jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/codegen/types/ArrayType.java@8c51767d534d

     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  */

    26 package jdk.nashorn.internal.codegen.types;

    28 import static jdk.internal.org.objectweb.asm.Opcodes.AALOAD;

    29 import static jdk.internal.org.objectweb.asm.Opcodes.AASTORE;

    30 import static jdk.internal.org.objectweb.asm.Opcodes.ALOAD;

    31 import static jdk.internal.org.objectweb.asm.Opcodes.ANEWARRAY;

    32 import static jdk.internal.org.objectweb.asm.Opcodes.ARRAYLENGTH;

    34 import jdk.internal.org.objectweb.asm.MethodVisitor;

    36 /**

    37  * This is an array type, i.e. OBJECT_ARRAY, NUMBER_ARRAY.

    38  */

    39 public class ArrayType extends ObjectType implements BytecodeArrayOps {

    40     private static final long serialVersionUID = 1L;

    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     }

    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     }

    60     @Override

    61     public void astore(final MethodVisitor method) {

    62         method.visitInsn(AASTORE);

    63     }

    65     @Override

    66     public Type aload(final MethodVisitor method) {

    67         method.visitInsn(AALOAD);

    68         return getElementType();

    69     }

    71     @Override

    72     public Type arraylength(final MethodVisitor method) {

    73         method.visitInsn(ARRAYLENGTH);

    74         return INT;

    75     }

    77     @Override

    78     public Type newarray(final MethodVisitor method) {

    79         method.visitTypeInsn(ANEWARRAY, getElementType().getInternalName());

    80         return this;

    81     }

    83     @Override

    84     public Type newarray(final MethodVisitor method, final int dims) {

    85         method.visitMultiANewArrayInsn(getInternalName(), dims);

    86         return this;

    87     }

    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     }

    96     @Override

    97     public String toString() {

    98         return "array<elementType=" + getElementType().getTypeClass().getSimpleName() + '>';

    99     }

   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     }

   108 }

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