com.sun.jdo.api.persistence.enhancer.classfile.ExceptionRange Maven / Gradle / Ivy
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package com.sun.jdo.api.persistence.enhancer.classfile;
import java.io.*;
/**
* ExceptionRange represents a range an exception handler within
* a method in class file.
*/
public class ExceptionRange {
/* The start of the exception hander (inclusive) */
private InsnTarget excStartPC;
/* The end of the exception hander (exclusive) */
private InsnTarget excEndPC;
/* The exception handler code */
private InsnTarget excHandlerPC;
/* The exception specification */
private ConstClass excCatchType;
/* public accessors */
/**
* return the start of the exception hander (inclusive)
*/
public InsnTarget startPC() {
return excStartPC;
}
/**
* return the end of the exception hander (exclusive)
*/
public InsnTarget endPC() {
return excEndPC;
}
/**
* return the exception handler code
*/
public InsnTarget handlerPC() {
return excHandlerPC;
}
/**
* return the exception specification
* a null return value means a catch of any (try/finally)
*/
public ConstClass catchType() {
return excCatchType;
}
/**
* constructor
*/
public ExceptionRange(InsnTarget startPC, InsnTarget endPC,
InsnTarget handlerPC, ConstClass catchType) {
excStartPC = startPC;
excEndPC = endPC;
excHandlerPC = handlerPC;
excCatchType = catchType;
}
/* package local methods */
static ExceptionRange read(DataInputStream data, CodeEnv env)
throws IOException {
InsnTarget startPC = env.getTarget(data.readUnsignedShort());
InsnTarget endPC = env.getTarget(data.readUnsignedShort());
InsnTarget handlerPC = env.getTarget(data.readUnsignedShort());
ConstClass catchType =
(ConstClass) env.pool().constantAt(data.readUnsignedShort());
return new ExceptionRange(startPC, endPC, handlerPC, catchType);
}
void write(DataOutputStream out) throws IOException {
out.writeShort(excStartPC.offset());
out.writeShort(excEndPC.offset());
out.writeShort(excHandlerPC.offset());
out.writeShort(excCatchType == null ? 0 : excCatchType.getIndex());
}
void print(PrintStream out, int indent) {
ClassPrint.spaces(out, indent);
out.print("Exc Range:");//NOI18N
if (excCatchType == null)
out.print("any");//NOI18N
else
out.print("'" + excCatchType.asString() + "'");//NOI18N
out.print(" start = " + Integer.toString(excStartPC.offset()));//NOI18N
out.print(" end = " + Integer.toString(excEndPC.offset()));//NOI18N
out.println(" handle = " + Integer.toString(excHandlerPC.offset()));//NOI18N
}
}