JDK 11 java.xml.jmod - XML Module
JDK 11 java.xml.jmod is the JMOD file for JDK 11 XML (eXtensible Markup Language) module.
JDK 11 XML module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\java.xml.jmod.
JDK 11 XML module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.
JDK 11 XML module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\java.xml.
You can click and view the content of each source code file in the list below.
✍: FYIcenter
⏎ com/sun/org/apache/bcel/internal/classfile/ConstantPool.java
/*
* Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*
* 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 com.sun.org.apache.bcel.internal.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import com.sun.org.apache.bcel.internal.Const;
/**
* This class represents the constant pool, i.e., a table of constants, of
* a parsed classfile. It may contain null references, due to the JVM
* specification that skips an entry after an 8-byte constant (double,
* long) entry. Those interested in generating constant pools
* programatically should see <a href="../generic/ConstantPoolGen.html">
* ConstantPoolGen</a>.
* @version $Id: ConstantPool.java 1749603 2016-06-21 20:50:19Z ggregory $
* @see Constant
* @see com.sun.org.apache.bcel.internal.generic.ConstantPoolGen
*/
public class ConstantPool implements Cloneable, Node {
private Constant[] constant_pool;
/**
* @param constant_pool Array of constants
*/
public ConstantPool(final Constant[] constant_pool) {
this.constant_pool = constant_pool;
}
/**
* Read constants from given input stream.
*
* @param input Input stream
* @throws IOException
* @throws ClassFormatException
*/
public ConstantPool(final DataInput input) throws IOException, ClassFormatException {
byte tag;
final int constant_pool_count = input.readUnsignedShort();
constant_pool = new Constant[constant_pool_count];
/* constant_pool[0] is unused by the compiler and may be used freely
* by the implementation.
*/
for (int i = 1; i < constant_pool_count; i++) {
constant_pool[i] = Constant.readConstant(input);
/* Quote from the JVM specification:
* "All eight byte constants take up two spots in the constant pool.
* If this is the n'th byte in the constant pool, then the next item
* will be numbered n+2"
*
* Thus we have to increment the index counter.
*/
tag = constant_pool[i].getTag();
if ((tag == Const.CONSTANT_Double) || (tag == Const.CONSTANT_Long)) {
i++;
}
}
}
/**
* Called by objects that are traversing the nodes of the tree implicitely
* defined by the contents of a Java class. I.e., the hierarchy of methods,
* fields, attributes, etc. spawns a tree of objects.
*
* @param v Visitor object
*/
@Override
public void accept( final Visitor v ) {
v.visitConstantPool(this);
}
/**
* Resolve constant to a string representation.
*
* @param c Constant to be printed
* @return String representation
*/
public String constantToString( Constant c ) throws ClassFormatException {
String str;
int i;
final byte tag = c.getTag();
switch (tag) {
case Const.CONSTANT_Class:
i = ((ConstantClass) c).getNameIndex();
c = getConstant(i, Const.CONSTANT_Utf8);
str = Utility.compactClassName(((ConstantUtf8) c).getBytes(), false);
break;
case Const.CONSTANT_String:
i = ((ConstantString) c).getStringIndex();
c = getConstant(i, Const.CONSTANT_Utf8);
str = "\"" + escape(((ConstantUtf8) c).getBytes()) + "\"";
break;
case Const.CONSTANT_Utf8:
str = ((ConstantUtf8) c).getBytes();
break;
case Const.CONSTANT_Double:
str = String.valueOf(((ConstantDouble) c).getBytes());
break;
case Const.CONSTANT_Float:
str = String.valueOf(((ConstantFloat) c).getBytes());
break;
case Const.CONSTANT_Long:
str = String.valueOf(((ConstantLong) c).getBytes());
break;
case Const.CONSTANT_Integer:
str = String.valueOf(((ConstantInteger) c).getBytes());
break;
case Const.CONSTANT_NameAndType:
str = constantToString(((ConstantNameAndType) c).getNameIndex(),
Const.CONSTANT_Utf8)
+ ":" + constantToString(((ConstantNameAndType) c).getSignatureIndex(),
Const.CONSTANT_Utf8);
break;
case Const.CONSTANT_InterfaceMethodref:
case Const.CONSTANT_Methodref:
case Const.CONSTANT_Fieldref:
str = constantToString(((ConstantCP) c).getClassIndex(), Const.CONSTANT_Class)
+ "." + constantToString(((ConstantCP) c).getNameAndTypeIndex(),
Const.CONSTANT_NameAndType);
break;
case Const.CONSTANT_MethodHandle:
// Note that the ReferenceIndex may point to a Fieldref, Methodref or
// InterfaceMethodref - so we need to peek ahead to get the actual type.
