com.github.fge.jsonschema.old.syntax.SyntaxValidator Maven / Gradle / Ivy

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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 com.github.fge.jsonschema.old.syntax;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jsonschema.metaschema.MetaSchema;
import com.github.fge.jsonschema.report.Domain;
import com.github.fge.jsonschema.report.Message;
import com.github.fge.jsonschema.util.NodeType;
import com.google.common.collect.Sets;

import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Schema syntax validator
 *
 * Note that schemas are not validated "in depth", only the first level of
 * keywords will be validated. This is by design (for now) since recursing
 * through schemas is not as simple as it sounds, we cannot just blindly
 * recurse through object instances (consider {@code enum}).
 */
public final class SyntaxValidator
{
    /**
     * List of registered checkers
     */
    private final Map checkers;

    public SyntaxValidator(final MetaSchema metaSchema)
    {
        checkers = metaSchema.getSyntaxCheckers();
    }

    /**
     * Validate one schema
     *
     * @param messages the list of messages to fill in the event of a failure
     * @param schema the schema to analyze
     */
    public void validate(final List messages, final JsonNode schema)
    {
        if (!schema.isObject()) {
            final Message message = Domain.SYNTAX.newMessage().setKeyword("N/A")
                .setMessage("illegal JSON Schema: not an object")
                .addInfo("found", NodeType.getNodeType(schema)).build();
            messages.add(message);
            return;
        }

        final Set keywords = Sets.newHashSet(schema.fieldNames());

        keywords.retainAll(checkers.keySet());

        SyntaxChecker checker;

        for (final String keyword: keywords) {
            checker = checkers.get(keyword);
            checker.checkSyntax(this, messages, schema);
        }
    }
}