MethodUtils.java
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org.apache.commons.beanutils |
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Phex |
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 | |
|---|---|---|
| DOC_COMMENT | Number of javadoc comment lines |  |
| COMMENTS | Comment lines | |
| EXEC_COMMENTS | Comments in executable code | |
| SIZE | Size of the file in bytes | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| RETURNS | Number of return points from functions | |
| LINE_COMMENT | Number of line comments | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| DECL_COMMENTS | Comments in declarations | |
| LINES | Number of lines in the source file | |
| PARAMS | Number of formal parameter declarations | |
| COMPARISONS | Number of comparison operators | |
| JAVA0067 | JAVA0067 Array descriptor on identifier name | |
| BLOCKS | Number of blocks | |
| CYCLOMATIC | Cyclomatic complexity | |
| ELOC | Effective lines of code | |
| JAVA0049 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0163 | JAVA0163 Empty statement | |
| NEST_DEPTH | Maximum nesting depth | |
| LOC | Lines of code | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0128 | JAVA0128 Public constructor in non-public class | |
| OPERATORS | Number of operators | |
| PROGRAM_VOLUME | Halstead program volume | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0123 | JAVA0123 Use all three components of for loop | |
| PROGRAM_LENGTH | Halstead program length | |
| LOOPS | Number of loops | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.beanutils;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.WeakHashMap;
/**
* <p> Utility reflection methods focussed on methods in general rather than properties in particular. </p>
*
* <h3>Known Limitations</h3>
* <h4>Accessing Public Methods In A Default Access Superclass</h4>
* <p>There is an issue when invoking public methods contained in a default access superclass.
* Reflection locates these methods fine and correctly assigns them as public.
* However, an <code>IllegalAccessException</code> is thrown if the method is invoked.</p>
*
* <p><code>MethodUtils</code> contains a workaround for this situation.
* It will attempt to call <code>setAccessible</code> on this method.
* If this call succeeds, then the method can be invoked as normal.
* This call will only succeed when the application has sufficient security privilages.
* If this call fails then a warning will be logged and the method may fail.</p>
*
* @author Craig R. McClanahan
* @author Ralph Schaer
* @author Chris Audley
* @author Rey François
* @author Gregor Ra√Ωman
* @author Jan Sorensen
* @author Robert Burrell Donkin
*/
public class MethodUtils {
// --------------------------------------------------------- Private Methods
/** An empty class array */
private static final Class[] emptyClassArray = new Class[0];
/** An empty object array */
private static final Object[] emptyObjectArray = new Object[0];
/**
* Stores a cache of Methods against MethodDescriptors, in a WeakHashMap.
*/
private static WeakHashMap cache = new WeakHashMap();
// --------------------------------------------------------- Public Methods
/**
* <p>Invoke a named method whose parameter type matches the object type.</p>
*
* <p>The behaviour of this method is less deterministic
* than {@link #invokeExactMethod}.
* It loops through all methods with names that match
* and then executes the first it finds with compatable parameters.</p>
*
* <p>This method supports calls to methods taking primitive parameters
* via passing in wrapping classes. So, for example, a <code>Boolean</code> class
* would match a <code>boolean</code> primitive.</p>
*
* <p> This is a convenient wrapper for
* {@link #invokeMethod(Object object,String methodName,Object [] args)}.
* </p>
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param arg use this argument
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeMethod(
Object object,
String methodName,
Object arg)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
Object[] args = {arg};
return invokeMethod(object, methodName, args);
}
/**
* <p>Invoke a named method whose parameter type matches the object type.</p>
*
* <p>The behaviour of this method is less deterministic
* than {@link #invokeExactMethod(Object object,String methodName,Object [] args)}.
* It loops through all methods with names that match
* and then executes the first it finds with compatable parameters.</p>
*
* <p>This method supports calls to methods taking primitive parameters
* via passing in wrapping classes. So, for example, a <code>Boolean</code> class
* would match a <code>boolean</code> primitive.</p>
*
* <p> This is a convenient wrapper for
* {@link #invokeMethod(Object object,String methodName,Object [] args,Class[] parameterTypes)}.
