org.opencds.cqf.utilities.CanonicalUtils Maven / Gradle / Ivy

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package org.opencds.cqf.utilities;

import org.hl7.fhir.r4.model.CanonicalType;

public class CanonicalUtils {

    public static String getHead(String url) {
        int index = url.lastIndexOf("/");
        if (index == -1) {
            return null;
        } else if (index > 0) {
            return url.substring(0, index);
        } else {
            return "";
        }
    }

    public static String getTail(String url) {
        int index = url.lastIndexOf("/");
        if (index == -1) {
            return null;
        } else if (index > 0) {
            return url.substring(index + 1);
        } else {
            return "";
        }
    }

    public static String getId(CanonicalType canonical) {
        if (canonical.hasValue()) {
            String id = canonical.getValue();
            String temp = id.contains("/") ? id.substring(id.lastIndexOf("/") + 1) : id;
            return temp.split("\\|")[0];
        }

        throw new RuntimeException("CanonicalType must have a value for id extraction");
    }

    public static String getResourceName(CanonicalType canonical) {
        if (canonical.hasValue()) {
            String id = canonical.getValue();
            if (id.contains("/")) {
                id = id.replace(id.substring(id.lastIndexOf("/")), "");
                return id.contains("/") ? id.substring(id.lastIndexOf("/") + 1) : id;
            }
            return null;
        }

        throw new RuntimeException("CanonicalType must have a value for resource name extraction");
    }
}