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src/share/classes/com/sun/tools/classfile/Attribute.java@2eb010b6cb22 (annotated)

src/share/classes/com/sun/tools/classfile/Attribute.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 2289

3fbda1dca565

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package com.sun.tools.classfile;
aoqi@0	27
aoqi@0	28	import java.io.IOException;
aoqi@0	29	import java.lang.reflect.Constructor;
aoqi@0	30	import java.util.HashMap;
aoqi@0	31	import java.util.Map;
aoqi@0	32
aoqi@0	33	/**
aoqi@0	34	* <p><b>This is NOT part of any supported API.
aoqi@0	35	* If you write code that depends on this, you do so at your own risk.
aoqi@0	36	* This code and its internal interfaces are subject to change or
aoqi@0	37	* deletion without notice.</b>
aoqi@0	38	*/
aoqi@0	39
aoqi@0	40	public abstract class Attribute {
aoqi@0	41	public static final String AnnotationDefault = "AnnotationDefault";
aoqi@0	42	public static final String BootstrapMethods = "BootstrapMethods";
aoqi@0	43	public static final String CharacterRangeTable = "CharacterRangeTable";
aoqi@0	44	public static final String Code = "Code";
aoqi@0	45	public static final String ConstantValue = "ConstantValue";
aoqi@0	46	public static final String CompilationID = "CompilationID";
aoqi@0	47	public static final String Deprecated = "Deprecated";
aoqi@0	48	public static final String EnclosingMethod = "EnclosingMethod";
aoqi@0	49	public static final String Exceptions = "Exceptions";
aoqi@0	50	public static final String InnerClasses = "InnerClasses";
aoqi@0	51	public static final String LineNumberTable = "LineNumberTable";
aoqi@0	52	public static final String LocalVariableTable = "LocalVariableTable";
aoqi@0	53	public static final String LocalVariableTypeTable = "LocalVariableTypeTable";
aoqi@0	54	public static final String MethodParameters = "MethodParameters";
aoqi@0	55	public static final String RuntimeVisibleAnnotations = "RuntimeVisibleAnnotations";
aoqi@0	56	public static final String RuntimeInvisibleAnnotations = "RuntimeInvisibleAnnotations";
aoqi@0	57	public static final String RuntimeVisibleParameterAnnotations = "RuntimeVisibleParameterAnnotations";
aoqi@0	58	public static final String RuntimeInvisibleParameterAnnotations = "RuntimeInvisibleParameterAnnotations";
aoqi@0	59	public static final String RuntimeVisibleTypeAnnotations = "RuntimeVisibleTypeAnnotations";
aoqi@0	60	public static final String RuntimeInvisibleTypeAnnotations = "RuntimeInvisibleTypeAnnotations";
aoqi@0	61	public static final String Signature = "Signature";
aoqi@0	62	public static final String SourceDebugExtension = "SourceDebugExtension";
aoqi@0	63	public static final String SourceFile = "SourceFile";
aoqi@0	64	public static final String SourceID = "SourceID";
aoqi@0	65	public static final String StackMap = "StackMap";
aoqi@0	66	public static final String StackMapTable = "StackMapTable";
aoqi@0	67	public static final String Synthetic = "Synthetic";
aoqi@0	68
aoqi@0	69	public static class Factory {
aoqi@0	70	public Factory() {
aoqi@0	71	// defer init of standardAttributeClasses until after options set up
aoqi@0	72	}
aoqi@0	73
aoqi@0	74	public Attribute createAttribute(ClassReader cr, int name_index, byte[] data)
aoqi@0	75	throws IOException {
aoqi@0	76	if (standardAttributes == null) {
aoqi@0	77	init();
aoqi@0	78	}
aoqi@0	79
