ClassParser.java
| Index Score | ||
|---|---|---|
 |
 |
edu.umd.cs.findbugs.classfile.engine |
 |
 |
FindBugs |
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 | |
|---|---|---|
| RETURNS | Number of return points from functions |  |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0144 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0171 | JAVA0171 Unused local variable | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| DECL_COMMENTS | Comments in declarations | |
| SIZE | Size of the file in bytes | |
| JAVA0029 | JAVA0029 Private method not used | |
| PARAMS | Number of formal parameter declarations | |
| OPERANDS | Number of operands | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| UNIQUE_OPERATORS | Number of unique operators | |
| UNIQUE_OPERANDS | Number of unique operands | |
| COMMENTS | Comment lines | |
| PROGRAM_LENGTH | Halstead program length | |
| JAVA0119 | JAVA0119 Control variable changed within body of for loop | |
| DOC_COMMENT | Number of javadoc comment lines | |
| PROGRAM_VOLUME | Halstead program volume | |
| EXITS | Procedure exits | |
| LOGICAL_LINES | Number of statements | |
| OPERATORS | Number of operators | |
| CYCLOMATIC | Cyclomatic complexity | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0109 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| LOOPS | Number of loops | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| ELOC | Effective lines of code | |
| LINES | Number of lines in the source file | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0068 | JAVA0068 Modifiers not declared in recommended order | |
| WHITESPACE | Number of whitespace lines | |
/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2006, University of Maryland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.umd.cs.findbugs.classfile.engine;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import edu.umd.cs.findbugs.annotations.CheckForNull;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
import edu.umd.cs.findbugs.classfile.DescriptorFactory;
import edu.umd.cs.findbugs.classfile.FieldDescriptor;
import edu.umd.cs.findbugs.classfile.IClassConstants;
import edu.umd.cs.findbugs.classfile.ICodeBaseEntry;
import edu.umd.cs.findbugs.classfile.InvalidClassFileFormatException;
import edu.umd.cs.findbugs.classfile.MethodDescriptor;
import edu.umd.cs.findbugs.classfile.analysis.ClassInfo;
import edu.umd.cs.findbugs.classfile.analysis.ClassNameAndSuperclassInfo;
import edu.umd.cs.findbugs.internalAnnotations.SlashedClassName;
import edu.umd.cs.findbugs.io.IO;
import edu.umd.cs.findbugs.util.ClassName;
/**
* Parse a class to extract symbolic information.
* see <a href=http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html">
http://java.sun.com/docs/books/vmspec/2nd-edition/html/ClassFile.doc.html </a>
*
* @author David Hovemeyer
*/
public class ClassParser implements ClassParserInterface {
static class Constant {
int tag;
Object[] data;
Constant(int tag, Object[] data) {
this.tag = tag;
this.data = data;
}
}
private DataInputStream in;
private ClassDescriptor expectedClassDescriptor;
private ICodeBaseEntry codeBaseEntry;
private Constant[] constantPool;
private ClassDescriptor immediateEnclosingClass;
/**
* Constructor.
*
* @param in the DataInputStream to read class data from
* @param expectedClassDescriptor ClassDescriptor expected: null if unknown
* @param codeBaseEntry codebase entry class is loaded from
*/
public ClassParser(
DataInputStream in,
@CheckForNull ClassDescriptor expectedClassDescriptor,
ICodeBaseEntry codeBaseEntry) {
this.in = in;
this.expectedClassDescriptor = expectedClassDescriptor;
this.codeBaseEntry = codeBaseEntry;
}
/* (non-Javadoc)
* @see edu.umd.cs.findbugs.classfile.engine.ClassParserInterface#parse(edu.umd.cs.findbugs.classfile.analysis.ClassNameAndSuperclassInfo.Builder)
*/
public void parse(ClassNameAndSuperclassInfo.Builder builder) throws InvalidClassFileFormatException {
try {
int magic = in.readInt();
if (magic != 0xcafebabe) throw new InvalidClassFileFormatException("Classfile header isn't 0xCAFEBABE", expectedClassDescriptor, codeBaseEntry);
int major_version = in.readUnsignedShort();
int minor_version = in.readUnsignedShort();
int constant_pool_count = in.readUnsignedShort();
constantPool = new Constant[constant_pool_count];
for (int i = 1; i < constantPool.length; i++) {
constantPool[i] = readConstant();
if (constantPool[i].tag == IClassConstants.CONSTANT_Double ||
constantPool[i].tag == IClassConstants.CONSTANT_Long) {
// Double and Long constants take up two constant pool entries
++i;
}
}
int access_flags = in.readUnsignedShort();
int this_class = in.readUnsignedShort();
ClassDescriptor thisClassDescriptor =
getClassDescriptor(this_class);
int super_class = in.readUnsignedShort();
ClassDescriptor superClassDescriptor =
getClassDescriptor(super_class);
int interfaces_count = in.readUnsignedShort();
if (interfaces_count < 0) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
ClassDescriptor[] interfaceDescriptorList = new ClassDescriptor[interfaces_count];
for (int i = 0; i < interfaceDescriptorList.length; i++) {
interfaceDescriptorList[i] = getClassDescriptor(in.readUnsignedShort());
}
// Extract all references to other classes,
// both CONSTANT_Class entries and also referenced method
// signatures.
