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A client library for Dropbox's HTTP-based "Core API".

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package com.dropbox.core;

import com.dropbox.core.DbxSessionStore;

import javax.servlet.http.HttpSession;

/**
 * A {@link DbxSessionStore} implementation that stores the value using the standard
 * {@link HttpSession} interface from the Java Servlet API.
 *
 * Example:
 *  * DbxWebAuth getDbxWebAuth(HttpServletRequest request)
 * {
 *     HttpSession session = request.getSession(true);
 *     String key = "dropbox-auth-csrf-token";
 *     DbxSessionStore csrfStore = new StandardSessionStore(session, key);
 *     return new DbxWebAuth(..., csrfStore);
 * }
 * 
 */
public final class DbxStandardSessionStore implements DbxSessionStore
{
    public final String key;
    public final HttpSession session;

    public DbxStandardSessionStore(String key, HttpSession session)
    {
        this.key = key;
        this.session = session;
    }

    @Override
    public String get()
    {
        Object v = session.getAttribute(key);
        if (v instanceof String) return (String) v;
        return null;
    }

    @Override
    public void set(String value)
    {
        session.setAttribute(key, value);
    }

    @Override
    public void clear()
    {
        session.removeAttribute(key);
    }
}