edu.mayo.cts2.framework.plugin.service.lexevs.uri.UriUtils.java Source code

Introduction

Here is the source code for edu.mayo.cts2.framework.plugin.service.lexevs.uri.UriUtils.java

Source

/*
* Copyright: (c) Mayo Foundation for Medical Education and
* Research (MFMER). All rights reserved. MAYO, MAYO CLINIC, and the
* triple-shield Mayo logo are trademarks and service marks of MFMER.
*
* Distributed under the OSI-approved BSD 3-Clause License.
* See http://ncip.github.com/lexevs-service/LICENSE.txt for details.
*/
package edu.mayo.cts2.framework.plugin.service.lexevs.uri;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import org.apache.commons.lang.StringUtils;

/**
 * A Utility class for handling CTS2/LexGrid URIs.
 *
 * @author <a href="mailto:kevin.peterson@mayo.edu">Kevin Peterson</a>
 */
public final class UriUtils {

    private static final Set<Character> SEPARATORS = new HashSet<Character>(Arrays.asList(':', '#', '/'));

    private static final String URN_PREFIX = "urn:";

    private static final String URN_SEPARATOR = ":";

    /**
     * The Constant DEFAULT_SEPARATOR.
     */
    private static final String DEFAULT_SEPARATOR = "/";

    private UriUtils() {
        super();
    }

    /**
     * Combine a URI and another token/string.
     *
     * @param uri the uri
     * @param tokenToAppend the token to append
     * @return the string
     */
    public static String combine(String uri, String tokenToAppend) {
        char lastChar = uri.charAt(uri.length() - 1);
        if (SEPARATORS.contains(lastChar)) {
            return uri + tokenToAppend;
        } else {
            if (StringUtils.startsWithIgnoreCase(uri, URN_PREFIX)) {
                return uri + URN_SEPARATOR + tokenToAppend;
            } else {
                return uri + DEFAULT_SEPARATOR + tokenToAppend;
            }
        }
    }

    /**
     * Gets the local part of a URI.
     *
     * @param uri the uri
     * @return the local part
     */
    public static String getLocalPart(String uri) {
        int separator = getSeparatorPosition(uri);

        return StringUtils.substring(uri, separator + 1);
    }

    /**
     * Gets the namespace part of a URI.
     *
     * @param uri the uri
     * @return the namespace
     */
    public static String getNamespace(String uri) {
        int separator = getSeparatorPosition(uri);

        return StringUtils.substring(uri, 0, separator);
    }

    public static char getSeparator(String uri) {
        int separator = getSeparatorPosition(uri);

        return uri.charAt(separator);
    }

    private static int getSeparatorPosition(String string) {
        char[] chars = string.toCharArray();

        for (int i = chars.length - 1; i > 0; i--) {
            if (SEPARATORS.contains(chars[i])) {
                return i;
            }
        }

        throw new BadUriException("Malformed URI: " + string);
    }

    public static class BadUriException extends IllegalArgumentException {

        private static final long serialVersionUID = 7847250670382555646L;

        private BadUriException(String message) {
            super(message);
        }

    }
}