com.b2international.snowowl.snomed.datastore.id.RandomSnomedIdentiferGenerator.java Source code

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Here is the source code for com.b2international.snowowl.snomed.datastore.id.RandomSnomedIdentiferGenerator.java

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/*
 * Copyright 2011-2018 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.b2international.snowowl.snomed.datastore.id;

import com.b2international.commons.VerhoeffCheck;
import com.b2international.snowowl.core.terminology.ComponentCategory;
import com.b2international.snowowl.snomed.datastore.id.gen.RandomItemIdGenerationStrategy;
import com.google.common.base.Strings;

public abstract class RandomSnomedIdentiferGenerator {

    private RandomSnomedIdentiferGenerator() {
    }

    public final static String generateConceptId() {
        return generateSnomedId(ComponentCategory.CONCEPT);
    }

    public final static String generateDescriptionId() {
        return generateSnomedId(ComponentCategory.DESCRIPTION);
    }

    public final static String generateRelationshipId() {
        return generateSnomedId(ComponentCategory.RELATIONSHIP);
    }

    private static String generateSnomedId(ComponentCategory category) {
        final String selectedNamespace = "";
        final StringBuilder builder = new StringBuilder();
        // generate the SCT Item ID
        builder.append(new RandomItemIdGenerationStrategy().generateItemIds(selectedNamespace, category, 1, 1)
                .stream().findFirst().get());

        // append namespace and the first part of the partition-identifier
        if (Strings.isNullOrEmpty(selectedNamespace)) {
            builder.append('0');
        } else {
            builder.append(selectedNamespace);
            builder.append('1');
        }

        // append the second part of the partition-identifier
        builder.append(category.ordinal());

        // calc check-digit
        builder.append(VerhoeffCheck.calculateChecksum(builder, false));

        return builder.toString();
    }

}