aoqi@0	80	ConstantPool cp = cr.getConstantPool();
aoqi@0	81	String reasonForDefaultAttr;
aoqi@0	82	try {
aoqi@0	83	String name = cp.getUTF8Value(name_index);
aoqi@0	84	Class<? extends Attribute> attrClass = standardAttributes.get(name);
aoqi@0	85	if (attrClass != null) {
aoqi@0	86	try {
aoqi@0	87	Class<?>[] constrArgTypes = {ClassReader.class, int.class, int.class};
aoqi@0	88	Constructor<? extends Attribute> constr = attrClass.getDeclaredConstructor(constrArgTypes);
aoqi@0	89	return constr.newInstance(new Object[] { cr, name_index, data.length });
aoqi@0	90	} catch (Throwable t) {
aoqi@0	91	reasonForDefaultAttr = t.toString();
aoqi@0	92	// fall through and use DefaultAttribute
aoqi@0	93	// t.printStackTrace();
aoqi@0	94	}
aoqi@0	95	} else {
aoqi@0	96	reasonForDefaultAttr = "unknown attribute";
aoqi@0	97	}
aoqi@0	98	} catch (ConstantPoolException e) {
aoqi@0	99	reasonForDefaultAttr = e.toString();
aoqi@0	100	// fall through and use DefaultAttribute
aoqi@0	101	}
aoqi@0	102	return new DefaultAttribute(cr, name_index, data, reasonForDefaultAttr);
aoqi@0	103	}
aoqi@0	104
aoqi@0	105	protected void init() {
aoqi@0	106	standardAttributes = new HashMap<String,Class<? extends Attribute>>();
aoqi@0	107	standardAttributes.put(AnnotationDefault, AnnotationDefault_attribute.class);
aoqi@0	108	standardAttributes.put(BootstrapMethods, BootstrapMethods_attribute.class);
aoqi@0	109	standardAttributes.put(CharacterRangeTable, CharacterRangeTable_attribute.class);
aoqi@0	110	standardAttributes.put(Code, Code_attribute.class);
aoqi@0	111	standardAttributes.put(CompilationID, CompilationID_attribute.class);
aoqi@0	112	standardAttributes.put(ConstantValue, ConstantValue_attribute.class);
aoqi@0	113	standardAttributes.put(Deprecated, Deprecated_attribute.class);
aoqi@0	114	standardAttributes.put(EnclosingMethod, EnclosingMethod_attribute.class);
aoqi@0	115	standardAttributes.put(Exceptions, Exceptions_attribute.class);
aoqi@0	116	standardAttributes.put(InnerClasses, InnerClasses_attribute.class);
aoqi@0	117	standardAttributes.put(LineNumberTable, LineNumberTable_attribute.class);
aoqi@0	118	standardAttributes.put(LocalVariableTable, LocalVariableTable_attribute.class);
aoqi@0	119	standardAttributes.put(LocalVariableTypeTable, LocalVariableTypeTable_attribute.class);
aoqi@0	120	standardAttributes.put(MethodParameters, MethodParameters_attribute.class);
aoqi@0	121	standardAttributes.put(RuntimeInvisibleAnnotations, RuntimeInvisibleAnnotations_attribute.class);
aoqi@0	122	standardAttributes.put(RuntimeInvisibleParameterAnnotations, RuntimeInvisibleParameterAnnotations_attribute.class);
aoqi@0	123	standardAttributes.put(RuntimeVisibleAnnotations, RuntimeVisibleAnnotations_attribute.class);
aoqi@0	124	standardAttributes.put(RuntimeVisibleParameterAnnotations, RuntimeVisibleParameterAnnotations_attribute.class);
aoqi@0	125	standardAttributes.put(RuntimeVisibleTypeAnnotations, RuntimeVisibleTypeAnnotations_attribute.class);
aoqi@0	126	standardAttributes.put(RuntimeInvisibleTypeAnnotations, RuntimeInvisibleTypeAnnotations_attribute.class);
aoqi@0	127	standardAttributes.put(Signature, Signature_attribute.class);
aoqi@0	128	standardAttributes.put(SourceDebugExtension, SourceDebugExtension_attribute.class);
aoqi@0	129	standardAttributes.put(SourceFile, SourceFile_attribute.class);
aoqi@0	130	standardAttributes.put(SourceID, SourceID_attribute.class);
