com.github.fge.jsonschema.core.keyword.syntax.checkers.draftv4.RequiredSyntaxChecker.java Source code

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Here is the source code for com.github.fge.jsonschema.core.keyword.syntax.checkers.draftv4.RequiredSyntaxChecker.java

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/*
 * Copyright (c) 2014, Francis Galiegue (fgaliegue@gmail.com)
 *
 * This software is dual-licensed under:
 *
 * - the Lesser General Public License (LGPL) version 3.0 or, at your option, any
 *   later version;
 * - the Apache Software License (ASL) version 2.0.
 *
 * The text of this file and of both licenses is available at the root of this
 * project or, if you have the jar distribution, in directory META-INF/, under
 * the names LGPL-3.0.txt and ASL-2.0.txt respectively.
 *
 * Direct link to the sources:
 *
 * - LGPL 3.0: https://www.gnu.org/licenses/lgpl-3.0.txt
 * - ASL 2.0: http://www.apache.org/licenses/LICENSE-2.0.txt
 */

package com.github.fge.jsonschema.core.keyword.syntax.checkers.draftv4;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jackson.JsonNumEquals;
import com.github.fge.jackson.NodeType;
import com.github.fge.jackson.jsonpointer.JsonPointer;
import com.github.fge.jsonschema.core.exceptions.ProcessingException;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.core.keyword.syntax.checkers.AbstractSyntaxChecker;
import com.github.fge.jsonschema.core.keyword.syntax.checkers.SyntaxChecker;
import com.github.fge.jsonschema.core.tree.SchemaTree;
import com.github.fge.msgsimple.bundle.MessageBundle;
import com.google.common.base.Equivalence;
import com.google.common.collect.Sets;

import java.util.Collection;
import java.util.EnumSet;
import java.util.Set;

/**
 * Syntax checker for draft v4's {@code required} keyword
 */
public final class RequiredSyntaxChecker extends AbstractSyntaxChecker {
    private static final Equivalence<JsonNode> EQUIVALENCE = JsonNumEquals.getInstance();

    private static final SyntaxChecker INSTANCE = new RequiredSyntaxChecker();

    public static SyntaxChecker getInstance() {
        return INSTANCE;
    }

    private RequiredSyntaxChecker() {
        super("required", NodeType.ARRAY);
    }

    @Override
    protected void checkValue(final Collection<JsonPointer> pointers, final MessageBundle bundle,
            final ProcessingReport report, final SchemaTree tree) throws ProcessingException {
        final JsonNode node = getNode(tree);
        final int size = node.size();

        if (size == 0) {
            report.error(newMsg(tree, bundle, "common.array.empty"));
            return;
        }

        final Set<Equivalence.Wrapper<JsonNode>> set = Sets.newHashSet();

        boolean uniqueElements = true;
        JsonNode element;
        NodeType type;

        for (int index = 0; index < size; index++) {
            element = node.get(index);
            uniqueElements = set.add(EQUIVALENCE.wrap(element));
            type = NodeType.getNodeType(element);
            if (type != NodeType.STRING)
                report.error(newMsg(tree, bundle, "common.array.element.incorrectType").putArgument("index", index)
                        .putArgument("expected", EnumSet.of(NodeType.STRING)).putArgument("found", type));
        }

        if (!uniqueElements)
            report.error(newMsg(tree, bundle, "common.array.duplicateElements"));
    }
}