* </p>
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param args use these arguments - treat null as empty array
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeMethod(
Object object,
String methodName,
Object[] args)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
if (args == null) {
args = emptyObjectArray;
}
int arguments = args.length;
Class parameterTypes [] = new Class[arguments];
for (int i = 0; i < arguments; i++) {
parameterTypes[i] = args[i].getClass();
}
return invokeMethod(object, methodName, args, parameterTypes);
}
/**
* <p>Invoke a named method whose parameter type matches the object type.</p>
*
* <p>The behaviour of this method is less deterministic
* than {@link
* #invokeExactMethod(Object object,String methodName,Object [] args,Class[] parameterTypes)}.
* It loops through all methods with names that match
* and then executes the first it finds with compatable parameters.</p>
*
* <p>This method supports calls to methods taking primitive parameters
* via passing in wrapping classes. So, for example, a <code>Boolean</code> class
* would match a <code>boolean</code> primitive.</p>
*
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param args use these arguments - treat null as empty array
* @param parameterTypes match these parameters - treat null as empty array
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeMethod(
Object object,
String methodName,
Object[] args,
Class[] parameterTypes)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
if (parameterTypes == null) {
parameterTypes = emptyClassArray;
}
if (args == null) {
args = emptyObjectArray;
}
Method method = getMatchingAccessibleMethod(
object.getClass(),
methodName,
parameterTypes);
if (method == null)
throw new NoSuchMethodException("No such accessible method: " +
methodName + "() on object: " + object.getClass().getName());
return method.invoke(object, args);
}
/**
* <p>Invoke a method whose parameter type matches exactly the object
* type.</p>
*
* <p> This is a convenient wrapper for
* {@link #invokeExactMethod(Object object,String methodName,Object [] args)}.
* </p>
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param arg use this argument
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeExactMethod(
Object object,
String methodName,
Object arg)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
Object[] args = {arg};
return invokeExactMethod(object, methodName, args);
}
/**
* <p>Invoke a method whose parameter types match exactly the object
* types.</p>
*
* <p> This uses reflection to invoke the method obtained from a call to
* {@link #getAccessibleMethod}.</p>
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param args use these arguments - treat null as empty array
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeExactMethod(
Object object,
String methodName,
Object[] args)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
if (args == null) {
args = emptyObjectArray;
}
int arguments = args.length;
Class parameterTypes [] = new Class[arguments];
for (int i = 0; i < arguments; i++) {
parameterTypes[i] = args[i].getClass();
}
return invokeExactMethod(object, methodName, args, parameterTypes);
}
/**
* <p>Invoke a method whose parameter types match exactly the parameter
* types given.</p>
*
* <p>This uses reflection to invoke the method obtained from a call to
* {@link #getAccessibleMethod}.</p>
*
* @param object invoke method on this object
* @param methodName get method with this name
* @param args use these arguments - treat null as empty array
* @param parameterTypes match these parameters - treat null as empty array
*
* @throws NoSuchMethodException if there is no such accessible method
* @throws InvocationTargetException wraps an exception thrown by the
* method invoked
* @throws IllegalAccessException if the requested method is not accessible
* via reflection
*/
public static Object invokeExactMethod(
Object object,
String methodName,
Object[] args,
Class[] parameterTypes)
throws
NoSuchMethodException,
IllegalAccessException,
InvocationTargetException {
if (args == null) {
args = emptyObjectArray;
}
if (parameterTypes == null) {
parameterTypes = emptyClassArray;
}
Method method = getAccessibleMethod(
object.getClass(),
methodName,
parameterTypes);
if (method == null)
throw new NoSuchMethodException("No such accessible method: " +
methodName + "() on object: " + object.getClass().getName());
return method.invoke(object, args);
}
/**
* <p>Return an accessible method (that is, one that can be invoked via
* reflection) with given name and a single parameter. If no such method
* can be found, return <code>null</code>.
* Basically, a convenience wrapper that constructs a <code>Class</code>
* array for you.</p>
*
* @param clazz get method from this class
* @param methodName get method with this name
* @param parameterType taking this type of parameter
*/
public static Method getAccessibleMethod(
Class clazz,
String methodName,
Class parameterType) {
Class[] parameterTypes = {parameterType};
return getAccessibleMethod(clazz, methodName, parameterTypes);
}
/**
* <p>Return an accessible method (that is, one that can be invoked via
* reflection) with given name and parameters. If no such method
* can be found, return <code>null</code>.
