Hi Team,

I want to restrict the below add product button based on the value of year. can any one help me on this. below is the apex code for same.

public string addingProduct {get; set;}
    
    public PageReference addProduct() {
        addingProduct='.';
        return null;
    }
    
    public PageReference cancelAddProduct() {
        addingProduct = null;
        return null;
    }       
    
    public transient string selectedProductIDs {get; set;} // no need to keep between postbacks
    
    public PageReference productsSelected() {
        addingProduct = null;
        
        string[] spIDs = (selectedProductIDs==null) ? new string[]{} : selectedProductIDs.split(',');
        Set<ID> pIDs = new Set<ID>();
        
        for (string s : spIDs)
            pIDs.add(s);
        
        Map<ID, Product_Shipper__c> pp = readProducts(pIDs);
        List<DSP_Product__c> records = new List<DSP_Product__c>();
        List<DataRecord> drdr = new List<DataRecord>();
        
        for (ID pid : pp.keySet())
        {
            Product_Shipper__c p = pp.get(pid);
            DataRecord dr = new DataRecord(p, this);
            dr.fix();
            
            dr.Forecast.Product_Price__c = p.Price__c;
            dr.LE.Product_Price__c = p.Price__c;
            dr.Actual.Product_Price__c = p.Price__c;
            
            records.add(dr.Forecast);
            records.add(dr.LE);
            records.add(dr.Actual);
            
            drdr.add(dr);
            
        }
        
        try {
            insert records;
           // for (DataRecord dr : drdr)
           //     dataRecords.add(dr);
           reloadRecords();    
        }
        catch (Exception e) {
         ApexPages.addMessages(e);
        }
        
        dsp.invalidate();
                
        return null;        
    }

    public ID[] existingProducts {
        get {
            if (dataRecords==null) return new ID[]{};
            
            ID[] rr = new ID[]{};
            
            for (DataRecord r : dataRecords.items) {
                if (r.Forecast!=null)
                    rr.add(r.Forecast.Product_Shipper__c);
            }
            return rr;
        }
    }