/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.classfile;
import java.io.IOException;
import java.io.StringWriter;
import org.eclipse.persistence.tools.workbench.utility.ClassTools;
import org.eclipse.persistence.tools.workbench.utility.classfile.tools.ClassFileDataInputStream;
import org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter;
/**
* This class models a line number:
* u2 start_pc;
* u2 line_number;
*
* See "The Java Virtual Machine Specification" Chapter 4.
*/
public class LineNumber {
private short startPC;
private short lineNumber;
/**
* Construct a line number from the specified stream
* of byte codes.
*/
LineNumber(ClassFileDataInputStream stream) throws IOException {
super();
this.initialize(stream);
}
void initialize(ClassFileDataInputStream stream) throws IOException {
this.startPC = stream.readU2();
this.lineNumber = stream.readU2();
}
public String displayString() {
StringWriter sw = new StringWriter(1000);
IndentingPrintWriter writer = new IndentingPrintWriter(sw);
this.displayStringOn(writer);
return sw.toString();
}
public void displayStringOn(IndentingPrintWriter writer) {
writer.print("line number: ");
writer.print(this.lineNumber);
writer.print(" PC start: ");
writer.println(this.startPC);
}
public short getStartPC() {
return this.startPC;
}
public short getLineNumber() {
return this.lineNumber;
}
public void accept(Visitor visitor) {
visitor.visit(this);
}
public String toString() {
return ClassTools.shortClassNameForObject(this) + '(' + this.lineNumber + ':' + this.startPC + ')';
}
}