* This is just a convenient wrapper for
* {@link #getAccessibleMethod(Method method)}.</p>
*
* @param clazz get method from this class
* @param methodName get method with this name
* @param parameterTypes with these parameters types
*/
public static Method getAccessibleMethod(
Class clazz,
String methodName,
Class[] parameterTypes) {
try {
MethodDescriptor md = new MethodDescriptor(clazz, methodName, parameterTypes, true);
// Check the cache first
Method method = (Method)cache.get(md);
if (method != null) {
return method;
}
method = getAccessibleMethod
(clazz.getMethod(methodName, parameterTypes));
cache.put(md, method);
return method;
} catch (NoSuchMethodException e) {
return (null);
}
}
/**
* <p>Return an accessible method (that is, one that can be invoked via
* reflection) that implements the specified Method. If no such method
* can be found, return <code>null</code>.</p>
*
* @param method The method that we wish to call
*/
public static Method getAccessibleMethod(Method method) {
// Make sure we have a method to check
if (method == null) {
return (null);
}
// If the requested method is not public we cannot call it
if (!Modifier.isPublic(method.getModifiers())) {
return (null);
}
// If the declaring class is public, we are done
Class clazz = method.getDeclaringClass();
if (Modifier.isPublic(clazz.getModifiers())) {
return (method);
}
// Check the implemented interfaces and subinterfaces
method =
getAccessibleMethodFromInterfaceNest(clazz,
method.getName(),
method.getParameterTypes());
return (method);
}
// -------------------------------------------------------- Private Methods
/**
* <p>Return an accessible method (that is, one that can be invoked via
* reflection) that implements the specified method, by scanning through
* all implemented interfaces and subinterfaces. If no such method
* can be found, return <code>null</code>.</p>
*
* <p> There isn't any good reason why this method must be private.
* It is because there doesn't seem any reason why other classes should
* call this rather than the higher level methods.</p>
*
* @param clazz Parent class for the interfaces to be checked
* @param methodName Method name of the method we wish to call
* @param parameterTypes The parameter type signatures
*/
private static Method getAccessibleMethodFromInterfaceNest
(Class clazz, String methodName, Class parameterTypes[]) {
Method method = null;
// Search up the superclass chain
for (; clazz != null; clazz = clazz.getSuperclass()) {
// Check the implemented interfaces of the parent class
Class interfaces[] = clazz.getInterfaces();
for (int i = 0; i < interfaces.length; i++) {
// Is this interface public?
if (!Modifier.isPublic(interfaces[i].getModifiers()))
continue;
// Does the method exist on this interface?
try {
method = interfaces[i].getDeclaredMethod(methodName,
parameterTypes);
} catch (NoSuchMethodException e) {
;
}
if (method != null)
break;
// Recursively check our parent interfaces
method =
getAccessibleMethodFromInterfaceNest(interfaces[i],
methodName,
parameterTypes);
if (method != null)
break;
}
}
// If we found a method return it
if (method != null)
return (method);
// We did not find anything
return (null);
}
/**
* <p>Find an accessible method that matches the given name and has compatible parameters.
* Compatible parameters mean that every method parameter is assignable from
* the given parameters.
* In other words, it finds a method with the given name
* that will take the parameters given.<p>
*
* <p>This method is slightly undeterminstic since it loops
* through methods names and return the first matching method.</p>
*
* <p>This method is used by
* {@link
* #invokeMethod(Object object,String methodName,Object [] args,Class[] parameterTypes)}.
*
* <p>This method can match primitive parameter by passing in wrapper classes.
* For example, a <code>Boolean</code> will match a primitive <code>boolean</code>
* parameter.
