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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package com.sun.tools.doclets.internal.toolkit.util;

Abstraction for simple relative URIs, consisting of a path, an optional query, and an optional fragment. DocLink objects can be created by the constructors below or from a DocPath using the convenience methods, fragment and query. 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.
/**
 * Abstraction for simple relative URIs, consisting of a path,
 * an optional query, and an optional fragment. DocLink objects can
 * be created by the constructors below or from a DocPath using the
 * convenience methods, {@link DocPath#fragment fragment} and
 * {@link DocPath#query query}.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 */
@Deprecated
public class DocLink {
    final String path;
    final String query;
    final String fragment;

    
Create a DocLink representing the URI #fragment. /** Create a DocLink representing the URI {@code #fragment}. */
    public static DocLink fragment(String fragment) {
        return new DocLink((String) null, (String) null, fragment);
    }

    
Create a DocLink representing the URI path. /** Create a DocLink representing the URI {@code path}. */
    public DocLink(DocPath path) {
        this(path.getPath(), null, null);
    }

    
Create a DocLink representing the URI path?query#fragment. query and fragment may be null. /**
     * Create a DocLink representing the URI {@code path?query#fragment}.
     * query and fragment may be null.
     */
    public DocLink(DocPath path, String query, String fragment) {
        this(path.getPath(), query, fragment);
    }

    
Create a DocLink representing the URI path?query#fragment. Any of the component parts may be null. /**
     * Create a DocLink representing the URI {@code path?query#fragment}.
     * Any of the component parts may be null.
     */
    public DocLink(String path, String query, String fragment) {
        this.path = path;
        this.query = query;
        this.fragment = fragment;
    }

    
Return the link in the form "path?query#fragment", omitting any empty
components.
/**
     * Return the link in the form "path?query#fragment", omitting any empty
     * components.
     */
    @Override
    public String toString() {
        // common fast path
        if (path != null && isEmpty(query) && isEmpty(fragment))
            return path;

        StringBuilder sb = new StringBuilder();
        if (path != null)
            sb.append(path);
        if (!isEmpty(query))
            sb.append("?").append(query);
        if (!isEmpty(fragment))
            sb.append("#").append(fragment);
        return sb.toString();
    }

    private static boolean isEmpty(String s) {
        return (s == null) || s.isEmpty();
    }
}