Collection<ClassDescriptor> referencedClassDescriptorList = extractReferencedClasses();
builder.setClassDescriptor(thisClassDescriptor);
builder.setSuperclassDescriptor(superClassDescriptor);
builder.setInterfaceDescriptorList(interfaceDescriptorList);
builder.setCodeBaseEntry(codeBaseEntry);
builder.setAccessFlags(access_flags);
builder.setReferencedClassDescriptors(referencedClassDescriptorList);
builder.setClassfileVersion(major_version, minor_version);
} catch (IOException e) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry, e);
}
}
/* (non-Javadoc)
* @see edu.umd.cs.findbugs.classfile.engine.ClassParserInterface#parse(edu.umd.cs.findbugs.classfile.analysis.ClassInfo.Builder)
*/
public void parse(ClassInfo.Builder builder) throws InvalidClassFileFormatException {
throw new UnsupportedOperationException("Need to use a ClassParserUsingASM to build ClassInfo");
}
/**
* Extract references to other classes.
*
* @return array of ClassDescriptors of referenced classes
* @throws InvalidClassFileFormatException
*/
private Collection<ClassDescriptor> extractReferencedClasses() throws InvalidClassFileFormatException {
Set<ClassDescriptor> referencedClassSet = new HashSet<ClassDescriptor>();
for (Constant constant : constantPool) {
if (constant == null) {
continue;
}
if (constant.tag == IClassConstants.CONSTANT_Class) {
@SlashedClassName String className = getUtf8String((Integer)constant.data[0]);
if (className.indexOf('[') >= 0) {
extractReferencedClassesFromSignature(referencedClassSet, className);
} else if (ClassName.isValidClassName(className)) {
referencedClassSet.add(DescriptorFactory.instance().getClassDescriptor(className));
}
} else if (constant.tag == IClassConstants.CONSTANT_Methodref
|| constant.tag == IClassConstants.CONSTANT_Fieldref
|| constant.tag == IClassConstants.CONSTANT_InterfaceMethodref) {
// Get the target class name
String className = getClassName((Integer) constant.data[0]);
extractReferencedClassesFromSignature(referencedClassSet, className);
// Parse signature to extract class names
String signature = getSignatureFromNameAndType((Integer)constant.data[1]);
extractReferencedClassesFromSignature(referencedClassSet, signature);
}
}
return referencedClassSet;
}
/**
* @param referencedClassSet
* @param signature
*/
public static void extractReferencedClassesFromSignature(Set<ClassDescriptor> referencedClassSet, String signature) {
while (signature.length() > 0) {
int start = signature.indexOf('L');
if (start < 0) {
break;
}
int end = signature.indexOf(';', start);
if (end < 0) {
break;
}
@SlashedClassName String className = signature.substring(start+1, end);
if (ClassName.isValidClassName(className)) {
referencedClassSet.add(DescriptorFactory.instance().getClassDescriptor(className));
}
signature = signature.substring(end + 1);
}
}
// 8: UTF-8 string
// I: int
// F: float
// L: long
// D: double
// i: 2-byte constant pool index
private static final String[] CONSTANT_FORMAT_MAP = {
null,
"8", // 1: CONSTANT_Utf8
null,
"I", // 3: CONSTANT_Integer
"F", // 4: CONSTANT_Float
"L", // 5: CONSTANT_Long
"D", // 6: CONSTANT_Double
"i", // 7: CONSTANT_Class
"i", // 8: CONSTANT_String
"ii", // 9: CONSTANT_Fieldref
"ii", // 10: CONSTANT_Methodref
"ii", // 11: CONSTANT_InterfaceMethodref
"ii", // 12: CONSTANT_NameAndType
};
/**
* Read a constant from the constant pool.
