JavaClassHelper.java
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|---|---|---|
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com.espertech.esper.util |
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Esper |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| COMPARISONS | Number of comparison operators |  |
| RETURNS | Number of return points from functions | |
| CYCLOMATIC | Cyclomatic complexity | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| BLOCKS | Number of blocks | |
| LOC | Lines of code | |
| SIZE | Size of the file in bytes | |
| OPERATORS | Number of operators | |
| LINES | Number of lines in the source file | |
| PROGRAM_LENGTH | Halstead program length | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| ELOC | Effective lines of code | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| DOC_COMMENT | Number of javadoc comment lines | |
| DECL_COMMENTS | Comments in declarations | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| OPERANDS | Number of operands | |
| LOGICAL_LINES | Number of statements | |
| EXITS | Procedure exits | |
| PARAMS | Number of formal parameter declarations | |
| COMMENTS | Comment lines | |
| LOOPS | Number of loops | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| UNIQUE_OPERATORS | Number of unique operators | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/**************************************************************************************
* Copyright (C) 2006 Esper Team. All rights reserved. *
* http://esper.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.util;
import com.espertech.esper.event.EventAdapterException;
import com.espertech.esper.type.*;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
/**
* Helper for questions about Java classes such as
* <p> what is the boxed type for a primitive type
* <p> is this a numeric type.
*/
public class JavaClassHelper
{
/**
* Returns the boxed class for the given class, or the class itself if already boxed or not a primitive type.
* For primitive unboxed types returns the boxed types, e.g. returns java.lang.Integer for passing int.class.
* For any other class, returns the class passed.
* @param clazz is the class to return the boxed class for
* @return boxed variant of the same class
*/
public static Class getBoxedType(Class clazz)
{
if (clazz == boolean.class)
{
return Boolean.class;
}
if (clazz == char.class)
{
return Character.class;
}
if (clazz == double.class)
{
return Double.class;
}
if (clazz == float.class)
{
return Float.class;
}
if (clazz == byte.class)
{
return Byte.class;
}
if (clazz == short.class)
{
return Short.class;
}
if (clazz == int.class)
{
return Integer.class;
}
if (clazz == long.class)
{
return Long.class;
}
return clazz;
}
/**
* Returns a comma-separated parameter type list in readable form,
* considering arrays and null-type parameters.
* @param parameters is the parameter types to render
* @return rendered list of parameters
*/
public static String getParameterAsString(Class[] parameters)
{
StringBuilder builder = new StringBuilder();
String delimiterComma = ", ";
String delimiter = "";
for (Class param : parameters)
{
builder.append(delimiter);
builder.append(getParameterAsString(param));
delimiter = delimiterComma;
}
return builder.toString();
}
/**
* Returns a parameter as a string text, allowing null values to represent a null
* select expression type.
* @param param is the parameter type
* @return string representation of parameter
*/
public static String getParameterAsString(Class param)
{
if (param == null)
{
return "null (any type)";
}
return param.getSimpleName();
}
/**
* Returns the un-boxed class for the given class, or the class itself if already un-boxed or not a primitive type.
* For primitive boxed types returns the unboxed primitive type, e.g. returns int.class for passing Integer.class.
* For any other class, returns the class passed.
* @param clazz is the class to return the unboxed (or primitive) class for
* @return primitive variant of the same class
*/
public static Class getPrimitiveType(Class clazz)
{
if (clazz == Boolean.class)
{
return boolean.class;
}
if (clazz == Character.class)
{
return char.class;
}
if (clazz == Double.class)
{
return double.class;
}
if (clazz == Float.class)
{
return float.class;
}
if (clazz == Byte.class)
{
return byte.class;
}
if (clazz == Short.class)
{
return short.class;
}
if (clazz == Integer.class)
{
return int.class;
}
if (clazz == Long.class)
{
return long.class;
}
return clazz;
}
/**
* Determines if the class passed in is one of the numeric classes.
