(objectFormatter, field, object, comparator);
        this.sqlFieldConverter = sqlFieldConverter;
    }
    
    private String toSqlEngine(SQLMode mode,List<Object> oggettiPreparedStatement,Map<String, Object> oggettiJPA)throws ExpressionException{
        StringBuilder bf = new StringBuilder();
        if(isNot()){
            bf.append("( NOT ");
        }
        bf.append("( ");
        bf.append(this.sqlFieldConverter.toColumn(this.getField(),true));
        bf.append(" ");
        bf.append(this.getComparator().getOperatore(this.sqlFieldConverter));
        if(this.getObject()!=null){
            bf.append(" ");
            switch (mode) {
            case STANDARD:
                try{
                    bf.append(super.getObjectFormatter().toSQLString(this.getObject()));
                }catch(Exception e){
                    return "ERROR: "+e.getMessage();
                }
                break;
            case PREPARED_STATEMENT:
                bf.append("?");
                if(oggettiPreparedStatement!=null) {
                    oggettiPreparedStatement.add(this.getObject());
                }
                break;
            case JPA:
                String id = IDGenerator.getUniqueID(this.getField());
                bf.append(":"+id);
                if(oggettiJPA!=null) {
                    oggettiJPA.put(id, this.getObject());
                }
                break;
            }
        }
        bf.append(" )");
        if(isNot()){
            bf.append(" )");
        }
        return bf.toString();
    }

    private void toSqlEngine(ISQLQueryObject sqlQueryObject,SQLMode mode,List<Object> oggettiPreparedStatement,Map<String, Object> oggettiJPA)throws ExpressionException{
        try{
            String s = toSqlEngine(mode, oggettiPreparedStatement, oggettiJPA);
            s = s.substring(1,s.length()-2);
            sqlQueryObject.addWhereCondition(s);
        }catch(Exception e){
            throw new ExpressionException(e);
        }
    }

    @Override
    public String toSql() throws ExpressionException {
        return toSqlEngine(SQLMode.STANDARD, null, null);
    }

    @Override
    public String toSqlPreparedStatement(List<Object> oggetti)
            throws ExpressionException {
        return toSqlEngine(SQLMode.PREPARED_STATEMENT, oggetti, null);
    }

    @Override
    public String toSqlJPA(Map<String, Object> oggetti)
            throws ExpressionException {
        return toSqlEngine(SQLMode.JPA, null, oggetti);
    }
    
    @Override
    public void toSql(ISQLQueryObject sqlQueryObject) throws ExpressionException {
        toSqlEngine(sqlQueryObject,SQLMode.STANDARD, null, null);
    }

    @Override
    public void toSqlPreparedStatement(ISQLQueryObject sqlQueryObject,List<Object> oggetti)
            throws ExpressionException {
        toSqlEngine(sqlQueryObject,SQLMode.PREPARED_STATEMENT, oggetti, null);
    }

    @Override
    public void toSqlJPA(ISQLQueryObject sqlQueryObject,Map<String, Object> oggetti)
            throws ExpressionException {
        toSqlEngine(sqlQueryObject,SQLMode.JPA, null, oggetti);
    }
}