/*
* Copyright (C) 2013 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.core;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
public final class LombokImmutableList<T> implements Iterable<T> {
private Object[] content;
private static final LombokImmutableList<?> EMPTY = new LombokImmutableList<Object>(new Object[0]);
@SuppressWarnings("unchecked")
public static <T> LombokImmutableList<T> of() {
return (LombokImmutableList<T>) EMPTY;
}
public static <T> LombokImmutableList<T> of(T a) {
return new LombokImmutableList<T>(new Object[] {a});
}
public static <T> LombokImmutableList<T> of(T a, T b) {
return new LombokImmutableList<T>(new Object[] {a, b});
}
public static <T> LombokImmutableList<T> of(T a, T b, T c) {
return new LombokImmutableList<T>(new Object[] {a, b, c});
}
public static <T> LombokImmutableList<T> of(T a, T b, T c, T d) {
return new LombokImmutableList<T>(new Object[] {a, b, c, d});
}
public static <T> LombokImmutableList<T> of(T a, T b, T c, T d, T e) {
return new LombokImmutableList<T>(new Object[] {a, b, c, d, e});
}
public static <T> LombokImmutableList<T> of(T a, T b, T c, T d, T e, T f, T... g) {
Object[] rest = g == null ? new Object[] {null} : g;
Object[] val = new Object[rest.length + 6];
System.arraycopy(rest, 0, val, 6, rest.length);
val[0] = a;
val[1] = b;
val[2] = c;
val[3] = d;
val[4] = e;
val[5] = f;
return new LombokImmutableList<T>(val);
}
public static <T> LombokImmutableList<T> copyOf(Collection<? extends T> list) {
return new LombokImmutableList<T>(list.toArray());
}
public static <T> LombokImmutableList<T> copyOf(Iterable<? extends T> iterable) {
List<T> list = new ArrayList<T>();
for (T o : iterable) list.add(o);
return copyOf(list);
}
public static <T> LombokImmutableList<T> copyOf(T[] array) {
Object[] content = new Object[array.length];
System.arraycopy(array, 0, content, 0, array.length);
return new LombokImmutableList<T>(content);
}
private LombokImmutableList(Object[] content) {
this.content = content;
}
public LombokImmutableList<T> replaceElementAt(int idx, T newValue) {
Object[] newContent = content.clone();
newContent[idx] = newValue;
return new LombokImmutableList<T>(newContent);
}
public LombokImmutableList<T> append(T newValue) {
int len = content.length;
Object[] newContent = new Object[len + 1];
System.arraycopy(content, 0, newContent, 0, len);
newContent[len] = newValue;
return new LombokImmutableList<T>(newContent);
}
public LombokImmutableList<T> prepend(T newValue) {
int len = content.length;
Object[] newContent = new Object[len + 1];
System.arraycopy(content, 0, newContent, 1, len);
newContent[0] = newValue;
return new LombokImmutableList<T>(newContent);
}
public int indexOf(T val) {
int len = content.length;
if (val == null) {
for (int i = 0; i < len; i++) if (content[i] == null) return i;
return -1;
}
for (int i = 0; i < len; i++) if (val.equals(content[i])) return i;
return -1;
}
public LombokImmutableList<T> removeElement(T val) {
int idx = indexOf(val);
return idx == -1 ? this : removeElementAt(idx);
}
public LombokImmutableList<T> removeElementAt(int idx) {
int len = content.length;
Object[] newContent = new Object[len - 1];
if (idx > 0) System.arraycopy(content, 0, newContent, 0, idx);
if (idx < len - 1) System.arraycopy(content, idx + 1, newContent, idx, len - idx - 1);
return new LombokImmutableList<T>(newContent);
}
public boolean isEmpty() {
return content.length == 0;
}
public int size() {
return content.length;
}
@SuppressWarnings("unchecked")
public T get(int idx) {
return (T) content[idx];
}
public boolean contains(T in) {
if (in == null) {
for (Object e : content) if (e == null) return true;
return false;
}
for (Object e : content) if (in.equals(e)) return true;
return false;
}
public Iterator<T> iterator() {
return new Iterator<T>() {
private int idx = 0;
@Override public boolean hasNext() {
return idx < content.length;
}
@SuppressWarnings("unchecked")
@Override public T next() {
if (idx < content.length) return (T) content[idx++];
throw new NoSuchElementException();
}
@Override public void remove() {
throw new UnsupportedOperationException("List is immutable");
}
};
}
@Override public String toString() {
return Arrays.toString(content);
}
@Override public boolean equals(Object obj) {
if (!(obj instanceof LombokImmutableList)) return false;
if (obj == this) return true;
return Arrays.equals(content, ((LombokImmutableList<?>) obj).content);
}
@Override public int hashCode() {
return Arrays.hashCode(content);
}
}