* @param clazz to check
* @return true if numeric, false if not
*/
public static boolean isNumeric(Class clazz)
{
if ((clazz == Double.class) ||
(clazz == double.class) ||
(clazz == Float.class) ||
(clazz == float.class) ||
(clazz == Short.class) ||
(clazz == short.class) ||
(clazz == Integer.class) ||
(clazz == int.class) ||
(clazz == Long.class) ||
(clazz == long.class) ||
(clazz == Byte.class) ||
(clazz == byte.class))
{
return true;
}
return false;
}
/**
* Determines if the class passed in is one of the numeric classes and not a floating point.
* @param clazz to check
* @return true if numeric and not a floating point, false if not
*/
public static boolean isNumericNonFP(Class clazz)
{
if ((clazz == Short.class) ||
(clazz == short.class) ||
(clazz == Integer.class) ||
(clazz == int.class) ||
(clazz == Long.class) ||
(clazz == long.class) ||
(clazz == Byte.class) ||
(clazz == byte.class))
{
return true;
}
return false;
}
/**
* Returns true if 2 classes are assignment compatible.
* @param invocationType type to assign from
* @param declarationType type to assign to
* @return true if assignment compatible, false if not
*/
public static boolean isAssignmentCompatible(Class invocationType, Class declarationType)
{
if (invocationType == null)
{
return true;
}
if (declarationType.isAssignableFrom(invocationType))
{
return true;
}
if (declarationType.isPrimitive())
{
Class parameterWrapperClazz = getBoxedType(declarationType);
if (parameterWrapperClazz != null)
{
if (parameterWrapperClazz.equals(invocationType))
{
return true;
}
}
}
if (getBoxedType(invocationType) == declarationType)
{
return true;
}
Set<Class> widenings = MethodResolver.getWideningConversions().get(declarationType);
if (widenings != null)
{
return widenings.contains(invocationType);
}
if (declarationType.isInterface())
{
if (isImplementsInterface(invocationType, declarationType))
{
return true;
}
}
return recursiveIsSuperClass(invocationType, declarationType);
}
/**
* Determines if the class passed in is a boolean boxed or unboxed type.
* @param clazz to check
* @return true if boolean, false if not
*/
public static boolean isBoolean(Class clazz)
{
if ((clazz == Boolean.class) ||
(clazz == boolean.class))
{
return true;
}
return false;
}
/**
* Returns the coercion type for the 2 numeric types for use in arithmatic.
* Note: byte and short types always result in integer.
* @param typeOne is the first type
* @param typeTwo is the second type
* @return coerced type
* @throws CoercionException if types don't allow coercion
*/
public static Class getArithmaticCoercionType(Class typeOne, Class typeTwo)
throws CoercionException
{
Class boxedOne = getBoxedType(typeOne);
Class boxedTwo = getBoxedType(typeTwo);
if (!isNumeric(boxedOne) || !isNumeric(boxedTwo))
{
throw new CoercionException("Cannot coerce types " + typeOne.getName() + " and " + typeTwo.getName());
}
if ((boxedOne == Double.class) || (boxedTwo == Double.class))
{
return Double.class;
}
if ((boxedOne == Float.class) || (boxedTwo == Float.class))
{
return Float.class;
}
if ((boxedOne == Long.class) || (boxedTwo == Long.class))
{
return Long.class;
}
return Integer.class;
}
/**
* Coerce the given number to the given type, assuming the type is a Boxed type. Allows coerce to lower resultion number.
* Does't coerce to primitive types.
* @param numToCoerce is the number to coerce to the given type
* @param resultBoxedType is the boxed result type to return
* @return the numToCoerce as a value in the given result type
*/
public static Number coerceBoxed(Number numToCoerce, Class resultBoxedType)
{
if (numToCoerce.getClass() == resultBoxedType)
{
return numToCoerce;
}
if (resultBoxedType == Double.class)
{
return numToCoerce.doubleValue();
}
if (resultBoxedType == Long.class)
{
return numToCoerce.longValue();
}
if (resultBoxedType == Float.class)
{
return numToCoerce.floatValue();
}
if (resultBoxedType == Integer.class)
{
return numToCoerce.intValue();
}
if (resultBoxedType == Short.class)
{
return numToCoerce.shortValue();
}
if (resultBoxedType == Byte.class)
{
return numToCoerce.byteValue();
}
throw new IllegalArgumentException("Cannot coerce to number subtype " + resultBoxedType.getName());
}
/**
* Returns true if the Number instance is a floating point number.
