1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.internal.codegen.types;
27
28import static jdk.internal.org.objectweb.asm.Opcodes.AALOAD;
29import static jdk.internal.org.objectweb.asm.Opcodes.AASTORE;
30import static jdk.internal.org.objectweb.asm.Opcodes.ALOAD;
31import static jdk.internal.org.objectweb.asm.Opcodes.ANEWARRAY;
32import static jdk.internal.org.objectweb.asm.Opcodes.ARRAYLENGTH;
33
34import jdk.internal.org.objectweb.asm.MethodVisitor;
35
36/**
37 * This is an array type, i.e. OBJECT_ARRAY, NUMBER_ARRAY.
38 */
39public class ArrayType extends ObjectType implements BytecodeArrayOps {
40    private static final long serialVersionUID = 1L;
41
42    /**
43     * Constructor
44     *
45     * @param clazz the Java class representation of the array
46     */
47    protected ArrayType(final Class<?> clazz) {
48        super(clazz);
49    }
50
51    /**
52     * Get the element type of the array elements e.g. for OBJECT_ARRAY, this is OBJECT
53     *
54     * @return the element type
55     */
56    public Type getElementType() {
57        return Type.typeFor(getTypeClass().getComponentType());
58    }
59
60    @Override
61    public void astore(final MethodVisitor method) {
62        method.visitInsn(AASTORE);
63    }
64
65    @Override
66    public Type aload(final MethodVisitor method) {
67        method.visitInsn(AALOAD);
68        return getElementType();
69    }
70
71    @Override
72    public Type arraylength(final MethodVisitor method) {
73        method.visitInsn(ARRAYLENGTH);
74        return INT;
75    }
76
77    @Override
78    public Type newarray(final MethodVisitor method) {
79        method.visitTypeInsn(ANEWARRAY, getElementType().getInternalName());
80        return this;
81    }
82
83    @Override
84    public Type newarray(final MethodVisitor method, final int dims) {
85        method.visitMultiANewArrayInsn(getInternalName(), dims);
86        return this;
87    }
88
89    @Override
90    public Type load(final MethodVisitor method, final int slot) {
91        assert slot != -1;
92        method.visitVarInsn(ALOAD, slot);
93        return this;
94    }
95
96    @Override
97    public String toString() {
98        return "array<elementType=" + getElementType().getTypeClass().getSimpleName() + '>';
99    }
100
101    @Override
102    public Type convert(final MethodVisitor method, final Type to) {
103        assert to.isObject();
104        assert !to.isArray() || ((ArrayType)to).getElementType() == getElementType();
105        return to;
106    }
107
108}
109