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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2013 Saxonica Limited.
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

package net.sf.saxon.lib;


/**
* This class contains constants and static methods to manipulate the validation
* property of a type.
*/

public final class Validation {

    /**
     * Code indicating that the value of a validation request was invalid
     */

    public static final int INVALID = -1;

    /**
     * Code for strict validation
     */

    public static final int STRICT = 1;

    /**
     * Code for lax validation
     */

    public static final int LAX = 2;

    /**
     * Code corresponding to the XSLT option validation=preserve, which indicates
     * that existing type annotations are to be preserved but no new validation is performed.
     */

    public static final int PRESERVE = 3;

    /**
     * Code corresponding to the XSLT option validation=strip, which indicates
     * that existing type annotations are to be removed and no new validation is performed.
     */

    public static final int STRIP = 4;

   /**
     * Synonym for {@link #STRIP}, corresponding to XQuery usage
     */

    public static final int SKIP = 4;   // synonym provided for the XQuery API

    /**
     * Code indicating that no specific validation options were requested
     */

    public static final int DEFAULT = 0;

    /**
     * Code indicating that validation against a named type was requested
     */

    public static final int BY_TYPE = 8;

    /**
     * This class is never instantiated
     */

    private Validation() {
    }

    /**
     * Get the integer validation code corresponding to a given string
     * @param value one of "strict", "lax", "preserve", or "strip"
     * @return the corresponding code {@link #STRICT}, {@link #LAX},
     * {@link #PRESERVE}, or {@link #STRIP}
     */

    public static int getCode(String value) {
        if (value.equals("strict")) {
            return STRICT;
        } else if (value.equals("lax")) {
            return LAX;
        } else if (value.equals("preserve")) {
            return PRESERVE;
        } else if (value.equals("strip")) {
            return STRIP;
        } else {
            return INVALID;
        }
    }

    /**
     * Get a string representation of a validation code
     * @param value one of the validation codes defined in this class
     * @return one of the strings "strict", "lax", "preserve", "skip" (sic), or "invalid"
     */

    /*@NotNull*/ public static String toString(int value) {
        switch(value) {
            case STRICT: return "strict";
            case LAX: return "lax";
            case PRESERVE: return "preserve";
            case STRIP: return "skip";  // for XQuery
            case BY_TYPE: return "by type";
            default: return "invalid";
        }
    }
}