org.eel.kitchen.jsonschema.keyword.ExtendsKeywordValidator.java Source code

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Here is the source code for org.eel.kitchen.jsonschema.keyword.ExtendsKeywordValidator.java

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/*
 * Copyright (c) 2012, Francis Galiegue <fgaliegue@gmail.com>
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

package org.eel.kitchen.jsonschema.keyword;

import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.collect.ImmutableSet;
import org.eel.kitchen.jsonschema.report.ValidationReport;
import org.eel.kitchen.jsonschema.util.NodeType;
import org.eel.kitchen.jsonschema.validator.JsonValidator;
import org.eel.kitchen.jsonschema.validator.ValidationContext;

import java.util.Set;

/**
 * Validator for the {@code extends} keyword
 *
 * <p>This only really triggers schema validations.</p>
 */
public final class ExtendsKeywordValidator extends KeywordValidator {
    private final Set<JsonNode> schemas;

    public ExtendsKeywordValidator(final JsonNode schema) {
        super("extends", NodeType.values());
        final JsonNode node = schema.get(keyword);
        final ImmutableSet.Builder<JsonNode> builder = new ImmutableSet.Builder<JsonNode>();

        /*
         * Again, the fact that syntax validation has ensured our schema's
         * correctness helps greatly: the keyword value is either an object
         * or an array of objects.
         *
         * If this is an array, just cycle through its elements and stuff
         * them in our schema set. It should be noted that the draft DOES NOT
         * require that elements in the array must be unique,
         * but we swallow duplicates this way.
         */

        if (node.isObject())
            builder.add(node);
        else
            builder.addAll(node);

        schemas = builder.build();
    }

    @Override
    public void validate(final ValidationContext context, final ValidationReport report, final JsonNode instance) {
        JsonValidator validator;

        for (final JsonNode schema : schemas) {
            validator = context.newValidator(schema);
            validator.validate(context, report, instance);
        }
    }

    @Override
    public String toString() {
        return keyword + ": " + schemas.size() + " schema(s)";
    }
}