* @param number to check
* @return true if number is Float or Double type
*/
public static boolean isFloatingPointNumber(Number number)
{
if ((number instanceof Float) ||
(number instanceof Double))
{
return true;
}
return false;
}
/**
* Returns true if the supplied type is a floating point number.
* @param clazz to check
* @return true if primitive or boxed float or double
*/
public static boolean isFloatingPointClass(Class clazz)
{
if ((clazz == Float.class) ||
(clazz == Double.class) ||
(clazz == float.class) ||
(clazz == double.class))
{
return true;
}
return false;
}
/**
* Returns for 2 classes to be compared via relational operator the Class type of
* common comparison. The output is always Long.class, Double.class, String.class or Boolean.class
* depending on whether the passed types are numeric and floating-point.
* Accepts primitive as well as boxed types.
* @param typeOne is the first type
* @param typeTwo is the second type
* @return One of Long.class, Double.class or String.class
* @throws IllegalArgumentException if the types cannot be compared
*/
public static Class getCompareToCoercionType(Class typeOne, Class typeTwo)
{
if ((typeOne == String.class) && (typeTwo == String.class))
{
return String.class;
}
if ( ((typeOne == boolean.class) || ((typeOne == Boolean.class))) &&
((typeTwo == boolean.class) || ((typeTwo == Boolean.class))) )
{
return Boolean.class;
}
if (!isNumeric(typeOne) || !isNumeric(typeTwo))
{
throw new IllegalArgumentException("Types cannot be compared: " +
typeOne.getName() + " and " + typeTwo.getName());
}
if (isFloatingPointClass(typeOne) || isFloatingPointClass(typeTwo))
{
return Double.class;
}
return Long.class;
}
/**
* Determines if a number can be coerced upwards to another number class without loss.
* <p>
* Clients must pass in two classes that are numeric types.
* <p>
* Any number class can be coerced to double, while only double cannot be coerced to float.
* Any non-floating point number can be coerced to long.
* Integer can be coerced to Byte and Short even though loss is possible, for convenience.
* @param numberClassToBeCoerced the number class to be coerced
* @param numberClassToCoerceTo the number class to coerce to
* @return true if numbers can be coerced without loss, false if not
*/
public static boolean canCoerce(Class numberClassToBeCoerced, Class numberClassToCoerceTo)
{
Class boxedFrom = getBoxedType(numberClassToBeCoerced);
Class boxedTo = getBoxedType(numberClassToCoerceTo);
if (!isNumeric(numberClassToBeCoerced))
{
throw new IllegalArgumentException("Class '" + numberClassToBeCoerced + "' is not a numeric type'");
}
if (boxedTo == Float.class)
{
return ((boxedFrom == Byte.class) ||
(boxedFrom == Short.class) ||
(boxedFrom == Integer.class) ||
(boxedFrom == Long.class) ||
(boxedFrom == Float.class));
}
else if (boxedTo == Double.class)
{
return ((boxedFrom == Byte.class) ||
(boxedFrom == Short.class) ||
(boxedFrom == Integer.class) ||
(boxedFrom == Long.class) ||
(boxedFrom == Float.class) ||
(boxedFrom == Double.class));
}
else if (boxedTo == Long.class)
{
return ((boxedFrom == Byte.class) ||
(boxedFrom == Short.class) ||
(boxedFrom == Integer.class) ||
(boxedFrom == Long.class));
}
else if ((boxedTo == Integer.class) ||
(boxedTo == Short.class) ||
(boxedTo == Byte.class))
{
return ((boxedFrom == Byte.class) ||
(boxedFrom == Short.class) ||
(boxedFrom == Integer.class));
}
else
{
throw new IllegalArgumentException("Class '" + numberClassToCoerceTo + "' is not a numeric type'");
}
}
/**
* Returns for the class name given the class name of the boxed (wrapped) type if
* the class name is one of the Java primitive types.
