LikeExpressionImpl.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;

import org.openspcoop2.generic_project.beans.ComplexField;
import org.openspcoop2.generic_project.beans.IField;
import org.openspcoop2.generic_project.expression.LikeMode;
import org.openspcoop2.generic_project.expression.impl.formatter.IObjectFormatter;
import org.openspcoop2.utils.LoggerWrapperFactory;
import org.openspcoop2.utils.TipiDatabase;
import org.openspcoop2.utils.sql.EscapeSQLPattern;
import org.openspcoop2.utils.sql.ISQLQueryObject;
import org.openspcoop2.utils.sql.SQLObjectFactory;

/**
 * LikeExpressionImpl
 * 
 * @author Poli Andrea (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class LikeExpressionImpl extends AbstractCommonFieldValueBaseExpressionImpl {

    private LikeMode mode;
    private boolean caseInsensitive;
    
    public LikeExpressionImpl(IObjectFormatter objectFormatter,IField field,String value,LikeMode mode,boolean caseInsensitive){
        super(objectFormatter, field, value);
        this.mode = mode;
        this.caseInsensitive = caseInsensitive;
    }
    
    public LikeMode getMode() {
        return this.mode;
    }

    public void setMode(LikeMode mode) {
        this.mode = mode;
    }

    public boolean isCaseInsensitive() {
        return this.caseInsensitive;
    }

    public void setCaseInsensitive(boolean caseInsensitive) {
        this.caseInsensitive = caseInsensitive;
    }

    @Override
    public String toString(){
        StringBuilder bf = new StringBuilder();
        if(isNot()){
            bf.append("( NOT ");
        }
        bf.append("( ");
        if(this.caseInsensitive){
            bf.append("lower(");
        }
        if(this.field instanceof ComplexField){
            ComplexField cf = (ComplexField) this.field;
            if(cf.getFather()!=null){
                bf.append(cf.getFather().getFieldName());
            }else{
                bf.append(this.field.getClassName());
            }
        }else{
            bf.append(this.field.getClassName());
        }
        bf.append(".");
        bf.append(this.field.getFieldName());
        if(this.caseInsensitive){
            bf.append(")");
        }
        bf.append(" like '");
        
        String likeValue = this.value;
        
        // escape
        String escapeClausole = "";
        try{
            ISQLQueryObject sqlQueryObjectForEscape = SQLObjectFactory.createSQLQueryObject(TipiDatabase.POSTGRESQL); // lo uso come default per produrre la stringa
            EscapeSQLPattern escapePattern = sqlQueryObjectForEscape.escapePatternValue(likeValue);
            if(escapePattern.isUseEscapeClausole()){
                escapeClausole = " ESCAPE '"+escapePattern.getEscapeClausole()+"'";
            }
            likeValue = escapePattern.getEscapeValue();
        }catch(Exception e){
            LoggerWrapperFactory.getLogger(LikeExpressionImpl.class).error(e.getMessage(),e);
        }
        
        String likeParam = getLikeParam(likeValue);
        bf.append(likeParam);
        bf.append("'");
        bf.append(escapeClausole);
        bf.append(" )");
        if(isNot()){
            bf.append(" )");
        }
        return bf.toString();
    }
    
    private String getLikeParam(String likeValue) {
        String likeParam = null;
        switch (this.mode) {
        case EXACT:
            if(this.caseInsensitive){
                likeParam = likeValue.toLowerCase();
            }else{
                likeParam = likeValue;
            }
            break;
        case ANYWHERE:
            if(this.caseInsensitive){
                likeParam = "%"+likeValue.toLowerCase()+"%";
            }else{
                likeParam = "%"+likeValue+"%";
            }
            break;
        case END:
            if(this.caseInsensitive){
                likeParam = "%"+likeValue.toLowerCase();
            }else{
                likeParam = "%"+likeValue;
            }
            break;
        case START:
            if(this.caseInsensitive){
                likeParam = likeValue.toLowerCase()+"%";
            }else{
                likeParam = likeValue+"%";
            }
            break;
        default:
            break;
        }
        return likeParam;
    }

    

}