1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.nashorn.internal.runtime.arrays;
import java.lang.reflect.Array;
import jdk.nashorn.internal.runtime.ScriptRuntime;
/**
* Place holding array data for non-array objects. Activates a true array when
* accessed. Should only exist as a singleton defined in ArrayData.
*/
final class NoTypeArrayData extends ArrayData {
NoTypeArrayData() {
super(0);
}
NoTypeArrayData(final long length) {
super(length);
}
@Override
public Object[] asObjectArray() {
return new Object[0];
}
@Override
public ArrayData copy() {
return new NoTypeArrayData();
}
@Override
public Object asArrayOfType(final Class<?> componentType) {
return Array.newInstance(componentType, 0);
}
@Override
public ArrayData convert(final Class<?> type) {
final long length = length();
final ArrayData arrayData;
if (type == Long.class) {
arrayData = new LongArrayData(new long[ArrayData.nextSize((int)length)], (int)length);
} else if (type == Double.class) {
arrayData = new NumberArrayData(new double[ArrayData.nextSize((int)length)], (int)length);
} else if (type == Integer.class) {
arrayData = new IntArrayData(new int[ArrayData.nextSize((int)length)], (int)length);
} else {
assert !type.isPrimitive();
arrayData = new ObjectArrayData(new Object[ArrayData.nextSize((int)length)], (int)length);
}
return length == 0 ? arrayData : new DeletedRangeArrayFilter(arrayData, 0, length - 1);
}
@Override
public void shiftLeft(final int by) {
//empty
}
@Override
public ArrayData shiftRight(final int by) {
return this;
}
@Override
public ArrayData ensure(final long safeIndex) {
if (safeIndex >= SparseArrayData.MAX_DENSE_LENGTH) {
return new SparseArrayData(this, safeIndex + 1);
}
// Don't trample the shared EMPTY_ARRAY.
if (length() == 0) {
return new NoTypeArrayData(Math.max(safeIndex + 1, length()));
}
setLength(Math.max(safeIndex + 1, length()));
return this;
}
@Override
public ArrayData shrink(final long newLength) {
return this;
}
@Override
public ArrayData set(final int index, final Object value, final boolean strict) {
ArrayData newData;
if (value instanceof Double) {
newData = convert(Double.class);
} else if (value instanceof Long) {
newData = convert(Long.class);
} else if (value instanceof Integer) {
newData = convert(Integer.class);
} else {
assert !(value instanceof Number);
newData = convert(value == null ? Object.class : value.getClass());
}
return newData.set(index, value, strict);
}
@Override
public ArrayData set(final int index, final int value, final boolean strict) {
final ArrayData newData = convert(Integer.class);
return newData.set(index, value, strict);
}
@Override
public ArrayData set(final int index, final long value, final boolean strict) {
final ArrayData newData = convert(Long.class);
return newData.set(index, value, strict);
}
@Override
public ArrayData set(final int index, final double value, final boolean strict) {
final ArrayData newData = convert(Double.class);
return newData.set(index, value, strict);
}
@Override
public int getInt(final int index) {
throw new ArrayIndexOutOfBoundsException(index);
}
@Override
public long getLong(final int index) {
throw new ArrayIndexOutOfBoundsException(index);
}
@Override
public double getDouble(final int index) {
throw new ArrayIndexOutOfBoundsException(index);
}
@Override
public Object getObject(final int index) {
throw new ArrayIndexOutOfBoundsException(index);
}
@Override
public boolean has(final int index) {
return false;
}
@Override
public ArrayData delete(final int index) {
return new DeletedRangeArrayFilter(this, index, index);
}
@Override
public ArrayData delete(final long fromIndex, final long toIndex) {
return new DeletedRangeArrayFilter(this, fromIndex, toIndex);
}
@Override
public Object pop() {
return ScriptRuntime.UNDEFINED;
}
@Override
public ArrayData slice(final long from, final long to) {
return this;
}
}
|
