Frame.java
| Index Score | ||
|---|---|---|
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edu.umd.cs.findbugs.ba |
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|
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 | |
|---|---|---|
| JAVA0034 | JAVA0034 Missing braces in if statement |  |
| DECL_COMMENTS | Comments in declarations | |
| DOC_COMMENT | Number of javadoc comment lines | |
| COMMENTS | Comment lines | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| RETURNS | Number of return points from functions | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| CYCLOMATIC | Cyclomatic complexity | |
| SIZE | Size of the file in bytes | |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| COMPARISONS | Number of comparison operators | |
| LINES | Number of lines in the source file | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| FUNCTIONS | Number of function declarations | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0035 | JAVA0035 Missing braces in for statement | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| EXITS | Procedure exits | |
| JAVA0160 | JAVA0160 Method does not throw specified exception | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| EXEC_COMMENTS | Comments in executable code | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| OPERATORS | Number of operators | |
| ELOC | Effective lines of code | |
| PROGRAM_LENGTH | