com.reandroid.utils.collection.ArraySupplierIterator Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ARSCLib Show documentation

Android binary resources read/write library

The newest version!

/*
 *  Copyright (C) 2022 github.com/REAndroid
 *
 *  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.reandroid.utils.collection;

import com.reandroid.common.ArraySupplier;

import java.util.Iterator;

public class ArraySupplierIterator implements Iterator, SizedIterator {

    private final ArraySupplier supplier;
    private final int mStart;
    private final int mLength;
    private int index;

    public ArraySupplierIterator(ArraySupplier supplier, int start, int length){
        this.supplier = supplier;
        this.mStart = start;
        this.mLength = length;
    }
    public ArraySupplierIterator(ArraySupplier supplier){
        this(supplier, 0, -1);
    }

    @Override
    public int getRemainingSize(){
        return getLength() - index;
    }

    @Override
    public boolean hasNext() {
        return index < getLength();
    }
    @Override
    public T next() {
        int i = mStart + index;
        index ++;
        return this.supplier.get(i);
    }


    private int getLength() {
        if(mLength < 0){
            return supplier.getCount();
        }
        return mLength;
    }

    public static Iterator of(ArraySupplier supplier){
        if(supplier == null || supplier.getCount() == 0){
            return EmptyIterator.of();
        }
        return new ArraySupplierIterator<>(supplier);
    }
    public static Iterator of(ArraySupplier supplier, int start, int length){
        if(supplier == null || length <= 0 || supplier.getCount() == 0){
            return EmptyIterator.of();
        }
        return new ArraySupplierIterator<>(supplier, start, length);
    }
}