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com.bestvike.linq.enumerable._Grouping Maven / Gradle / Ivy
package com.bestvike.linq.enumerable;
import com.bestvike.collections.generic.IArray;
import com.bestvike.function.Predicate1;
import com.bestvike.linq.IEnumerator;
import com.bestvike.linq.IGrouping;
import com.bestvike.linq.adapter.enumerator.ArrayEnumerator;
import com.bestvike.linq.debug.DebuggerDisplay;
import com.bestvike.linq.debug.DebuggerTypeProxy;
import com.bestvike.linq.debug.GroupingDebugView;
import com.bestvike.linq.exception.ExceptionArgument;
import com.bestvike.linq.exception.ThrowHelper;
import com.bestvike.linq.util.ArrayUtils;
import java.util.Collection;
import java.util.List;
/**
* Created by 许崇雷 on 2018-04-28.
*/
@DebuggerDisplay("Key = {getKey()}")
@DebuggerTypeProxy(GroupingDebugView.class)
final class Grouping implements IGrouping, IArray {
final TKey key;
final int hashCode;
Object[] elements;
int count;
Grouping hashNext;
Grouping next;
boolean fetched;
Grouping(TKey key, int hashCode) {
this.key = key;
this.hashCode = hashCode;
this.elements = new Object[1];
}
void add(TElement element) {
if (this.elements.length == this.count)
this.elements = ArrayUtils.resize(this.elements, Math.multiplyExact(this.count, 2));
this.elements[this.count] = element;
this.count++;
}
public void trim() {
if (this.elements.length != this.count)
this.elements = ArrayUtils.resize(this.elements, this.count);
}
@Override
public IEnumerator enumerator() {
return new ArrayEnumerator<>(this.elements, 0, this.count);
}
@Override
public TKey getKey() {
return this.key;
}
@Override
public Object[] getArray() {
return this.elements;
}
@Override
public TElement get(int index) {
if (index < 0 || index >= this.count)
ThrowHelper.throwArgumentOutOfRangeException(ExceptionArgument.index);
//noinspection unchecked
return (TElement) this.elements[index];
}
@Override
public int _indexOf(TElement item) {
return ArrayUtils.indexOf(this.elements, item, 0, this.count);
}
@Override
public int _lastIndexOf(TElement item) {
return ArrayUtils.lastIndexOf(this.elements, item, this.count - 1, this.count);
}
@Override
public int _findIndex(Predicate1 match) {
//noinspection unchecked
return ArrayUtils.findIndex(this.elements, 0, this.count, (Predicate1) match);
}
@Override
public int _findLastIndex(Predicate1 match) {
//noinspection unchecked
return ArrayUtils.findLastIndex(this.elements, this.count - 1, this.count, (Predicate1) match);
}
@Override
public Collection getCollection() {
return ArrayUtils.toCollection(this.elements, 0, this.count);
}
@Override
public int _getCount() {
return this.count;
}
@Override
public boolean _contains(TElement item) {
return ArrayUtils.contains(this.elements, item, 0, this.count);
}
@Override
public void _copyTo(Object[] array, int arrayIndex) {
System.arraycopy(this.elements, 0, array, arrayIndex, this.count);
}
@Override
public TElement[] _toArray(Class clazz) {
return ArrayUtils.toArray(this.elements, clazz, 0, this.count);
}
@Override
public Object[] _toArray() {
return ArrayUtils.resize(this.elements, this.count);
}
@Override
public List _toList() {
return ArrayUtils.toList(this.elements, 0, this.count);
}
}
