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package com.sun.jersey.server.impl.uri;

import com.sun.jersey.api.uri.UriComponent;
import com.sun.jersey.api.uri.UriTemplate;
import com.sun.jersey.api.uri.UriTemplateParser;

/**
 * A URI template for a URI path.
 *
 * @author [email protected]
 * @author Yegor Bugayenko ([email protected])
 */
public final class PathTemplate extends UriTemplate {

    /**
     * Internal parser of this PathTemplate.
     * @see #PathTemplate(String)
     */
    private static final class PathTemplateParser extends UriTemplateParser {
        /**
         * Public constructor.
         *
         * @param path the URI path template
         */
        public PathTemplateParser(final String path) {
            super(path);
        }
        /**
         * {@inheritDoc}
         */
        @Override
        protected String encodeLiteralCharacters(final String literalCharacters) {
            return UriComponent.contextualEncode(
                literalCharacters,
                UriComponent.Type.PATH
            );
        }
    }

    /**
     * Create a URI path template and encode (percent escape)
     * any characters of the template that are not valid
     * URI characters.
     * @param path the URI path template
     */
    public PathTemplate(final String path) {
        super(new PathTemplateParser(PathTemplate.prefixWithSlash(path)));
    }

    /**
     * Converts the path provided to a slash-leading
     * form, no matter what is provided.
     * @param path the URI path template
     * @return prefixed path
     * @see #PathTemplate(String)
     */
    private static String prefixWithSlash(final String path) {
        return path.startsWith("/") ? path : "/" + path;
    }

}