gistfile1.txt

//Adapter class for b2b_QueryBuilder
public with sharing class QueryBuilder {
    private b2b_QueryBuilder builder;
    private Schema.SObjectType sobjectType;

    private String conditionLogic;
    private List<String> fields = new List<String>();
    private List<String> conditionList = new List<String>();
    private List<String> orderByList = new List<String>();
    
    public QueryBuilder(Schema.SObjectType sobjectType){
        this.builder = new b2b_QueryBuilder().withObjectName(sobjectType.getDescribe().getname());
        this.sobjectType = sobjectType;
    }

    public QueryBuilder addFields(List<String> fields){
        this.fields.addAll(fields);
        this.builder = this.builder.addFields(fields);
        return this;
    }

    public QueryBuilder addFields(Set<String> fields){
        return this.addFields(new List<String>(fields));
    }

    public QueryBuilder setFields(Set<String> fields){
        this.fields = new List<String>(fields);
        this.builder = this.builder.withFields(new Set<String>(fields));
        return this;
    }

    public QueryBuilder setFields(List<String> fields){
       return this.setFields(new Set<String>(fields));
    }

    public QueryBuilder addCondition(String condition){
        this.conditionList.add(condition);
        this.builder = this.builder.withConditions(getFormattedConditionsWithConditionLogicApplied());
        return this;
    }

    public QueryBuilder setConditionLogic(String conditionLogic){
        this.conditionLogic = conditionLogic;
        this.builder = this.builder.withConditions(getFormattedConditionsWithConditionLogicApplied());
        return this;
    }

    public QueryBuilder setGroupBy(String groupBy){
        this.builder = this.builder.withGroupBy(groupBy);
        return this;
    }
    
    public QueryBuilder addOrderBy(String orderBy, String orderDirection){
        this.orderByList.add(String.format('{0} {1}', new List<String>{orderBy, orderDirection}));
        this.builder = this.builder.withOrders(this.orderByList);
        return this;
    }

    public QueryBuilder setLimit(Integer lim){
        this.builder = this.builder.withRowLimit(lim);
        return this;
    }

    public QueryBuilder setOffset(Integer offset){
        this.builder = this.builder.withOffset(offset);
        return this;
    }

    public override String toString(){
        return this.builder.build();
    }

    private String getFormattedConditionsWithConditionLogicApplied(){
        String formattedConditions;
        if(conditionLogic != null){
            formattedConditions = String.format(conditionLogic, conditionList);
        }
        else{
            formattedConditions = String.join(conditionList, ' AND ');
        }
        return formattedConditions;
    }
    /**qb.addChildRelation(qb) to transform if needed
    QueryBuilder qb = new QueryBuilder(Account.SObjectType);
    String query = qb.setFields(new List<String>{'Id'})
                    .addFields(new List<String>{'Name', 'Industry'})
                    .addCondition('Name != \'test\'')
                    .addCondition('Name != \'test2\'')
                    .setConditionLogic('({0} OR {1})')
                    .addOrderBy('Name', 'ASC')
                    .addOrderBy('Industry', 'DESC')
                    .setLimit(5)
                    .setOffset(2)
                    .toString();
    System.debug(qb);
    */
}