package org.codehaus.modello.model;

/*
 * Copyright (c) 2004, Codehaus.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/**
 * Default values for a model, that can be overrided with <code>defaults</code> element of the model descriptor.
 *
 * @author <a href="mailto:evenisse@codehaus.org">Emmanuel Venisse</a>
 */
public class ModelDefault {
    public static final String CHECK_DEPRECATION = "checkDeprecation";

    public static final String CHECK_DEPRECATION_VALUE = "false";

    public static final String PACKAGE = "package";

    public static final String PACKAGE_VALUE = "model";

    public static final String LIST = "java.util.List";

    public static final String LIST_VALUE = "new java.util.ArrayList<?>()";

    public static final String MAP = "java.util.Map";

    public static final String MAP_VALUE = "new java.util.HashMap()";

    public static final String PROPERTIES = "java.util.Properties";

    public static final String PROPERTIES_VALUE = "new java.util.Properties()";

    public static final String SET = "java.util.Set";

    public static final String SET_VALUE = "new java.util.HashSet<?>()";

    public static final String STRICT_XML_ATTRIBUTES = "strictXmlAttributes";

    public static final String STRICT_XML_ATTRIBUTES_VALUE = "true";

    private String key;

    private String value;

    public static ModelDefault getDefault(String key) throws ModelValidationException {
        validateKey(key);

        ModelDefault modelDefault = new ModelDefault();

        modelDefault.setKey(key);

        if (CHECK_DEPRECATION.equalsIgnoreCase(key)) {
            modelDefault.setValue(CHECK_DEPRECATION_VALUE);
        } else if (PACKAGE.equalsIgnoreCase(key)) {
            modelDefault.setValue(PACKAGE_VALUE);
        } else if (LIST.equalsIgnoreCase(key)) {
            modelDefault.setValue(LIST_VALUE);
        } else if (MAP.equalsIgnoreCase(key)) {
            modelDefault.setValue(MAP_VALUE);
        } else if (PROPERTIES.equalsIgnoreCase(key)) {
            modelDefault.setValue(PROPERTIES_VALUE);
        } else if (SET.equalsIgnoreCase(key)) {
            modelDefault.setValue(SET_VALUE);
        } else if (STRICT_XML_ATTRIBUTES.equalsIgnoreCase(key)) {
            modelDefault.setValue(STRICT_XML_ATTRIBUTES_VALUE);
        }

        return modelDefault;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getKey() {
        return key;
    }

    public void setValue(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }

    public boolean getBoolean() {
        return Boolean.valueOf(value).booleanValue();
    }

    public void validateElement() throws ModelValidationException {
        if (isEmpty(key)) {
            throw new ModelValidationException("You must define the key of default element.");
        }

        if (isEmpty(value)) {
            throw new ModelValidationException("You must define the value of default element.");
        }

        validateKey(key);
    }

    private static void validateKey(String key) throws ModelValidationException {
        if (!SET.equalsIgnoreCase(key)
                && !LIST.equalsIgnoreCase(key)
                && !MAP.equalsIgnoreCase(key)
                && !PROPERTIES.equalsIgnoreCase(key)
                && !CHECK_DEPRECATION.equalsIgnoreCase(key)
                && !PACKAGE.equalsIgnoreCase(key)
                && !STRICT_XML_ATTRIBUTES.equalsIgnoreCase(key)) {
            throw new ModelValidationException("The key of default element must be ' " + SET + "', '" + LIST + "', '"
                    + MAP + "', '" + PROPERTIES + "', '" + CHECK_DEPRECATION + "', '" + PACKAGE + "' or '"
                    + STRICT_XML_ATTRIBUTES + "', was '" + key + "'.");
        }
    }

    protected boolean isEmpty(String string) {
        return string == null || string.trim().length() == 0;
    }
}
