MPESA Plain Old Java Object on the HTTP POST Payload

Mpesa.java

package com.zawadipay.mpesa;

import java.util.Date;
import java.util.HashMap;

public class Mpesa {
    private HashMap<String,String> requestMetadata = new HashMap<String,String>(){ { put("merchantId", "merchantId"); } };
    private String sourceType="";
    private String source="";
    private String provider ="";
    private String destinationType ="";
    private String description="";
    private String providerChannel="";
    private String direction="";
    private String transactionFee="";
    private String providerRefId="";
    private HashMap<String,String> providerMetadata = new HashMap<String, String>() {{ put("merchantId","merchantId");} };
    private String origin="";
    private String status="";
    private String productName="";
    private String category="";
    private String transactionDate="";
    private String destination="";
    private String value="";
    private String transactionId="";
    private Date createdAt = new Date();
    public Mpesa() {}
    public Mpesa(HashMap<String, String> requestMetadata, String sourceType, String source, String provider, String destinationType, String description, String providerChannel, String direction, String transactionFee, String providerRefId, HashMap<String, String> providerMetadata, String origin, String status, String productName, String category, String transactionDate, String destination, String value, String transactionId, Date createdAt) {
        this.requestMetadata = requestMetadata;
        this.sourceType = sourceType;
        this.source = source;
        this.provider = provider;
        this.destinationType = destinationType;
        this.description = description;
        this.providerChannel = providerChannel;
        this.direction = direction;
        this.transactionFee = transactionFee;
        this.providerRefId = providerRefId;
        this.providerMetadata = providerMetadata;
        this.origin = origin;
        this.status = status;
        this.productName = productName;
        this.category = category;
        this.transactionDate = transactionDate;
        this.destination = destination;
        this.value = value;
        this.transactionId = transactionId;
        this.createdAt = createdAt;
    }

    public HashMap<String, String> getRequestMetadata() {
        return requestMetadata;
    }

    public String getSourceType() {
        return sourceType;
    }

    public String getSource() {
        return source;
    }

    public String getProvider() {
        return provider;
    }

    public String getDestinationType() {
        return destinationType;
    }

    public String getDescription() {
        return description;
    }

    public String getProviderChannel() {
        return providerChannel;
    }

    public String getDirection() {
        return direction;
    }

    public String getTransactionFee() {
        return transactionFee;
    }

    public String getProviderRefId() {
        return providerRefId;
    }

    public HashMap<String, String> getProviderMetadata() {
        return providerMetadata;
    }

    public String getOrigin() {
        return origin;
    }

    public String getStatus() {
        return status;
    }

    public String getProductName() {
        return productName;
    }

    public String getCategory() {
        return category;
    }

    public String getTransactionDate() {
        return transactionDate;
    }

    public String getDestination() {
        return destination;
    }

    public String getValue() {
        return value;
    }

    public String getTransactionId() {
        return transactionId;
    }

    public Date getCreatedAt() {
        return createdAt;
    }
}