*
* @return a Constant
* @throws InvalidClassFileFormatException
* @throws IOException
*/
private Constant readConstant()
throws InvalidClassFileFormatException, IOException {
int tag = in.readUnsignedByte();
if (tag < 0 || tag >= CONSTANT_FORMAT_MAP.length || CONSTANT_FORMAT_MAP[tag] == null) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
String format = CONSTANT_FORMAT_MAP[tag];
Object[] data = new Object[format.length()];
for (int i = 0; i < format.length(); i++) {
char spec = format.charAt(i);
switch (spec) {
case '8':
data[i] = in.readUTF();
break;
case 'I':
data[i] = in.readInt();
break;
case 'F':
data[i] = new Float(in.readFloat());
break;
case 'L':
data[i] = in.readLong();
break;
case 'D':
data[i] = new Double(in.readDouble());
break;
case 'i':
data[i] = in.readUnsignedShort();
break;
default: throw new IllegalStateException();
}
}
return new Constant(tag, data);
}
/**
* Get a class name from a CONSTANT_Class.
* Note that this may be an array (e.g., "[Ljava/lang/String;").
*
* @param index index of the constant
* @return the class name
* @throws InvalidClassFileFormatException
*/
private @SlashedClassName String getClassName(int index) throws InvalidClassFileFormatException {
if (index == 0) {
return null;
}
checkConstantPoolIndex(index);
Constant constant = constantPool[index];
checkConstantTag(constant, IClassConstants.CONSTANT_Class);
int refIndex = ((Integer)constant.data[0]).intValue();
String stringValue = getUtf8String(refIndex);
return stringValue;
}
/**
* Get the ClassDescriptor of a class referenced in the constant pool.
*
* @param index index of the referenced class in the constant pool
* @return the ClassDescriptor of the referenced class
* @throws InvalidClassFileFormatException
*/
private ClassDescriptor getClassDescriptor(int index) throws InvalidClassFileFormatException {
@SlashedClassName String className = getClassName(index);
return className != null ? DescriptorFactory.instance().getClassDescriptor(className) : null;
}
/**
* Get the UTF-8 string constant at given constant pool index.
*
* @param refIndex the constant pool index
* @return the String at that index
* @throws InvalidClassFileFormatException
*/
private String getUtf8String(int refIndex) throws InvalidClassFileFormatException {
checkConstantPoolIndex(refIndex);
Constant refConstant = constantPool[refIndex];
checkConstantTag(refConstant, IClassConstants.CONSTANT_Utf8);
return (String) refConstant.data[0];
}
/**
* Check that a constant pool index is valid.
*
* @param expectedClassDescriptor class descriptor
* @param constantPool the constant pool
* @param index the index to check
* @throws InvalidClassFileFormatException if the index is not valid
*/
private void checkConstantPoolIndex(int index) throws InvalidClassFileFormatException {
if (index < 0 || index >= constantPool.length || constantPool[index] == null) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
}
/**
* Check that a constant has the expected tag.
*
* @param constant the constant to check
* @param expectedTag the expected constant tag
* @throws InvalidClassFileFormatException if the constant's tag does not match the expected tag
*/
private void checkConstantTag(Constant constant, int expectedTag)
throws InvalidClassFileFormatException {
if (constant.tag != expectedTag) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
}
interface FieldOrMethodDescriptorCreator<E> {
public E create(String className, String name, String signature, int accessFlags);
}
/**
* Read field_info, return FieldDescriptor.
*
* @param thisClassDescriptor the ClassDescriptor of this class (being parsed)
* @return the FieldDescriptor
* @throws IOException
* @throws InvalidClassFileFormatException
*/
private FieldDescriptor readField(ClassDescriptor thisClassDescriptor)
throws IOException, InvalidClassFileFormatException {
return readFieldOrMethod(thisClassDescriptor, new FieldOrMethodDescriptorCreator<FieldDescriptor>() {
/* (non-Javadoc)
* @see edu.umd.cs.findbugs.classfile.engine.ClassParser.FieldOrMethodDescriptorCreator#create(java.lang.String, java.lang.String, java.lang.String, int)
*/
public FieldDescriptor create(String className, String name, String signature, int accessFlags) {
return DescriptorFactory.instance().getFieldDescriptor(className, name, signature, (accessFlags & IClassConstants.ACC_STATIC) != 0);
}
});
}
/**
* Read method_info, read method descriptor.
*
* @param thisClassDescriptor
* @return
* @throws IOException
* @throws InvalidClassFileFormatException
*/
private MethodDescriptor readMethod(ClassDescriptor thisClassDescriptor)
throws InvalidClassFileFormatException, IOException {
return readFieldOrMethod(thisClassDescriptor, new FieldOrMethodDescriptorCreator<MethodDescriptor>(){
/* (non-Javadoc)
* @see edu.umd.cs.findbugs.classfile.engine.ClassParser.FieldOrMethodDescriptorCreator#create(java.lang.String, java.lang.String, java.lang.String, int)
*/
public MethodDescriptor create(String className, String name, String signature, int accessFlags) {
return DescriptorFactory.instance().getMethodDescriptor(className, name, signature, (accessFlags & IClassConstants.ACC_STATIC) != 0);
}
});
}
/**
* Read field_info or method_info.