*
* @param clazz find method in this class
* @param methodName find method with this name
* @param parameterTypes find method with compatible parameters
*/
public static Method getMatchingAccessibleMethod(
Class clazz,
String methodName,
Class[] parameterTypes) {
MethodDescriptor md = new MethodDescriptor(clazz, methodName, parameterTypes, false);
// see if we can find the method directly
// most of the time this works and it's much faster
try {
// Check the cache first
Method method = (Method)cache.get(md);
if (method != null) {
return method;
}
method = clazz.getMethod(methodName, parameterTypes);
cache.put(md, method);
return method;
} catch (NoSuchMethodException e) { /* SWALLOW */ }
// search through all methods
int paramSize = parameterTypes.length;
Method[] methods = clazz.getMethods();
for (int i = 0, size = methods.length; i < size ; i++) {
if (methods[i].getName().equals(methodName)) {
// compare parameters
Class[] methodsParams = methods[i].getParameterTypes();
int methodParamSize = methodsParams.length;
if (methodParamSize == paramSize) {
boolean match = true;
for (int n = 0 ; n < methodParamSize; n++) {
if (!isAssignmentCompatible(methodsParams[n], parameterTypes[n])) {
match = false;
break;
}
}
if (match) {
// get accessible version of method
Method method = getAccessibleMethod(methods[i]);
if (method != null) {
try {
//
// XXX Default access superclass workaround
// (See above for more details.)
//
method.setAccessible(true);
} catch (SecurityException se) {
}
cache.put(md, method);
return method;
}
}
}
}
}
// didn't find a match
return null;
}
/**
* <p>Determine whether a type can be used as a parameter in a method invocation.
* This method handles primitive conversions correctly.</p>
*
* <p>In order words, it will match a <code>Boolean</code> to a <code>boolean</code>,
* a <code>Long</code> to a <code>long</code>,
* a <code>Float</code> to a <code>float</code>,
* a <code>Integer</code> to a <code>int</code>,
* and a <code>Double</code> to a <code>double</code>.
* Now logic widening matches are allowed.
* For example, a <code>Long</code> will not match a <code>int</code>.
*
* @param parameterType the type of parameter accepted by the method
* @param parameterization the type of parameter being tested
*
* @return true if the assignement is compatible.
*/
public static final boolean isAssignmentCompatible(Class parameterType, Class parameterization) {
// try plain assignment
if (parameterType.isAssignableFrom(parameterization)) {
return true;
}
if (parameterType.isPrimitive()) {
// this method does *not* do widening - you must specify exactly
// is this the right behaviour?
Class parameterWrapperClazz = getPrimitiveWrapper(parameterType);
if (parameterWrapperClazz != null) {
return parameterWrapperClazz.equals(parameterization);
}
}
return false;
}
/**
* Gets the wrapper object class for the given primitive type class.
* For example, passing <code>boolean.class</code> returns <code>Boolean.class</code>
* @param primitiveType the primitive type class for which a match is to be found
* @return the wrapper type associated with the given primitive
* or null if no match is found
*/
public static Class getPrimitiveWrapper(Class primitiveType) {
// does anyone know a better strategy than comparing names?
if (boolean.class.equals(primitiveType)) {
return Boolean.class;
} else if (float.class.equals(primitiveType)) {
return Float.class;
} else if (long.class.equals(primitiveType)) {
return Long.class;
} else if (int.class.equals(primitiveType)) {
return Integer.class;
} else if (short.class.equals(primitiveType)) {
return Short.class;
} else if (byte.class.equals(primitiveType)) {
return Byte.class;
} else if (double.class.equals(primitiveType)) {
return Double.class;
} else if (char.class.equals(primitiveType)) {
return Character.class;
} else {
return null;
}
}
/**
* Gets the class for the primitive type corresponding to the primitive wrapper class given.
* For example, an instance of <code>Boolean.class</code> returns a <code>boolean.class</code>.
* @param wrapperType the
* @return the primitive type class corresponding to the given wrapper class,
* null if no match is found
*/
public static Class getPrimitiveType(Class wrapperType) {
// does anyone know a better strategy than comparing names?
if (Boolean.class.equals(wrapperType)) {
return boolean.class;
} else if (Float.class.equals(wrapperType)) {
return float.class;
} else if (Long.class.equals(wrapperType)) {
return long.class;
} else if (Integer.class.equals(wrapperType)) {
return int.class;
} else if (Short.class.equals(wrapperType)) {
return short.class;
} else if (Byte.class.equals(wrapperType)) {
return byte.class;
} else if (Double.class.equals(wrapperType)) {
return double.class;
} else if (Character.class.equals(wrapperType)) {
return char.class;
} else {
return null;
}
}
/**
* Find a non primitive representation for given primitive class.
