com.b2international.snowowl.server.console.CommandLineAuthenticator.java Source code

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Here is the source code for com.b2international.snowowl.server.console.CommandLineAuthenticator.java

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/*
 * Copyright 2011-2016 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.b2international.snowowl.server.console;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.eclipse.osgi.framework.console.CommandInterpreter;

import com.b2international.commons.StringUtils;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;

/**
 * Authentication support for OSGi console.
 *
 */
public class CommandLineAuthenticator {

    private String username;

    public boolean authenticate(final CommandInterpreter interpreter) {

        Preconditions.checkNotNull(interpreter);
        interpreter.print("Impersonate operation as: ");

        username = readUsername();

        if (StringUtils.isEmpty(username)) {
            interpreter.println("Impersonating user name should be specified.");
            return false;
        } else {

            //XXX removed due to missing configuration for JAAS when using LDAP
            //         if (null == ApplicationContext.getInstance().getService(IUserManager.class).getUser(username)) {
            //            interpreter.println("Cannot impersonate non-existing user '" + username + "'.");
            //            return false;
            //         }

            return true;
        }

    }

    /**
     * Returns with the user name if the authentication was successful, otherwise returns with {@code null}.
     * @return the user ID.
     */
    public String getUsername() {
        return username;
    }

    private String readUsername() {

        BufferedReader reader = null;
        String reply = null;
        try {
            reader = new BufferedReader(new InputStreamReader(System.in));
            reply = reader.readLine();
        } catch (final IOException e) {
            System.out.println("Error while reading username.");
        } finally {
            //intentionally not closed
        }

        return Strings.nullToEmpty(reply);
    }

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return Strings.nullToEmpty(username);
    }

}