* @param className is a class name, a Java primitive type or other class
* @return boxed class name if Java primitive type, or just same class name passed in if not a primitive type
*/
public static String getBoxedClassName(String className)
{
if (className.equals(char.class.getName()))
{
return Character.class.getName();
}
if (className.equals(byte.class.getName()))
{
return Byte.class.getName();
}
if (className.equals(short.class.getName()))
{
return Short.class.getName();
}
if (className.equals(int.class.getName()))
{
return Integer.class.getName();
}
if (className.equals(long.class.getName()))
{
return Long.class.getName();
}
if (className.equals(float.class.getName()))
{
return Float.class.getName();
}
if (className.equals(double.class.getName()))
{
return Double.class.getName();
}
if (className.equals(boolean.class.getName()))
{
return Boolean.class.getName();
}
return className;
}
/**
* Returns true if the class passed in is a Java built-in data type (primitive or wrapper) including String.
* @param clazz to check
* @return true if built-in data type, or false if not
*/
public static boolean isJavaBuiltinDataType(Class clazz)
{
Class clazzBoxed = getBoxedType(clazz);
if (isNumeric(clazzBoxed))
{
return true;
}
if (isBoolean(clazzBoxed))
{
return true;
}
if (clazzBoxed.equals(String.class))
{
return true;
}
if ((clazzBoxed.equals(char.class)) ||
(clazzBoxed.equals(Character.class)))
{
return true;
}
return false;
}
// null values are allowed and represent and unknown type
/**
* Determines a common denominator type to which one or more types can be casted or coerced.
* For use in determining the result type in certain expressions (coalesce, case).
* <p>
* Null values are allowed as part of the input and indicate a 'null' constant value
* in an expression tree. Such as value doesn't have any type and can be ignored in
* determining a result type.
* <p>
* For numeric types, determines a coercion type that all types can be converted to
* via the method getArithmaticCoercionType.
* <p>
* Indicates that there is no common denominator type by throwing {@link CoercionException}.
* @param types is an array of one or more types, which can be Java built-in (primitive or wrapper)
* or user types
* @return common denominator type if any can be found, for use in comparison
* @throws CoercionException when no coercion type could be determined
*/
public static Class getCommonCoercionType(Class[] types)
throws CoercionException
{
if (types.length < 1)
{
throw new IllegalArgumentException("Unexpected zero length array");
}
if (types.length == 1)
{
return getBoxedType(types[0]);
}
// Reduce to non-null types
List<Class> nonNullTypes = new LinkedList<Class>();
for (int i = 0; i < types.length; i++)
{
if (types[i] != null)
{
nonNullTypes.add(types[i]);
}
}
types = nonNullTypes.toArray(new Class[0]);
if (types.length == 0)
{
return null; // only null types, result is null
}
if (types.length == 1)
{
return getBoxedType(types[0]);
}
// Check if all String
if (types[0] == String.class)
{
for (int i = 0; i < types.length; i++)
{
if (types[i] != String.class)
{
throw new CoercionException("Cannot coerce to String type " + types[i].getName());
}
}
return String.class;
}
// Convert to boxed types
for (int i = 0; i < types.length; i++)
{
types[i] = getBoxedType(types[i]);
}
// Check if all boolean
if (types[0] == Boolean.class)
{
for (int i = 0; i < types.length; i++)
{
if (types[i] != Boolean.class)
{
throw new CoercionException("Cannot coerce to Boolean type " + types[i].getName());
}
}
return Boolean.class;
}
// Check if all char
if (types[0] == Character.class)
{
for (int i = 0; i < types.length; i++)
{
if (types[i] != Character.class)
{
throw new CoercionException("Cannot coerce to Boolean type " + types[i].getName());
}
}
return Character.class;
}
// Check if all the same non-Java builtin type, i.e. Java beans etc.
