com.landawn.abacus.util.ImmutableIterator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of abacus-android Show documentation

A general and simple library for Android

There is a newer version: 1.10.1

/*
 * Copyright (c) 2017, Haiyang Li.
 * 
 * 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 com.landawn.abacus.util;

import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import com.landawn.abacus.util.function.Supplier;

/**
 * 
 * @since 0.9
 * 
 * @author Haiyang Li
 */
abstract class ImmutableIterator implements java.util.Iterator {
    /**
     * @deprecated - UnsupportedOperationException
     */
    @Deprecated
    @Override
    public void remove() {
        throw new UnsupportedOperationException();
    }

    public Set toSet() {
        final Set set = new HashSet<>();

        while (hasNext()) {
            set.add(next());
        }

        return set;
    }

    public > C toCollection(final Supplier supplier) {
        final C c = supplier.get();

        while (hasNext()) {
            c.add(next());
        }

        return c;
    }

    public  Map toMap(final Try.Function keyMapper) throws E {
        return Iterators.toMap(this, keyMapper);
    }

    public  Map toMap(final Try.Function keyMapper,
            final Try.Function valueExtractor) throws E, E2 {
        return Iterators.toMap(this, keyMapper, valueExtractor);
    }

    public , E extends Exception, E2 extends Exception> M toMap(final Try.Function keyMapper,
            final Try.Function valueExtractor, final Supplier mapSupplier) throws E, E2 {
        return Iterators.toMap(this, keyMapper, valueExtractor, mapSupplier);
    }
}