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/*
* Copyright (c) 2013-2016, Parallel Universe Software Co. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 3.0
* as published by the Free Software Foundation.
*/
package co.paralleluniverse.common.util;
// import java.lang.reflect.Executable;
import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.util.Objects;
/**
*
* @author pron
*/
public class ExtendedStackTraceElement {
private final String declaringClassName;
private final String methodName;
private final String fileName;
private final int lineNumber;
private final int bci;
Class clazz;
Member /*Executable*/ method;
public ExtendedStackTraceElement(StackTraceElement ste) {
this(ste, null, null, -1);
}
public ExtendedStackTraceElement(StackTraceElement ste, Class clazz, Member method, int bci) {
this(ste.getClassName(), ste.getMethodName(), ste.getFileName(), ste.getLineNumber(), clazz, method, bci);
}
public ExtendedStackTraceElement(Class clazz, Method method, String fileName, int lineNumber, int bci) {
this(clazz.getName(), method.getName(), fileName, lineNumber, clazz, method, bci);
}
public ExtendedStackTraceElement(String declaringClassName, String methodName, String fileName, int lineNumber, Class clazz, Member method, int bci) {
Objects.requireNonNull(declaringClassName, "Declaring class is null");
Objects.requireNonNull(methodName, "Method name is null");
if (clazz != null && !declaringClassName.equals(clazz.getName()))
throw new IllegalArgumentException("Class name mismatch: " + declaringClassName + ", " + clazz.getName());
if (method != null && !methodName.equals(method.getName()))
throw new IllegalArgumentException("Method name mismatch: " + methodName + ", " + method.getName());
this.declaringClassName = declaringClassName;
this.methodName = methodName;
this.fileName = fileName;
this.lineNumber = lineNumber;
this.clazz = clazz;
this.bci = bci;
this.method = method;
}
/**
* Returns the name of the source file containing the execution point
* represented by this stack trace element. Generally, this corresponds
* to the {@code SourceFile} attribute of the relevant {@code class}
* file (as per The Java Virtual Machine Specification, Section
* 4.7.7). In some systems, the name may refer to some source code unit
* other than a file, such as an entry in source repository.
*
* @return the name of the file containing the execution point
* represented by this stack trace element, or {@code null} if
* this information is unavailable.
*/
public String getFileName() {
return fileName;
}
/**
* Returns the line number of the source line containing the execution
* point represented by this stack trace element. Generally, this is
* derived from the {@code LineNumberTable} attribute of the relevant
* {@code class} file (as per The Java Virtual Machine
* Specification, Section 4.7.8).
*
* @return the line number of the source line containing the execution
* point represented by this stack trace element, or a negative
* number if this information is unavailable.
*/
public int getLineNumber() {
return lineNumber;
}
/**
* Returns the fully qualified name of the class containing the
* execution point represented by this stack trace element.
*
* @return the fully qualified name of the {@code Class} containing
* the execution point represented by this stack trace element.
*/
public String getClassName() {
return declaringClassName;
}
/**
* Returns the name of the method containing the execution point
* represented by this stack trace element. If the execution point is
* contained in an instance or class initializer, this method will return
* the appropriate special method name, {@code } or
* {@code }, as per Section 3.9 of The Java Virtual
* Machine Specification.
*
* @return the name of the method containing the execution point
* represented by this stack trace element.
*/
public String getMethodName() {
return methodName;
}
/**
* Returns true if the method containing the execution point
* represented by this stack trace element is a native method.
*
* @return {@code true} if the method containing the execution point
* represented by this stack trace element is a native method.
*/
public boolean isNativeMethod() {
return lineNumber == -2;
}
public Class getDeclaringClass() {
return clazz;
}
public int getBytecodeIndex() {
return bci;
}
public Member getMethod() {
return method;
}
public StackTraceElement getStackTraceElement() {
return new StackTraceElement(declaringClassName, methodName, fileName, lineNumber);
}
@Override
public boolean equals(Object obj) {
if (obj == this)
return true;
if (!(obj instanceof ExtendedStackTraceElement))
return false;
ExtendedStackTraceElement e = (ExtendedStackTraceElement) obj;
return e.declaringClassName.equals(declaringClassName)
&& e.lineNumber == lineNumber
&& Objects.equals(methodName, e.methodName)
&& Objects.equals(fileName, e.fileName);
}
@Override
public int hashCode() {
int result = 31 * declaringClassName.hashCode() + methodName.hashCode();
result = 31 * result + Objects.hashCode(fileName);
result = 31 * result + lineNumber;
return result;
}
@Override
public String toString() {
return toString(method);
}
public String toString(Member m) {
final StringBuilder sb = new StringBuilder();
if (m != null)
sb.append(asString(m));
else
sb.append(getClassName()).append('.').append(methodName);
sb.append(' ');
if (isNativeMethod())
sb.append("(Native Method)");
else {
sb.append('(');
if (fileName != null) {
sb.append(fileName);
if (lineNumber >= 0)
sb.append(':').append(lineNumber);
} else
sb.append("Unknown Source");
if (bci >= 0)
sb.append(" bci: ").append(bci);
sb.append(')');
}
return sb.toString();
}
private static String asString(Member method) {
final StringBuilder sb = new StringBuilder();
sb.append(getTypeName(method.getDeclaringClass())) // .getTypeName()
.append('.')
.append(method.getName());
sb.append('(');
final Class[] paramTypes = getParameterTypes(method);
for (Class type : paramTypes)
sb.append(getTypeName(type)).append(','); //.getTypeName()
if (paramTypes.length > 0)
sb.delete(sb.length() - 1, sb.length()); // Remove last ','
sb.append(')');
// sb.append("): ");
// sb.append(getTypeName(getReturnType(method)));
return sb.toString();
}
private static Class[] getParameterTypes(Member m) {
if (m instanceof Constructor)
return ((Constructor) m).getParameterTypes();
else
return ((Method) m).getParameterTypes();
}
private static Class getReturnType(Member m) {
if (m instanceof Constructor)
return ((Constructor) m).getDeclaringClass();
else
return ((Method) m).getReturnType();
}
// In Java 8, replaced by Class.getTypeName()
private static String getTypeName(Class type) {
if (type.isArray()) {
try {
Class cl = type;
int dimensions = 0;
while (cl.isArray()) {
dimensions++;
cl = cl.getComponentType();
}
StringBuilder sb = new StringBuilder();
sb.append(cl.getName());
for (int i = 0; i < dimensions; i++) {
sb.append("[]");
}
return sb.toString();
} catch (Throwable e) { /*FALLTHRU*/ }
}
return type.getName();
}
}
