/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package com.sun.org.apache.xalan.internal;

import com.sun.org.apache.xalan.internal.utils.SecuritySupport;

/**
 * Commonly used constants.
 *
 * @author Huizhe Wang, Oracle
 *
 * @version $Id: Constants.java,v 1.14 2011-06-07 04:39:40 joehw Exp $
 */
public final class XalanConstants {

    //
    // Constants
    //
    // Oracle Feature:
    /**
     * <p>Use Service Mechanism</p>
     *
     * <ul>
     *   <li>
         * {@code true} instruct an object to use service mechanism to
         * find a service implementation. This is the default behavior.
         *   </li>
         *   <li>
         * {@code false} instruct an object to skip service mechanism and
         * use the default implementation for that service.
     *   </li>
     * </ul>
    */

    public static final String ORACLE_FEATURE_SERVICE_MECHANISM = "http://www.oracle.com/feature/use-service-mechanism";

    /** Oracle JAXP property prefix ("http://www.oracle.com/xml/jaxp/properties/"). */
    public static final String ORACLE_JAXP_PROPERTY_PREFIX =
        "http://www.oracle.com/xml/jaxp/properties/";

    //System Properties corresponding to ACCESS_EXTERNAL_* properties
    public static final String SP_ACCESS_EXTERNAL_STYLESHEET = "javax.xml.accessExternalStylesheet";
    public static final String SP_ACCESS_EXTERNAL_DTD = "javax.xml.accessExternalDTD";


    //all access keyword
    public static final String ACCESS_EXTERNAL_ALL = "all";

    /**
     * Default value when FEATURE_SECURE_PROCESSING (FSP) is set to true
     */
    public static final String EXTERNAL_ACCESS_DEFAULT_FSP = "";

    /**
     * FEATURE_SECURE_PROCESSING (FSP) is false by default
     */
    public static final String EXTERNAL_ACCESS_DEFAULT = ACCESS_EXTERNAL_ALL;

    public static final String XML_SECURITY_PROPERTY_MANAGER =
            ORACLE_JAXP_PROPERTY_PREFIX + "xmlSecurityPropertyManager";

    /**
     * Check if we're in jdk8 or above
     */
    public static final boolean IS_JDK8_OR_ABOVE = isJavaVersionAtLeast(8);

    /*
     * Check the version of the current JDK against that specified in the
     * parameter
     *
     * There is a proposal to change the java version string to:
     * MAJOR.MINOR.FU.CPU.PSU-BUILDNUMBER_BUGIDNUMBER_OPTIONAL
     * This method would work with both the current format and that proposed
     *
     * @param compareTo a JDK version to be compared to
     * @return true if the current version is the same or above that represented
     * by the parameter
     */
    public static boolean isJavaVersionAtLeast(int compareTo) {
        String javaVersion = SecuritySupport.getSystemProperty("java.version");
        String versions[] = javaVersion.split("\\.", 3);
        if (Integer.parseInt(versions[0]) >= compareTo ||
            Integer.parseInt(versions[1]) >= compareTo) {
            return true;
        }
        return false;
    }
} // class Constants