com.github.fge.jsonschema.processors.validation.ArraySchemaSelector.java Source code

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Here is the source code for com.github.fge.jsonschema.processors.validation.ArraySchemaSelector.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.processors.validation;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.fge.jackson.jsonpointer.JsonPointer;
import com.google.common.collect.ImmutableList;

import java.util.Collections;

/**
 * JSON Schema subschema selector for array instances
 *
 * <p>Its role is to select which subschemas apply to a given array index of an
 * instance, given a digest built by {@link ArraySchemaDigester}.</p>
 *
 * <p>It may happen that no schemas apply at all (in which case the document at
 * the given array index will always validate successfully).</p>
 */
public final class ArraySchemaSelector {
    private static final JsonPointer ITEMS = JsonPointer.of("items");
    private static final JsonPointer ADDITIONAL_ITEMS = JsonPointer.of("additionalItems");

    private final boolean hasItems;
    private final boolean itemsIsArray;
    private final int itemsSize;
    private final boolean hasAdditional;

    public ArraySchemaSelector(final JsonNode digest) {
        hasItems = digest.get("hasItems").booleanValue();
        itemsIsArray = digest.get("itemsIsArray").booleanValue();
        itemsSize = digest.get("itemsSize").intValue();
        hasAdditional = digest.get("hasAdditional").booleanValue();
    }

    public Iterable<JsonPointer> selectSchemas(final int index) {
        if (!hasItems)
            return hasAdditional ? ImmutableList.of(ADDITIONAL_ITEMS) : Collections.<JsonPointer>emptyList();

        if (!itemsIsArray)
            return ImmutableList.of(ITEMS);

        if (index < itemsSize)
            return ImmutableList.of(ITEMS.append(index));

        return hasAdditional ? ImmutableList.of(ADDITIONAL_ITEMS) : Collections.<JsonPointer>emptyList();
    }
}