org.dmfs.rfc3986.parameters.parametersets.Replacing Maven / Gradle / Ivy

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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.parameters.parametersets;

import org.dmfs.iterators.AbstractFilteredIterator;
import org.dmfs.iterators.ArrayIterator;
import org.dmfs.iterators.FilteredIterator;
import org.dmfs.iterators.SerialIterator;
import org.dmfs.rfc3986.parameters.Parameter;
import org.dmfs.rfc3986.parameters.ParameterList;

import java.util.Iterator;


/**
 * {@link ParameterList} that replaces values of the decorated {@link ParameterList} with the given values.
 *
 * @author Marten Gajda
 */
public final class Replacing implements ParameterList
{
    private final ParameterList mDelegate;
    private final Parameter[] mNewParameters;


    public Replacing(ParameterList delegate, Parameter... newParameters)
    {
        mDelegate = delegate;
        mNewParameters = newParameters;
    }


    @Override
    public Iterator iterator()
    {
        return new SerialIterator<>(
                new FilteredIterator<>(mDelegate.iterator(), new AbstractFilteredIterator.IteratorFilter()
                {
                    @Override
                    public boolean iterate(Parameter element)
                    {
                        // don't iterate keys that we have in mNewParameters
                        for (Parameter parameter : mNewParameters)
                        {
                            // TODO: get rid of the toString conversion and use something like an `Equalable`
                            // TODO: maybe move this check to ParameterType
                            if (parameter.name().toString().equals(element.name().toString()))
                            {
                                return false;
                            }
                        }
                        return true;
                    }
                }), new ArrayIterator<>(mNewParameters));
    }
}