aoqi@0	131	standardAttributes.put(StackMap, StackMap_attribute.class);
aoqi@0	132	standardAttributes.put(StackMapTable, StackMapTable_attribute.class);
aoqi@0	133	standardAttributes.put(Synthetic, Synthetic_attribute.class);
aoqi@0	134	}
aoqi@0	135
aoqi@0	136	private Map<String,Class<? extends Attribute>> standardAttributes;
aoqi@0	137	}
aoqi@0	138
aoqi@0	139	public static Attribute read(ClassReader cr) throws IOException {
aoqi@0	140	return cr.readAttribute();
aoqi@0	141	}
aoqi@0	142
aoqi@0	143	protected Attribute(int name_index, int length) {
aoqi@0	144	attribute_name_index = name_index;
aoqi@0	145	attribute_length = length;
aoqi@0	146	}
aoqi@0	147
aoqi@0	148	public String getName(ConstantPool constant_pool) throws ConstantPoolException {
aoqi@0	149	return constant_pool.getUTF8Value(attribute_name_index);
aoqi@0	150	}
aoqi@0	151
aoqi@0	152	public abstract <R,D> R accept(Attribute.Visitor<R,D> visitor, D data);
aoqi@0	153
aoqi@0	154	public int byteLength() {
aoqi@0	155	return 6 + attribute_length;
aoqi@0	156	}
aoqi@0	157
aoqi@0	158	public final int attribute_name_index;
aoqi@0	159	public final int attribute_length;
aoqi@0	160
aoqi@0	161
aoqi@0	162	public interface Visitor<R,P> {
aoqi@0	163	R visitBootstrapMethods(BootstrapMethods_attribute attr, P p);
aoqi@0	164	R visitDefault(DefaultAttribute attr, P p);
aoqi@0	165	R visitAnnotationDefault(AnnotationDefault_attribute attr, P p);
aoqi@0	166	R visitCharacterRangeTable(CharacterRangeTable_attribute attr, P p);
aoqi@0	167	R visitCode(Code_attribute attr, P p);
aoqi@0	168	R visitCompilationID(CompilationID_attribute attr, P p);
aoqi@0	169	R visitConstantValue(ConstantValue_attribute attr, P p);
aoqi@0	170	R visitDeprecated(Deprecated_attribute attr, P p);
aoqi@0	171	R visitEnclosingMethod(EnclosingMethod_attribute attr, P p);
aoqi@0	172	R visitExceptions(Exceptions_attribute attr, P p);
aoqi@0	173	R visitInnerClasses(InnerClasses_attribute attr, P p);
aoqi@0	174	R visitLineNumberTable(LineNumberTable_attribute attr, P p);
aoqi@0	175	R visitLocalVariableTable(LocalVariableTable_attribute attr, P p);
aoqi@0	176	R visitLocalVariableTypeTable(LocalVariableTypeTable_attribute attr, P p);
aoqi@0	177	R visitMethodParameters(MethodParameters_attribute attr, P p);
aoqi@0	178	R visitRuntimeVisibleAnnotations(RuntimeVisibleAnnotations_attribute attr, P p);
aoqi@0	179	R visitRuntimeInvisibleAnnotations(RuntimeInvisibleAnnotations_attribute attr, P p);
aoqi@0	180	R visitRuntimeVisibleParameterAnnotations(RuntimeVisibleParameterAnnotations_attribute attr, P p);
aoqi@0	181	R visitRuntimeInvisibleParameterAnnotations(RuntimeInvisibleParameterAnnotations_attribute attr, P p);
aoqi@0	182	R visitRuntimeVisibleTypeAnnotations(RuntimeVisibleTypeAnnotations_attribute attr, P p);
aoqi@0	183	R visitRuntimeInvisibleTypeAnnotations(RuntimeInvisibleTypeAnnotations_attribute attr, P p);
aoqi@0	184	R visitSignature(Signature_attribute attr, P p);
aoqi@0	185	R visitSourceDebugExtension(SourceDebugExtension_attribute attr, P p);
aoqi@0	186	R visitSourceFile(SourceFile_attribute attr, P p);
aoqi@0	187	R visitSourceID(SourceID_attribute attr, P p);
aoqi@0	188	R visitStackMap(StackMap_attribute attr, P p);
aoqi@0	189	R visitStackMapTable(StackMapTable_attribute attr, P p);
aoqi@0	190	R visitSynthetic(Synthetic_attribute attr, P p);
aoqi@0	191	}
aoqi@0	192	}