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A Java implementation of the JSON Schema specification
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/*
 * Copyright (c) 2012, Francis Galiegue 
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Lesser GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * Lesser GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package org.eel.kitchen.jsonschema.metaschema;

import com.fasterxml.jackson.databind.JsonNode;
import org.eel.kitchen.jsonschema.main.JsonSchemaException;
import org.eel.kitchen.jsonschema.ref.JsonRef;
import org.eel.kitchen.jsonschema.util.JsonLoader;

import java.io.IOException;
import java.net.URI;

/**
 * Enumeration of the builtin schemas
 */
public enum BuiltinSchema
{
    /**
     * The default core schema
     */
    DEFAULT_CORE("http://json-schema.org/schema#", "/draftv3/schema",
        "default core schema"),
    /**
     * Draft v3 core schema
     */
    DRAFTV3_CORE("http://json-schema.org/draft-03/schema#", "/draftv3/schema",
        "draft v3 core schema"),
    /**
     * Draft v4 core schema
     */
    DRAFTV4_CORE("http://json-schema.org/draft-04/schema#", "/draftv4/schema",
        "draft v4 core schema"),
    /**
     * Draft v3 LDO (Link Description Object) schema
     */
    DRAFTV3_LINKS("http://json-schema.org/draft-03/links#", "/draftv3/links",
        "draft v3 link description object (LDO) schema"),
    /**
     * Draft v3 hyper-schema
     */
    DRAFTV3_HYPERSCHEMA("http://json-schema.org/draft-03/hyper-schema#",
        "/draftv3/hyper-schema", "draft v3 hyper schema"),
    /**
     * Default hyper-schema
     */
    DEFAULT_HYPERSCHEMA("http://json-schema.org/hyper-schema#",
        "/draftv3/hyper-schema", "default hyper schema");

    private final JsonRef locator;
    private final JsonNode rawSchema;
    private final String desc;

    BuiltinSchema(final String uri, final String resource, final String desc)
    {
        try {
            locator = JsonRef.fromString(uri);
            rawSchema = JsonLoader.fromResource(resource);
        } catch (JsonSchemaException e) {
            throw new ExceptionInInitializerError(e);
        } catch (IOException e) {
            throw new ExceptionInInitializerError(e);
        }

        this.desc = desc;
    }

    /**
     * Get the locator for this schema
     *
     * @return the locator as a URI
     */
    public URI getURI()
    {
        return locator.toURI();
    }

    /**
     * Get the raw JSON document for that schema
     *
     * @return the schema as a {@link JsonNode}
     */
    public JsonNode getRawSchema()
    {
        return rawSchema;
    }

    @Override
    public String toString()
    {
        return desc + " (" + locator + ')';
    }
}