Mercurial > hg > Members > sugi > MessagePack-java

comparison src/main/java/org/msgpack/type/ArrayValueImpl.java @ 0:cb825acd883a

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author sugi
date Sat, 18 Oct 2014 15:06:15 +0900
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-1:000000000000 0:cb825acd883a
1 //
2 // MessagePack for Java
3 //
4 // Copyright (C) 2009 - 2013 FURUHASHI Sadayuki
5 //
6 // Licensed under the Apache License, Version 2.0 (the "License");
7 // you may not use this file except in compliance with the License.
8 // You may obtain a copy of the License at
9 //
10 // http://www.apache.org/licenses/LICENSE-2.0
11 //
12 // Unless required by applicable law or agreed to in writing, software
13 // distributed under the License is distributed on an "AS IS" BASIS,
14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 // See the License for the specific language governing permissions and
16 // limitations under the License.
17 //
18 package org.msgpack.type;
19
20 import java.util.ListIterator;
21 import java.io.IOException;
22 import org.msgpack.packer.Packer;
23
24 class ArrayValueImpl extends AbstractArrayValue {
25 private static ArrayValueImpl emptyInstance = new ArrayValueImpl(new Value[0], true);
26
27 public static ArrayValue getEmptyInstance() {
28 return emptyInstance;
29 }
30
31 private Value[] array;
32
33 @Override
34 public Value[] getElementArray() {
35 return array;
36 }
37
38 ArrayValueImpl(Value[] array, boolean gift) {
39 if (gift) {
40 this.array = array;
41 } else {
42 this.array = new Value[array.length];
43 System.arraycopy(array, 0, this.array, 0, array.length);
44 }
45 }
46
47 @Override
48 public int size() {
49 return array.length;
50 }
51
52 @Override
53 public boolean isEmpty() {
54 return array.length == 0;
55 }
56
57 @Override
58 public Value get(int index) {
59 if (index < 0 || array.length <= index) {
60 throw new IndexOutOfBoundsException();
61 }
62 return array[index];
63 }
64
65 @Override
66 public int indexOf(Object o) {
67 if (o == null) {
68 return -1; // FIXME NullPointerException?
69 }
70 for (int i = 0; i < array.length; i++) {
71 if (array[i].equals(o)) {
72 return i;
73 }
74 }
75 return -1;
76 }
77
78 @Override
79 public int lastIndexOf(Object o) {
80 if (o == null) {
81 return -1; // FIXME NullPointerException?
82 }
83 for (int i = array.length - 1; i >= 0; i--) {
84 if (array[i].equals(o)) {
85 return i;
86 }
87 }
88 return -1;
89 }
90
91 @Override
92 public void writeTo(Packer pk) throws IOException {
93 pk.writeArrayBegin(array.length);
94 for (int i = 0; i < array.length; i++) {
95 array[i].writeTo(pk);
96 }
97 pk.writeArrayEnd();
98 }
99
100 @Override
101 public boolean equals(Object o) {
102 if (o == this) {
103 return true;
104 }
105 if (!(o instanceof Value)) {
106 return false;
107 }
108 Value v = (Value) o;
109 if (!v.isArrayValue()) {
110 return false;
111 }
112
113 if (v.getClass() == ArrayValueImpl.class) {
114 return equals((ArrayValueImpl) v);
115 }
116
117 ListIterator<Value> oi = v.asArrayValue().listIterator();
118 int i = 0;
119 while (i < array.length) {
120 if (!oi.hasNext() || !array[i].equals(oi.next())) {
121 return false;
122 }
123 i++;
124 }
125 return !oi.hasNext();
126 }
127
128 private boolean equals(ArrayValueImpl o) {
129 if (array.length != o.array.length) {
130 return false;
131 }
132 for (int i = 0; i < array.length; i++) {
133 if (!array[i].equals(o.array[i])) {
134 return false;
135 }
136 }
137 return true;
138 }
139
140 // TODO compareTo?
141
142 @Override
143 public int hashCode() {
144 int h = 1;
145 for (int i = 0; i < array.length; i++) {
146 Value obj = array[i];
147 h = 31 * h + obj.hashCode();
148 }
149 return h;
150 }
151
152 @Override
153 public String toString() {
154 return toString(new StringBuilder()).toString();
155 }
156
157 @Override
158 public StringBuilder toString(StringBuilder sb) {
159 if (array.length == 0) {
160 return sb.append("[]");
161 }
162 sb.append("[");
163 sb.append(array[0]);
164 for (int i = 1; i < array.length; i++) {
165 sb.append(",");
166 array[i].toString(sb);
167 }
168 sb.append("]");
169 return sb;
170 }
171 }