* They have the same format.
*
* @param <E> descriptor type to return
* @param thisClassDescriptor class descriptor of class being parsed
* @param creator callback to create the FieldDescriptor or MethodDescriptor
* @return the parsed descriptor
* @throws IOException
* @throws InvalidClassFileFormatException
*/
private<E> E readFieldOrMethod(
ClassDescriptor thisClassDescriptor, FieldOrMethodDescriptorCreator<E> creator)
throws IOException, InvalidClassFileFormatException {
int access_flags = in.readUnsignedShort();
int name_index = in.readUnsignedShort();
int descriptor_index = in.readUnsignedShort();
int attributes_count = in.readUnsignedShort();
String name = getUtf8String(name_index);
String signature = getUtf8String(descriptor_index);
if (attributes_count < 0) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
for (int i = 0; i < attributes_count; i++) {
readAttribute();
}
return creator.create(
thisClassDescriptor.getClassName(), name, signature, access_flags);
}
/**
* Read an attribute.
*
* @throws IOException
* @throws InvalidClassFileFormatException
*/
private void readAttribute() throws IOException, InvalidClassFileFormatException {
int attribute_name_index = in.readUnsignedShort();
String attrName = getUtf8String(attribute_name_index);
int attribute_length = in.readInt();
if (attribute_length < 0) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
if (attrName.equals("InnerClasses")) {
readInnerClassesAttribute(attribute_length);
} else {
IO.skipFully(in, attribute_length);
}
}
/**
* Read an InnerClasses attribute.
*
* @param attribute_length length of attribute (excluding first 6 bytes)
* @throws InvalidClassFileFormatException
* @throws IOException
*/
private void readInnerClassesAttribute(int attribute_length) throws InvalidClassFileFormatException, IOException {
int number_of_classes = in.readUnsignedShort();
if (attribute_length != number_of_classes * 8) {
throw new InvalidClassFileFormatException(expectedClassDescriptor, codeBaseEntry);
}
for (int i = 0; i < number_of_classes; i++) {
int inner_class_info_index = in.readUnsignedShort();
int outer_class_info_index = in.readUnsignedShort();
int inner_name_index = in.readUnsignedShort();
int inner_class_access_flags = in.readUnsignedShort();
if (outer_class_info_index != 0) {
// Record which class this class is a member of.
this.immediateEnclosingClass = getClassDescriptor(outer_class_info_index);
}
}
}
/**
* Get the signature from a CONSTANT_NameAndType.
*
* @param index the index of the CONSTANT_NameAndType
* @return the signature
* @throws InvalidClassFileFormatException
*/
private String getSignatureFromNameAndType(int index) throws InvalidClassFileFormatException {
checkConstantPoolIndex(index);
Constant constant = constantPool[index];
checkConstantTag(constant, IClassConstants.CONSTANT_NameAndType);
return getUtf8String((Integer) constant.data[1]);
}
}
The table below shows all metrics for ClassParser.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 49.00 | Number of blocks | |
| BLOCK_COMMENT | 30.00 | Number of block comment lines | |
| COMMENTS | 158.00 | Comment lines | |
| COMMENT_DENSITY | 0.68 | Comment density | |
| COMPARISONS | 37.00 | Number of comparison operators | |
| CYCLOMATIC | 63.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 22.00 | Comments in declarations | |
| DOC_COMMENT | 115.00 | Number of javadoc comment lines | |
| ELOC | 231.00 | Effective lines of code | |
| EXEC_COMMENTS | 5.00 | Comments in executable code | |
| EXITS | 44.00 | Procedure exits | |
| FUNCTIONS | 21.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 88.24 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 112.00 | 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 | 0.00 | 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 | 2.00 | 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 | 1.00 | 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 | 1.00 | 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 | 1.00 | 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 | 2.00 | 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 | 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 | 1.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 1.00 | 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 | 0.00 | 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 | 1.00 | 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 | 1.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 7.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 804.00 | 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 | 3.00 | 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 | 0.00 | 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 | 481.00 | Number of lines in the source file | |
| LINE_COMMENT | 13.00 | Number of line comments | |
| LOC | 280.00 | Lines of code | |
| LOGICAL_LINES | 151.00 | Number of statements | |
| LOOPS | 6.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 750.00 | Number of operands | |
| OPERATORS | 1278.00 | Number of operators | |
| PARAMS | 33.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2028.00 | Halstead program length | |
| PROGRAM_VOCAB | 273.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 79.00 | Number of return points from functions | |
| SIZE | 17155.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 221.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 52.00 | Number of unique operators | |
| WHITESPACE | 43.00 | Number of whitespace lines | |