org.dmfs.rfc3986.uris.StringUri Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of rfc3986-uri Show documentation
RFC 3986 compliant URI implementation.
There is a newer version: 0.8.1
/*
 * Copyright 2017 dmfs GmbH
 *
 * 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 org.dmfs.rfc3986.uris;

import org.dmfs.rfc3986.Authority;
import org.dmfs.rfc3986.Fragment;
import org.dmfs.rfc3986.Path;
import org.dmfs.rfc3986.Query;
import org.dmfs.rfc3986.Scheme;
import org.dmfs.rfc3986.Uri;
import org.dmfs.rfc3986.authorities.StringAuthority;
import org.dmfs.rfc3986.encoding.Precoded;
import org.dmfs.rfc3986.fragments.PrecodedFragment;
import org.dmfs.rfc3986.paths.StringPath;
import org.dmfs.rfc3986.queries.PrecodedQuery;
import org.dmfs.rfc3986.schemes.StringScheme;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


/**
 * A {@link Uri} based on a {@link String}.
 *
 * @author Marten Gajda
 */
public final class StringUri implements Uri
{
    private final static Pattern URI_PATTERN = Pattern.compile("^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?");

    private final String mUri;

    private String mScheme;
    private String mAuthority;
    private String mPath;
    private String mQuery;
    private String mFragment;


    public StringUri(String uri)
    {
        mUri = uri;
    }


    @Override
    public Scheme scheme()
    {
        parse();
        return new StringScheme(mScheme);
    }


    @Override
    public Authority authority()
    {
        parse();
        return new StringAuthority(mAuthority);
    }


    @Override
    public Path path()
    {
        parse();
        return new StringPath(mPath);
    }


    @Override
    public Query query()
    {
        parse();
        return new PrecodedQuery(mQuery == null ? null : new Precoded(mQuery));
    }


    @Override
    public Fragment fragment()
    {
        parse();
        return new PrecodedFragment(mFragment == null ? null : new Precoded(mFragment));
    }


    @Override
    public boolean isHierarchical()
    {
        parse();
        return mScheme == null || mAuthority != null || mPath.startsWith("/");
    }


    @Override
    public boolean isAbsolute()
    {
        parse();
        return mScheme != null;
    }


    private void parse()
    {
        if (mPath == null) // mPath should never be null after parsing
        {
            Matcher matcher = URI_PATTERN.matcher(mUri);
            if (!matcher.matches())
            {
                throw new IllegalArgumentException(String.format("Illegal URI '%s'", mUri));
            }
            mScheme = matcher.group(2);
            mAuthority = matcher.group(4);
            mPath = matcher.group(5);
            mQuery = matcher.group(7);
            mFragment = matcher.group(9);
        }
    }


    @Override
    public String toString()
    {
        return mUri;
    }
}