if (!isJavaBuiltinDataType(types[0]))
{
for (int i = 0; i < types.length; i++)
{
if (types[i] != types[0])
{
throw new CoercionException("Cannot coerce to type " + types[0].getName());
}
}
return types[0];
}
// Test for numeric
if (!isNumeric(types[0]))
{
throw new CoercionException("Cannot coerce to numeric type " + types[0].getName());
}
// Use arithmatic coercion type as the final authority, considering all types
Class result = getArithmaticCoercionType(types[0], types[1]);
int count = 2;
while(count < types.length)
{
result = getArithmaticCoercionType(result, types[count]);
count++;
}
return result;
}
/**
* Returns the class given a fully-qualified class name.
* @param className is the fully-qualified class name, java primitive types included.
* @return class for name
* @throws ClassNotFoundException if the class cannot be found
*/
public static Class getClassForName(String className) throws ClassNotFoundException
{
if (className.equals(boolean.class.getName()))
{
return boolean.class;
}
if (className.equals(char.class.getName()))
{
return char.class;
}
if (className.equals(double.class.getName()))
{
return double.class;
}
if (className.equals(float.class.getName()))
{
return float.class;
}
if (className.equals(byte.class.getName()))
{
return byte.class;
}
if (className.equals(short.class.getName()))
{
return short.class;
}
if (className.equals(int.class.getName()))
{
return int.class;
}
if (className.equals(long.class.getName()))
{
return long.class;
}
return Class.forName(className);
}
/**
* Returns the boxed class for the given classname, recognizing all primitive and abbreviations,
* uppercase and lowercase.
* <p>
* Recognizes "int" as Integer.class and "strIng" as String.class, and "Integer" as Integer.class, and so on.
* @param className is the name to recognize
* @return class
* @throws EventAdapterException is throw if the class cannot be identified
*/
public static Class getClassForSimpleName(String className)
throws EventAdapterException
{
if (("string".equals(className.toLowerCase().trim())) ||
("varchar".equals(className.toLowerCase().trim())) ||
("varchar2".equals(className.toLowerCase().trim())))
{
return String.class;
}
if ("integer".equals(className.toLowerCase().trim()))
{
return Integer.class;
}
if ("bool".equals(className.toLowerCase().trim()))
{
return Boolean.class;
}
if ("character".equals(className.toLowerCase().trim()))
{
return Character.class;
}
// use the boxed type for primitives
String boxedClassName = JavaClassHelper.getBoxedClassName(className.trim());
try
{
return Class.forName(boxedClassName);
}
catch (ClassNotFoundException ex)
{
}
boxedClassName = JavaClassHelper.getBoxedClassName(className.toLowerCase().trim());
try
{
return Class.forName(boxedClassName);
}
catch (ClassNotFoundException ex)
{
throw new EventAdapterException("Unable to load class '" + boxedClassName + "', class not found", ex);
}
}
/**
* Returns the class for a Java primitive type name, ignoring case, and considering String as a primitive.
* @param typeName is a potential primitive Java type, or some other type name
* @return class for primitive type name, or null if not a primitive type.
*/
public static Class getPrimitiveClassForName(String typeName)
{
typeName = typeName.toLowerCase();
if (typeName.equals("boolean"))
{
return boolean.class;
}
if (typeName.equals("char"))
{
return char.class;
}
if (typeName.equals("double"))
{
return double.class;
}
if (typeName.equals("float"))
{
return float.class;
}
if (typeName.equals("byte"))
{
return byte.class;
}
if (typeName.equals("short"))
{
return short.class;
}
if (typeName.equals("int"))
{
return int.class;
}
if (typeName.equals("long"))
{
return long.class;
}
if (typeName.equals("string"))
{
return String.class;
}
return null;
}
/**
* Parse the String using the given Java built-in class for parsing.
