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This is a Java client library for Pusher, targeted at core Java and Android.

There is a newer version: 2.4.4

package com.pusher.client.connection;

import java.util.logging.Logger;

/**
 * Represents a change in connection state.
 */
public class ConnectionStateChange {

    private static final Logger log = Logger.getLogger(ConnectionStateChange.class.getName());
    private final ConnectionState previousState;
    private final ConnectionState currentState;

    /**
     * Used within the library to create a connection state change. Not be used
     * used as part of the API.
     *
     * @param previousState The previous connection state
     * @param currentState The current connection state
     */
    public ConnectionStateChange(final ConnectionState previousState, final ConnectionState currentState) {

        if (previousState == currentState) {
	    log.fine("Attempted to create an connection state update where both previous and current state are: "
		     + currentState);
        }

        this.previousState = previousState;
        this.currentState = currentState;
    }

    /**
     * The previous connections state. The state the connection has transitioned
     * from.
     *
     * @return The previous connection state
     */
    public ConnectionState getPreviousState() {
        return previousState;
    }

    /**
     * The current connection state. The state the connection has transitioned
     * to.
     *
     * @return The current connection state
     */
    public ConnectionState getCurrentState() {
        return currentState;
    }

    @Override
    public int hashCode() {
        return previousState.hashCode() + currentState.hashCode();
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj != null && obj instanceof ConnectionStateChange) {
            final ConnectionStateChange other = (ConnectionStateChange)obj;
            return currentState == other.currentState && previousState == other.previousState;
        }

        return false;
    }
}