*
* @param Class the class to find a representation for, not null
* @return the original class if it not a primitive. Otherwise the wrapper class. Not null
*/
public static Class toNonPrimitiveClass(Class clazz) {
if (clazz.isPrimitive()) {
Class primitiveClazz = MethodUtils.getPrimitiveWrapper(clazz);
// the above method returns
if (primitiveClazz != null) {
return primitiveClazz;
} else {
return clazz;
}
} else {
return clazz;
}
}
/**
* Represents the key to looking up a Method by reflection.
*/
private static class MethodDescriptor {
private Class cls;
private String methodName;
private Class[] paramTypes;
private boolean exact;
private int hashCode;
/**
* The sole constructor.
*
* @param cls the class to reflect, must not be null
* @param methodName the method name to obtain
* @param paramTypes the array of classes representing the paramater types
* @param exact whether the match has to be exact.
*/
public MethodDescriptor(Class cls, String methodName, Class[] paramTypes, boolean exact) {
if (cls == null) {
throw new IllegalArgumentException("Class cannot be null");
}
if (methodName == null) {
throw new IllegalArgumentException("Method Name cannot be null");
}
if (paramTypes == null) {
paramTypes = emptyClassArray;
}
this.cls = cls;
this.methodName = methodName;
this.paramTypes = paramTypes;
this.exact= exact;
this.hashCode = methodName.length();
}
/**
* Checks for equality.
* @param obj object to be tested for equality
* @return true, if the object describes the same Method.
*/
public boolean equals(Object obj) {
if (!(obj instanceof MethodDescriptor)) {
return false;
}
MethodDescriptor md = (MethodDescriptor)obj;
return (
exact == md.exact &&
methodName.equals(md.methodName) &&
cls.equals(md.cls) &&
java.util.Arrays.equals(paramTypes, md.paramTypes)
);
}
/**
* Returns the string length of method name. I.e. if the
* hashcodes are different, the objects are different. If the
* hashcodes are the same, need to use the equals method to
* determine equality.
* @return the string length of method name.
*/
public int hashCode() {
return hashCode;
}
}
}
The table below shows all metrics for MethodUtils.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 77.00 | Number of blocks | |
| BLOCK_COMMENT | 15.00 | Number of block comment lines | |
| COMMENTS | 330.00 | Comment lines | |
| COMMENT_DENSITY | 1.19 | Comment density | |
| COMPARISONS | 57.00 | Number of comparison operators | |
| CYCLOMATIC | 78.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 27.00 | Comments in declarations | |
| DOC_COMMENT | 283.00 | Number of javadoc comment lines | |
| ELOC | 278.00 | Effective lines of code | |
| EXEC_COMMENTS | 24.00 | Comments in executable code | |
| EXITS | 34.00 | Procedure exits | |
| FUNCTIONS | 18.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 85.09 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 117.00 | 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 | 0.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | 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 | 6.00 | 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 | 2.00 | 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 | 3.00 | 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 | 1.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 1.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 11.00 | 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 | 0.00 | 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 | 1.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 1.00 | 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 | 0.00 | 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 | 1.00 | 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 | 1.00 | 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 | 1.00 | 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 | 1.00 | 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 | 749.00 | Number of lines in the source file | |
| LINE_COMMENT | 32.00 | Number of line comments | |
| LOC | 334.00 | Lines of code | |
| LOGICAL_LINES | 130.00 | Number of statements | |
| LOOPS | 6.00 | Number of loops | |
| NEST_DEPTH | 7.00 | Maximum nesting depth | |
| OPERANDS | 585.00 | Number of operands | |
| OPERATORS | 1313.00 | Number of operators | |
| PARAMS | 43.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1898.00 | Halstead program length | |
| PROGRAM_VOCAB | 213.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 74.00 | Number of return points from functions | |
| SIZE | 27728.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 165.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 48.00 | Number of unique operators | |
| WHITESPACE | 85.00 | Number of whitespace lines | |