Level 38, Lesson 06, Home 02

Connection.java

package com.javarush.test.level38.lesson06.home02;

public interface Connection {
    void connect() throws WrongDataException, ConnectionException;
    void write(Object data) throws WrongDataException, ConnectionException;
    Object read() throws WrongDataException, ConnectionException;
    void disconnect() throws WrongDataException, ConnectionException;
}

ConnectionException.java

package com.javarush.test.level38.lesson06.home02;

public class ConnectionException extends Exception {
    public ConnectionException() {
        super();
    }
    public ConnectionException(String message) {
        super(message);
    }
}

ConnectionMock.java

package com.javarush.test.level38.lesson06.home02;

public class ConnectionMock implements Connection {
    @Override
    public void connect() throws WrongDataException, ConnectionException {
    }

    @Override
    public void write(Object data) throws WrongDataException, ConnectionException {
    }

    @Override
    public Object read() throws WrongDataException, ConnectionException {
        return null;
    }

    @Override
    public void disconnect() throws WrongDataException, ConnectionException {

    }
}

Solution.java

package com.javarush.test.level38.lesson06.home02;

/* Улучшения в Java 7 (multiple exceptions)
Перепиши реализации методов класса Solution.
Используй нововведения, касающиеся обработки исключений, которые были добавлены в Java 7.
*/

public class Solution {
    private final Connection connection;

    public Solution() throws SolutionException {
        try {
            connection = new ConnectionMock();
            connection.connect();
        }
        catch (WrongDataException | ConnectionException e) {
            throw new SolutionException(e.getClass().getSimpleName() + ": " + e.getMessage());
        }
    }

    public void write(Object data) throws SolutionException {
        try {
            connection.write(data);
        }
        catch (WrongDataException | ConnectionException e) {
            throw new SolutionException(e.getClass().getSimpleName() + ": " + e.getMessage());
        }
    }

    public Object read() throws SolutionException {
        try {
            return connection.read();
        }
        catch (WrongDataException | ConnectionException e) {
            throw new SolutionException(e.getClass().getSimpleName() + ": " + e.getMessage());
        }
    }

    public void disconnect() throws SolutionException {
        try {
            connection.disconnect();
        }
        catch (WrongDataException | ConnectionException e) {
            throw new SolutionException(e.getClass().getSimpleName() + ": " + e.getMessage());
        }
    }
}

SolutionException.java

package com.javarush.test.level38.lesson06.home02;

public class SolutionException extends Exception {
    public SolutionException() {
        super();
    }
    public SolutionException(String message) {
        super(message);
    }
}

WrongDataException.java

package com.javarush.test.level38.lesson06.home02;

public class WrongDataException extends Exception {
    public WrongDataException() {
        super();
    }
    public WrongDataException(String message) {
        super(message);
    }
}