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