* @param clazz is the class to parse the value to
* @param text is the text to parse
* @return value matching the type passed in
*/
public static Object parse(Class clazz, String text)
{
Class classBoxed = JavaClassHelper.getBoxedType(clazz);
if (classBoxed == String.class)
{
return text;
}
if (classBoxed == Character.class)
{
return text.charAt(0);
}
if (classBoxed == Boolean.class)
{
return BoolValue.parseString(text.toLowerCase().trim());
}
if (classBoxed == Byte.class)
{
return ByteValue.parseString(text.trim());
}
if (classBoxed == Short.class)
{
return ShortValue.parseString(text.trim());
}
if (classBoxed == Long.class)
{
return LongValue.parseString(text.trim());
}
if (classBoxed == Float.class)
{
return FloatValue.parseString(text.trim());
}
if (classBoxed == Double.class)
{
return DoubleValue.parseString(text.trim());
}
if (classBoxed == Integer.class)
{
return IntValue.parseString(text.trim());
}
return null;
}
/**
* Method to check if a given class, and its superclasses and interfaces (deep), implement a given interface.
* @param clazz to check, including all its superclasses and their interfaces and extends
* @param interfaceClass is the interface class to look for
* @return true if such interface is implemented by any of the clazz or its superclasses or
* extends by any interface and superclasses (deep check)
*/
public static boolean isImplementsInterface(Class clazz, Class interfaceClass)
{
if (!(interfaceClass.isInterface()))
{
throw new IllegalArgumentException("Interface class passed in is not an interface");
}
boolean resultThisClass = recursiveIsImplementsInterface(clazz, interfaceClass);
if (resultThisClass)
{
return true;
}
return recursiveSuperclassImplementsInterface(clazz, interfaceClass);
}
private static boolean recursiveIsSuperClass(Class clazz, Class superClass)
{
if (clazz == null)
{
return false;
}
if (clazz.isPrimitive())
{
return false;
}
Class mySuperClass = clazz.getSuperclass();
if (mySuperClass == superClass)
{
return true;
}
if (mySuperClass == Object.class)
{
return false;
}
return recursiveIsSuperClass(mySuperClass, superClass);
}
private static boolean recursiveSuperclassImplementsInterface(Class clazz, Class interfaceClass)
{
Class superClass = clazz.getSuperclass();
if ((superClass == null) || (superClass == Object.class))
{
return false;
}
boolean result = recursiveIsImplementsInterface(superClass, interfaceClass);
if (result)
{
return result;
}
return recursiveSuperclassImplementsInterface(superClass, interfaceClass);
}
private static boolean recursiveIsImplementsInterface(Class clazz, Class interfaceClass)
{
if (clazz == interfaceClass)
{
return true;
}
Class[] interfaces = clazz.getInterfaces();
if (interfaces == null)
{
return false;
}
for (Class classToCheck : interfaces)
{
boolean result = recursiveIsImplementsInterface(classToCheck, interfaceClass);
if (result)
{
return result;
}
}
return false;
}
}
The table below shows all metrics for JavaClassHelper.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 157.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 177.00 | Comment lines | |
| COMMENT_DENSITY | 0.46 | Comment density | |
| COMPARISONS | 187.00 | Number of comparison operators | |
| CYCLOMATIC | 175.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 25.00 | Comments in declarations | |
| DOC_COMMENT | 167.00 | Number of javadoc comment lines | |
| ELOC | 383.00 | Effective lines of code | |
| EXEC_COMMENTS | 9.00 | Comments in executable code | |
| EXITS | 54.00 | Procedure exits | |
| FUNCTIONS | 25.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 103.77 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 179.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 1.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 1.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 3.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 0.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 5.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 931.00 | Number of lines in the source file | |
| LINE_COMMENT | 10.00 | Number of line comments | |
| LOC | 699.00 | Lines of code | |
| LOGICAL_LINES | 190.00 | Number of statements | |
| LOOPS | 7.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 881.00 | Number of operands | |
| OPERATORS | 2649.00 | Number of operators | |
| PARAMS | 35.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 3530.00 | Halstead program length | |
| PROGRAM_VOCAB | 257.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 144.00 | Number of return points from functions | |
| SIZE | 30297.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 208.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 49.00 | Number of unique operators | |
| WHITESPACE | 55.00 | Number of whitespace lines | |