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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.fragments;

import org.dmfs.iterators.AbstractConvertedIterator;
import org.dmfs.iterators.ConvertedIterator;
import org.dmfs.iterators.EmptyIterator;
import org.dmfs.rfc3986.Fragment;
import org.dmfs.rfc3986.UriEncoded;
import org.dmfs.rfc3986.encoding.Special;
import org.dmfs.rfc3986.params.Pair;
import org.dmfs.rfc3986.params.utils.UriFormEncodedPair;
import org.dmfs.rfc3986.utils.Split;

import java.util.Iterator;


/**
 * An adapter that turns any Fragment into a {@link ParametrizedFragment}.
 * 
 * TODO: consolidate with {@link org.dmfs.rfc3986.queries.FormUrlEncoded}.
 *
 * @author Marten Gajda
 */
public final class FormUrlEncoded implements ParametrizedFragment
{
    private final static AbstractConvertedIterator.Converter, CharSequence> CONVERTER = new AbstractConvertedIterator.Converter, CharSequence>()
    {
        @Override
        public Pair convert(CharSequence element)
        {
            return new UriFormEncodedPair(element);
        }
    };

    private final Fragment mDelegate;


    public FormUrlEncoded(Fragment delegate)
    {
        mDelegate = delegate;
    }


    @Override
    public Iterator> iterator()
    {
        if (!mDelegate.isPresent())
        {
            return EmptyIterator.instance();
        }

        UriEncoded text = mDelegate.value(Special.EMPTY);
        if (text.length() == 0)
        {
            return EmptyIterator.instance();
        }

        return new ConvertedIterator<>(new Split(text, '&'), CONVERTER);
    }


    @Override
    public boolean isPresent()
    {
        return mDelegate.isPresent();
    }


    @Override
    public UriEncoded value(UriEncoded defaultValue)
    {
        return mDelegate.value(defaultValue);
    }
}