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API doc

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This commit is contained in:
Volker Berlin 2020-01-26 12:39:00 +01:00
parent 43b41d4fad
commit f64ed4feee
2 changed files with 46 additions and 58 deletions
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5
src/de/inetsoftware/classparser/ClassFile.java
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@ -226,6 +226,11 @@ public class ClassFile {
return bootstrapMethods[methodIdx];
}
/**
* Get the constant pool of the the current class.
*
* @return the constant pool
*/
public ConstantPool getConstantPool() {
return constantPool;
}

99
src/de/inetsoftware/classparser/Code.java
View File

@ -1,5 +1,5 @@
/*
Copyright 2011 - 2019 Volker Berlin (i-net software)
Copyright 2011 - 2020 Volker Berlin (i-net software)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -29,30 +29,32 @@ import de.inetsoftware.classparser.Attributes.AttributeInfo;
*/
public class Code {
private final ConstantPool constantPool;
private final ConstantPool constantPool;
private final int maxStack;
private final int maxStack;
private final int maxLocals;
private final int maxLocals;
private final byte[] codeData;
private final byte[] codeData;
private final TryCatchFinally[] exceptionTable;
private final Attributes attributes;
private final Attributes attributes;
private LineNumberTable lineNumberTable;
private LineNumberTable lineNumberTable;
private LocalVariableTable localVariableTable;
private LocalVariableTable localVariableTable;
/**
* The code of a method attribute.
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.3
* The code of a method attribute. http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.7.3
* http://docs.oracle.com/javase/specs/jvms/se5.0/html/ClassFile.doc.html#1546
*
* @param input
* the stream of the code attribute
* @param constantPool
* the ConstantPool of the class
* @throws IOException
* if an I/O error occurs
*/
Code( DataInputStream input, @Nonnull ConstantPool constantPool ) throws IOException {
this.constantPool = constantPool;
@ -68,19 +70,36 @@ public class Code {
attributes = new Attributes( input, constantPool );
}
/**
* Get the constant pool of this code.
*
* @return the ConstantPool of the class
*/
@Nonnull
public ConstantPool getConstantPool(){
public ConstantPool getConstantPool() {
return constantPool;
}
/**
* Get exception table of this code block.
*
* @return the table, can be empty
*/
@Nonnull
public TryCatchFinally[] getExceptionTable() {
return exceptionTable;
}
/**
* Get the line number table. is null if the code was optimized.
*
* @return the table or null
* @throws IOException
* if any I/O error occur
*/
@Nullable
public LineNumberTable getLineNumberTable() throws IOException {
if( lineNumberTable != null ){
if( lineNumberTable != null ) {
return lineNumberTable;
}
AttributeInfo data = attributes.get( "LineNumberTable" );
@ -98,8 +117,8 @@ public class Code {
* if any I/O error occur
*/
@Nullable
public LocalVariableTable getLocalVariableTable() throws IOException{
if( localVariableTable != null ){
public LocalVariableTable getLocalVariableTable() throws IOException {
if( localVariableTable != null ) {
return localVariableTable;
}
AttributeInfo data = attributes.get( "LocalVariableTable" );
@ -116,24 +135,15 @@ public class Code {
public int getFirstLineNr() throws IOException {
LineNumberTable table = getLineNumberTable();
if( table == null ){
if( table == null ) {
return -1;
} else {
return table.getMinLineNr();
}
}
public int getLastLineNr() throws IOException {
LineNumberTable table = getLineNumberTable();
if( table == null ){
return -1;
} else {
return table.getMaxLineNr();
}
}
/**
* Get the stream of Java Byte code instruction of this method.
* Get the stream of Java Byte code instruction of this method.
*
* @return the stream
*/
@ -141,39 +151,12 @@ public class Code {
return new CodeInputStream( codeData, 0, codeData.length, this );
}
public int getCodeSize(){
/**
* Get the last position of the code.
*
* @return the size.
*/
public int getCodeSize() {
return codeData.length;
}
public boolean startWithSuperInit( ConstantClass superClass ){
if( codeData.length >= 4 && codeData[0] == 0x2a && codeData[1] == (byte)0xb7) {
int idx = ((codeData[2] & 0xFF << 8)) + (codeData[3] & 0xFF);
ConstantMethodRef method = (ConstantMethodRef)constantPool.get( idx );
return method.getConstantClass() == superClass;
}
return false;
}
/**
* Check if the code only contains the default constructor code:
* <pre><code>
* super.&lt;init&gt;;
* return;
* </code></pre>
* In this case the constructor will not be printed
* @param superClass
* @return
*/
public boolean isSuperInitReturn( ConstantClass superClass ) {
if( codeData.length == 5 && codeData[0] == 0x2a && codeData[1] == (byte)0xb7 && codeData[4] == (byte)0xb1 ) {
int idx = ((codeData[2] & 0xFF << 8)) + (codeData[3] & 0xFF);
ConstantMethodRef method = (ConstantMethodRef)constantPool.get( idx );
return method.getConstantClass() == superClass;
}
return false;
}
public byte[] getCodeData() {
return codeData;
}
}