AbcAccountsAPI.java

package com.designpatterns.adapter;

public interface AbcAccountsAPI {// This was old API

	public String getAccountName();

	public String getDescription();

	public double getDebitAmount();

	public double getCreditAmount();

	public int getYear();

	public int getMonth();

	public int getDate();

	public void setAccountName(String accountName);

	public void setDescription(String description);

	public void setDebitAmount(double debitAmount);

	public void setCreditAmount(double creditAmount);

	public void setYear(int year);

	public void setMonth(int month);

	public void setDate(int date);
}

AbcAccountsAPIImpl.java

package com.designpatterns.adapter;

public class AbcAccountsAPIImpl implements AbcAccountsAPI {

	private String accountName;
	private String description;
	private double debitAmount;
	private double creditAmount;
	private int year;
	private int month;
	private int date;

	@Override
	public String getAccountName() {
		return accountName;
	}

	@Override
	public void setAccountName(String accountName) {
		this.accountName = accountName;
	}

	@Override
	public String getDescription() {
		return description;
	}

	@Override
	public void setDescription(String description) {
		this.description = description;
	}

	@Override
	public double getDebitAmount() {
		return debitAmount;
	}

	@Override
	public void setDebitAmount(double debitAmount) {
		this.debitAmount = debitAmount;
	}

	@Override
	public double getCreditAmount() {
		return creditAmount;
	}

	@Override
	public void setCreditAmount(double creditAmount) {
		this.creditAmount = creditAmount;
	}

	@Override
	public int getYear() {
		return year;
	}

	@Override
	public void setYear(int year) {
		this.year = year;
	}

	@Override
	public int getMonth() {
		return month;
	}

	@Override
	public void setMonth(int month) {
		this.month = month;
	}

	@Override
	public int getDate() {
		return date;
	}

	@Override
	public void setDate(int date) {
		this.date = date;
	}
}

AbcToXyzAdapter.java

package com.designpatterns.adapter;

public class AbcToXyzAdapter implements XyzAccountsAPI {//This is the Abc to Xyz adapter

	private String ledgerAccountName;
	private String shortDescription;
	private double debitValue;
	private double creditValue;
	private String transactionDate;

	private final AbcAccountsAPI abcAccountsAPI;// set variable as final, 
												// since its required to be instantiated in constructor

	public AbcToXyzAdapter(AbcAccountsAPI abcAccountsAPI) {
		this.abcAccountsAPI = abcAccountsAPI;
		adapterDataMapping();
	}

	private void adapterDataMapping() {
		setLedgerAccountName(abcAccountsAPI.getAccountName());
		setShortDescription(abcAccountsAPI.getDescription());
		setDebitValue(abcAccountsAPI.getDebitAmount());
		setCreditValue(abcAccountsAPI.getCreditAmount());
		setTransactionDate(abcAccountsAPI.getYear() + "-" + abcAccountsAPI.getMonth() + "-" + abcAccountsAPI.getDate());
	}

	@Override
	public String getLedgerAccountName() {
		return ledgerAccountName;
	}

	@Override
	public void setLedgerAccountName(String ledgerAccountName) {
		this.ledgerAccountName = ledgerAccountName;
	}

	@Override
	public String getShortDescription() {
		return shortDescription;
	}

	@Override
	public void setShortDescription(String shortDescription) {
		this.shortDescription = shortDescription;
	}

	@Override
	public double getDebitValue() {
		return debitValue;
	}

	@Override
	public void setDebitValue(double debitValue) {
		this.debitValue = debitValue;
	}

	@Override
	public double getCreditValue() {
		return creditValue;
	}

	@Override
	public void setCreditValue(double creditValue) {
		this.creditValue = creditValue;
	}

	@Override
	public String getTransactionDate() {
		return transactionDate;
	}

	@Override
	public void setTransactionDate(String transactionDate) {
		this.transactionDate = transactionDate;
	}
}

AdapterDemoApplication.java

package com.designpatterns.adapter;

public class AdapterDemoApplication {// This is main application to test the output
	public static void main(String[] args) {

		AbcAccountsAPI abcAccountsAPI = new AbcAccountsAPIImpl();
		abcAccountsAPI.setAccountName("3316561_FIXED_ASSETS");
		abcAccountsAPI.setDescription("Account for Assets");
		abcAccountsAPI.setDebitAmount(150000);
		abcAccountsAPI.setCreditAmount(320550);
		abcAccountsAPI.setYear(2022);
		abcAccountsAPI.setMonth(12);
		abcAccountsAPI.setDate(31);

		XyzAccountsAPI xyzAccountsAPI = new AbcToXyzAdapter(abcAccountsAPI);
		testAdapterData(xyzAccountsAPI);
	}

	private static void testAdapterData(XyzAccountsAPI xyzAccountsAPI) {
		System.out.println(xyzAccountsAPI.getLedgerAccountName());
		System.out.println(xyzAccountsAPI.getShortDescription());
		System.out.println(xyzAccountsAPI.getCreditValue());
		System.out.println(xyzAccountsAPI.getDebitValue());
		System.out.println(xyzAccountsAPI.getTransactionDate());
	}
}

XyzAccountsAPI.java

package com.designpatterns.adapter;

public interface XyzAccountsAPI {// This is new API

	public String getLedgerAccountName();

	public String getShortDescription();

	public double getDebitValue();

	public double getCreditValue();

	public String getTransactionDate();

	public void setLedgerAccountName(String ledgerAccountName);

	public void setShortDescription(String shortDescription);

	public void setDebitValue(double debitValue);

	public void setCreditValue(double creditValue);

	public void setTransactionDate(String transactionDate);
}