org.boon.collections.LongList Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of boon Show documentation
Show all versions of boon Show documentation
Simple opinionated Java for the novice to expert level Java Programmer.
Low Ceremony. High Productivity. A real boon to Java to developers!
/*
* Copyright 2013-2014 Richard M. Hightower
* 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.
*
* __________ _____ __ .__
* \______ \ ____ ____ ____ /\ / \ _____ | | _|__| ____ ____
* | | _// _ \ / _ \ / \ \/ / \ / \\__ \ | |/ / |/ \ / ___\
* | | ( <_> | <_> ) | \ /\ / Y \/ __ \| <| | | \/ /_/ >
* |______ /\____/ \____/|___| / \/ \____|__ (____ /__|_ \__|___| /\___ /
* \/ \/ \/ \/ \/ \//_____/
* ____. ___________ _____ ______________.___.
* | |____ ___ _______ \_ _____/ / _ \ / _____/\__ | |
* | \__ \\ \/ /\__ \ | __)_ / /_\ \ \_____ \ / | |
* /\__| |/ __ \\ / / __ \_ | \/ | \/ \ \____ |
* \________(____ /\_/ (____ / /_______ /\____|__ /_______ / / ______|
* \/ \/ \/ \/ \/ \/
*/
package org.boon.collections;
import org.boon.StringScanner;
import org.boon.core.reflection.BeanUtils;
import org.boon.core.reflection.fields.FieldAccess;
import org.boon.primitive.Lng;
import java.util.AbstractList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Map;
import static org.boon.primitive.Lng.grow;
/**
* Holds primitive values in a list like object for long.
*
*
* Has sum, mean, median, standardDeviation, reduceBy,
* variance.
*
*
* @author Rick Hightower
*/
public class LongList extends AbstractList {
/**
* Values in this list.
*/
private long[] values;
/**
* Index of last value added.
*/
private int end;
/**
* Create a new list with this many items in it.
*/
public LongList(int capacity) {
this.values = new long[capacity];
}
/**
* Create a new list with exactly 10 items in it.
*/
public LongList() {
this.values = new long[10];
}
/**
* Create a new list with this many items in it.
*/
public LongList(long values[]) {
this.values = values;
this.end = values.length;
}
/**
* Creates a primitive list based on an input list and a property path
*
* @param inputList input list
* @param propertyPath property path
* @return primitive list
*/
public static LongList toLongList(Collection inputList, String propertyPath) {
if (inputList.size() == 0) {
return new LongList(0);
}
LongList outputList = new LongList(inputList.size());
if (propertyPath.contains(".") || propertyPath.contains("[")) {
String[] properties = StringScanner.splitByDelimiters(propertyPath, ".[]");
for (Object o : inputList) {
outputList.add(BeanUtils.getPropertyLong(o, properties));
}
} else {
Map fields = BeanUtils.getFieldsFromObject(inputList.iterator().next());
FieldAccess fieldAccess = fields.get(propertyPath);
for (Object o : inputList) {
outputList.add(fieldAccess.getLong(o));
}
}
return outputList;
}
/**
* Get the value at index
*
* @param index index
* @return value
*/
@Override
public Long get(int index) {
return values[index];
}
/**
* Get the value at index but don't use a wrapper
*
* @param index index
* @return value
*/
public final long getInt(int index) {
return values[index];
}
/**
* Add a new value to the list.
*
* @param integer new value
* @return was able to add.
*/
@Override
public boolean add(Long integer) {
if (end + 1 >= values.length) {
values = grow(values);
}
values[end] = integer;
end++;
return true;
}
/**
* Add a new value to the list but don't employ a wrapper.
*
* @param integer new value
* @return was able to add.
*/
public boolean addLong(long integer) {
if (end + 1 >= values.length) {
values = grow(values);
}
values[end] = integer;
end++;
return true;
}
/**
* Add a new value to the list but don't employ a wrapper.
*
* @param integer new value
* @return was able to add.
*/
public LongList add(long integer) {
if (end + 1 >= values.length) {
values = grow(values);
}
values[end] = integer;
end++;
return this;
}
/**
* Add a new array to the list.
*
* @return was able to add.
*/
public boolean addArray(long... integers) {
if (end + integers.length >= values.length) {
values = grow(values, (values.length + integers.length) * 2);
}
System.arraycopy(integers, 0, values, end, integers.length);
end += integers.length;
return true;
}
/**
* Set a value in the list.
*
* @param index index
* @param element new value
* @return old value at this index
*/
@Override
public Long set(int index, Long element) {
long oldValue = values[index];
values[index] = element;
return oldValue;
}
/**
* Set in a new value no wrapper
*
* @param index index
* @param element new value
* @return old value at this index
*/
public long setLong(int index, int element) {
long oldValue = values[index];
values[index] = element;
return oldValue;
}
/**
* Return the current size.
*
* @return
*/
@Override
public int size() {
return end;
}
/**
* Sums the values with bounds checking.
*/
public long sum() {
return Lng.sum(values, end);
}
/**
* Get a copy of the array up to the end element.
*
* @return
*/
public long[] toValueArray() {
return java.util.Arrays.copyOfRange(values, 0, end);
}
/**
* This would be a good opportunity to reintroduce dynamic invoke
*
* @param function function
* @return
*/
public long reduceBy(Object function) {
return Lng.reduceBy(values, end, function);
}
/**
* This would be a good opportunity to reintroduce dynamic invoke
*
* @param function function
* @return
*/
public long reduceBy(Object function, String name) {
return Lng.reduceBy(values, end, function, name);
}
/**
* @param reduceBy reduceBy function
* @return the reduction
*/
public long reduceBy(Lng.ReduceBy reduceBy) {
return Lng.reduceBy(values, end, reduceBy);
}
/**
* Mean
*
* @return mean
*/
public long mean() {
return Lng.mean(values, end);
}
/**
* standardDeviation
*
* @return standardDeviation
*/
public long standardDeviation() {
return Lng.standardDeviation(values, end);
}
/**
* variance
*
* @return variance
*/
public long variance() {
return Lng.variance(values, end);
}
/**
* max
*
* @return max
*/
public long max() {
return Lng.max(values, end);
}
/**
* min
*
* @return min
*/
public long min() {
return Lng.min(values, end);
}
/**
* median
*
* @return median
*/
public long median() {
return Lng.median(values, end);
}
/**
* sort
*
* @return sort
*/
public void sort() {
Arrays.sort(values, 0, end);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
LongList longs = (LongList) o;
if (end != longs.end) return false;
if (!Lng.equals(0, end, values, longs.values)) return false;
return true;
}
@Override
public int hashCode() {
int result = 131313;
result = 31 * result + (values != null ? Lng.hashCode(0, end, values) : 0);
result = 31 * result + end;
return result;
}
public void clear() {
this.values = new long[10];
this.end = 0;
}
}