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/*
 * ====================
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2008-2009 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of the Common Development
 * and Distribution License("CDDL") (the "License").  You may not use this file
 * except in compliance with the License.
 *
 * You can obtain a copy of the License at
 * http://opensource.org/licenses/cddl1.php
 * See the License for the specific language governing permissions and limitations
 * under the License.
 *
 * When distributing the Covered Code, include this CDDL Header Notice in each file
 * and include the License file at http://opensource.org/licenses/cddl1.php.
 * If applicable, add the following below this CDDL Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 * ====================
 * Portions Copyrighted 2011 ConnId.
 */
package net.tirasa.connid.commons.db;

import java.util.Properties;
import org.identityconnectors.common.StringUtil;
import org.identityconnectors.framework.common.objects.ConnectorMessages;

/**
 * Common utility methods regarding JNDI.
 */
public abstract class JNDIUtil {

    private JNDIUtil() {
        //empty
    }

    public static final String INVALID_JNDI_ENTRY = "invalid.jndi.entry";

    /**
     * Parses arrays of string as entries of properties. Each entry must be in form
     *
     * key=value. We use = as only separator and treat only first occurrence of =.
     *
     * Blank entries are skipped.
     *
     * @param entries could be null or size = 0
     *
     * @param messages the error messages from the configuration resource bundle
     *
     * @return properties of given entries
     *
     * @throws IllegalArgumentException when there is any error in format of any entry
     */
    public static Properties arrayToProperties(final String[] entries, final ConnectorMessages messages) {
        Properties result = new Properties();
        if (entries != null) {
            for (String entry : entries) {
                if (StringUtil.isNotBlank(entry)) {
                    int firstEq = entry.indexOf('=');
                    if (firstEq == -1) {
                        throwFormatException(messages, entry, "Invalid value in JNDI entry");
                    }
                    if (firstEq == 0) {
                        throwFormatException(messages, entry, "First character cannot be =");
                    }
                    final String key = entry.substring(0, firstEq);
                    final String value = firstEq == entry.length() - 1 ? null : entry.substring(firstEq + 1);
                    result.put(key, value);
                }
            }
        }
        return result;
    }

    private static void throwFormatException(
            final ConnectorMessages messages, final String entry, final String defaultMsg) {
        String msg;
        if (messages == null) {
            msg = defaultMsg + " : " + entry;
        } else {
            msg = messages.format(INVALID_JNDI_ENTRY, INVALID_JNDI_ENTRY + " : " + entry, entry);
        }
        throw new IllegalArgumentException(msg);
    }
}