final ConstantMethodHandle cmh = (ConstantMethodHandle) c;
str = Const.getMethodHandleName(cmh.getReferenceKind())
+ " " + constantToString(cmh.getReferenceIndex(),
getConstant(cmh.getReferenceIndex()).getTag());
break;
case Const.CONSTANT_MethodType:
final ConstantMethodType cmt = (ConstantMethodType) c;
str = constantToString(cmt.getDescriptorIndex(), Const.CONSTANT_Utf8);
break;
case Const.CONSTANT_InvokeDynamic:
final ConstantInvokeDynamic cid = (ConstantInvokeDynamic) c;
str = cid.getBootstrapMethodAttrIndex()
+ ":" + constantToString(cid.getNameAndTypeIndex(),
Const.CONSTANT_NameAndType);
break;
default: // Never reached
throw new RuntimeException("Unknown constant type " + tag);
}
return str;
}
private static String escape( final String str ) {
final int len = str.length();
final StringBuilder buf = new StringBuilder(len + 5);
final char[] ch = str.toCharArray();
for (int i = 0; i < len; i++) {
switch (ch[i]) {
case '\n':
buf.append("\\n");
break;
case '\r':
buf.append("\\r");
break;
case '\t':
buf.append("\\t");
break;
case '\b':
buf.append("\\b");
break;
case '"':
buf.append("\\\"");
break;
default:
buf.append(ch[i]);
}
}
return buf.toString();
}
/**
* Retrieve constant at `index' from constant pool and resolve it to
* a string representation.
*
* @param index of constant in constant pool
* @param tag expected type
* @return String representation
*/
public String constantToString( final int index, final byte tag ) throws ClassFormatException {
final Constant c = getConstant(index, tag);
return constantToString(c);
}
/**
* Dump constant pool to file stream in binary format.
*
* @param file Output file stream
* @throws IOException
*/
public void dump( final DataOutputStream file ) throws IOException {
file.writeShort(constant_pool.length);
for (int i = 1; i < constant_pool.length; i++) {
if (constant_pool[i] != null) {
constant_pool[i].dump(file);
}
}
}
/**
* Get constant from constant pool.
*
* @param index Index in constant pool
* @return Constant value
* @see Constant
*/
public Constant getConstant( final int index ) {
if (index >= constant_pool.length || index < 0) {
throw new ClassFormatException("Invalid constant pool reference: " + index
+ ". Constant pool size is: " + constant_pool.length);
}
return constant_pool[index];
}
/**
* Get constant from constant pool and check whether it has the
* expected type.
*
* @param index Index in constant pool
* @param tag Tag of expected constant, i.e., its type
* @return Constant value
* @see Constant
* @throws ClassFormatException
*/
public Constant getConstant( final int index, final byte tag ) throws ClassFormatException {
Constant c;
c = getConstant(index);
if (c == null) {
throw new ClassFormatException("Constant pool at index " + index + " is null.");
}
if (c.getTag() != tag) {
throw new ClassFormatException("Expected class `" + Const.getConstantName(tag)
+ "' at index " + index + " and got " + c);
}
return c;
}
/**
* @return Array of constants.
* @see Constant
*/
public Constant[] getConstantPool() {
return constant_pool;
}
/**
* Get string from constant pool and bypass the indirection of
* `ConstantClass' and `ConstantString' objects. I.e. these classes have
* an index field that points to another entry of the constant pool of
* type `ConstantUtf8' which contains the real data.
*
* @param index Index in constant pool
* @param tag Tag of expected constant, either ConstantClass or ConstantString
* @return Contents of string reference
* @see ConstantClass
* @see ConstantString
* @throws ClassFormatException
*/
public String getConstantString( final int index, final byte tag ) throws ClassFormatException {
Constant c;
int i;
c = getConstant(index, tag);
/* This switch() is not that elegant, since the two classes have the
* same contents, they just differ in the name of the index
* field variable.
* But we want to stick to the JVM naming conventions closely though
* we could have solved these more elegantly by using the same
* variable name or by subclassing.
*/
switch (tag) {
case Const.CONSTANT_Class:
i = ((ConstantClass) c).getNameIndex();
break;
case Const.CONSTANT_String:
i = ((ConstantString) c).getStringIndex();
break;
default:
throw new RuntimeException("getConstantString called with illegal tag " + tag);
}
// Finally get the string from the constant pool
c = getConstant(i, Const.CONSTANT_Utf8);
return ((ConstantUtf8) c).getBytes();
}
/**
* @return Length of constant pool.
*/
public int getLength() {
return constant_pool == null ? 0 : constant_pool.length;
}
/**
* @param constant Constant to set
*/
public void setConstant( final int index, final Constant constant ) {
constant_pool[index] = constant;
}
/**
* @param constant_pool
*/
public void setConstantPool( final Constant[] constant_pool ) {
this.constant_pool = constant_pool;
}
/**
* @return String representation.
*/
@Override
public String toString() {
final StringBuilder buf = new StringBuilder();
for (int i = 1; i < constant_pool.length; i++) {
buf.append(i).append(")").append(constant_pool[i]).append("\n");
}
return buf.toString();
}
/**
* @return deep copy of this constant pool
*/
public ConstantPool copy() {
ConstantPool c = null;
try {
c = (ConstantPool) clone();
c.constant_pool = new Constant[constant_pool.length];
for (int i = 1; i < constant_pool.length; i++) {
if (constant_pool[i] != null) {
c.constant_pool[i] = constant_pool[i].copy();
}
}
} catch (final CloneNotSupportedException e) {
// TODO should this throw?
}
return c;
}
}
⏎ com/sun/org/apache/bcel/internal/classfile/ConstantPool.java
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