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ArrayValueImpl.java
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171 lines (151 loc) · 4.21 KB
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//
// MessagePack for Java
//
// Copyright (C) 2009 - 2013 FURUHASHI Sadayuki
//
// 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 org.msgpack.type;
import java.util.ListIterator;
import java.io.IOException;
import org.msgpack.packer.Packer;
class ArrayValueImpl extends AbstractArrayValue {
private static ArrayValueImpl emptyInstance = new ArrayValueImpl(new Value[0], true);
public static ArrayValue getEmptyInstance() {
return emptyInstance;
}
private Value[] array;
@Override
public Value[] getElementArray() {
return array;
}
ArrayValueImpl(Value[] array, boolean gift) {
if (gift) {
this.array = array;
} else {
this.array = new Value[array.length];
System.arraycopy(array, 0, this.array, 0, array.length);
}
}
@Override
public int size() {
return array.length;
}
@Override
public boolean isEmpty() {
return array.length == 0;
}
@Override
public Value get(int index) {
if (index < 0 || array.length <= index) {
throw new IndexOutOfBoundsException();
}
return array[index];
}
@Override
public int indexOf(Object o) {
if (o == null) {
return -1; // FIXME NullPointerException?
}
for (int i = 0; i < array.length; i++) {
if (array[i].equals(o)) {
return i;
}
}
return -1;
}
@Override
public int lastIndexOf(Object o) {
if (o == null) {
return -1; // FIXME NullPointerException?
}
for (int i = array.length - 1; i >= 0; i--) {
if (array[i].equals(o)) {
return i;
}
}
return -1;
}
@Override
public void writeTo(Packer pk) throws IOException {
pk.writeArrayBegin(array.length);
for (int i = 0; i < array.length; i++) {
array[i].writeTo(pk);
}
pk.writeArrayEnd();
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof Value)) {
return false;
}
Value v = (Value) o;
if (!v.isArrayValue()) {
return false;
}
if (v.getClass() == ArrayValueImpl.class) {
return equals((ArrayValueImpl) v);
}
ListIterator<Value> oi = v.asArrayValue().listIterator();
int i = 0;
while (i < array.length) {
if (!oi.hasNext() || !array[i].equals(oi.next())) {
return false;
}
i++;
}
return !oi.hasNext();
}
private boolean equals(ArrayValueImpl o) {
if (array.length != o.array.length) {
return false;
}
for (int i = 0; i < array.length; i++) {
if (!array[i].equals(o.array[i])) {
return false;
}
}
return true;
}
// TODO compareTo?
@Override
public int hashCode() {
int h = 1;
for (int i = 0; i < array.length; i++) {
Value obj = array[i];
h = 31 * h + obj.hashCode();
}
return h;
}
@Override
public String toString() {
return toString(new StringBuilder()).toString();
}
@Override
public StringBuilder toString(StringBuilder sb) {
if (array.length == 0) {
return sb.append("[]");
}
sb.append("[");
sb.append(array[0]);
for (int i = 1; i < array.length; i++) {
sb.append(",");
array[i].toString(sb);
}
sb.append("]");
return sb;
}
}