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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.util.bcel;
/**
* Constants for the project, mostly defined in the JVM specification.
*/
public final class Const {
/**
* Java class file format Magic number: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.1-200-A"> The ClassFile Structure
* in The Java Virtual Machine Specification</a>
*/
public static final int JVM_CLASSFILE_MAGIC = 0xCAFEBABE;
/**
* One of the access flags for fields, methods, or classes: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.1-200-E.1"> Flag definitions for
* Classes in the Java Virtual Machine Specification (Java SE 9 Edition).</a>
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.5"> Flag definitions for Fields
* in the Java Virtual Machine Specification (Java SE 9 Edition).</a>
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.6"> Flag definitions for Methods
* in the Java Virtual Machine Specification (Java SE 9 Edition).</a>
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.6-300-D.1-D.1"> Flag
* definitions for Inner Classes in the Java Virtual Machine Specification (Java SE 9 Edition).</a>
*/
public static final short ACC_FINAL = 0x0010;
/**
* One of the access flags for classes: {@value}.
*
* @see #ACC_FINAL
*/
public static final short ACC_INTERFACE = 0x0200;
/**
* One of the access flags for methods or classes: {@value}.
*
* @see #ACC_FINAL
*/
public static final short ACC_ABSTRACT = 0x0400;
/**
* One of the access flags for classes: {@value}.
*
* @see #ACC_FINAL
*/
public static final short ACC_ANNOTATION = 0x2000;
/**
* Marks a constant pool entry as type UTF-8: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.7"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Utf8 = 1;
/*
* The description of the constant pool is at: https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4
* References below are to the individual sections
*/
/**
* Marks a constant pool entry as type Integer: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.4"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Integer = 3;
/**
* Marks a constant pool entry as type Float: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.4"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Float = 4;
/**
* Marks a constant pool entry as type Long: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.5"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Long = 5;
/**
* Marks a constant pool entry as type Double: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.5"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Double = 6;
/**
* Marks a constant pool entry as a Class: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.1"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Class = 7;
/**
* Marks a constant pool entry as a Field Reference: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Fieldref = 9;
/**
* Marks a constant pool entry as type String: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.3"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_String = 8;
/**
* Marks a constant pool entry as a Method Reference: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Methodref = 10;
/**
* Marks a constant pool entry as an Interface Method Reference: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.2"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_InterfaceMethodref = 11;
/**
* Marks a constant pool entry as a name and type: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.6"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_NameAndType = 12;
/**
* Marks a constant pool entry as a Method Handle: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.8"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_MethodHandle = 15;
/**
* Marks a constant pool entry as a Method Type: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.9"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_MethodType = 16;
/**
* Marks a constant pool entry as dynamically computed: {@value}.
*
* @see <a href="https://bugs.openjdk.java.net/secure/attachment/74618/constant-dynamic.html"> Change request for JEP
* 309</a>
*/
public static final byte CONSTANT_Dynamic = 17;
/**
* Marks a constant pool entry as an Invoke Dynamic: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.10"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_InvokeDynamic = 18;
/**
* Marks a constant pool entry as a Module Reference: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4.11"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Module = 19;
/**
* Marks a constant pool entry as a Package Reference: {@value}.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4.12"> The Constant Pool in The
* Java Virtual Machine Specification</a>
*/
public static final byte CONSTANT_Package = 20;
/**
* The names of the types of entries in a constant pool. Use getConstantName instead
*/
private static final String[] CONSTANT_NAMES = {"", "CONSTANT_Utf8", "", "CONSTANT_Integer", "CONSTANT_Float", "CONSTANT_Long", "CONSTANT_Double",
"CONSTANT_Class", "CONSTANT_String", "CONSTANT_Fieldref", "CONSTANT_Methodref", "CONSTANT_InterfaceMethodref", "CONSTANT_NameAndType", "", "",
"CONSTANT_MethodHandle", "CONSTANT_MethodType", "CONSTANT_Dynamic", "CONSTANT_InvokeDynamic", "CONSTANT_Module", "CONSTANT_Package"};
/**
* The maximum number of dimensions in an array: {@value}. One of the limitations of the Java Virtual Machine.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.3.2-150"> Field Descriptors in
* The Java Virtual Machine Specification</a>
*/
public static final int MAX_ARRAY_DIMENSIONS = 255;
/**
* Minor version number of class files for Java 22: {@value}.
*
* @see #MAJOR_22
* @since 6.10.0
*/
public static final short MINOR_22 = 0;
/**
* Minor version number of class files for Java 23: {@value}.
*
* @see #MAJOR_23
* @since 6.10.0
*/
public static final short MINOR_23 = 0;
/**
* Minor version number of class files for Java 24: {@value}.
*
* @see #MAJOR_24
* @since 6.10.0
*/
public static final short MINOR_24 = 0;
/**
* Major version number of class files for Java 22: {@value}.
*
* @see #MINOR_22
* @since 6.10.0
*/
public static final short MAJOR_22 = 66;
/**
* Major version number of class files for Java 23: {@value}.
*
* @see #MINOR_23
* @since 6.10.0
*/
public static final short MAJOR_23 = 67;
/**
* Major version number of class files for Java 24: {@value}.
*
* @see #MINOR_24
* @since 6.10.0
*/
public static final short MAJOR_24 = 68;
/**
* Get the CONSTANT_NAMES entry at the given index.
*
* @param index index into {@code CONSTANT_NAMES}.
* @return the CONSTANT_NAMES entry at the given index
*/
public static String getConstantName(final int index) {
return CONSTANT_NAMES[index];
}
}
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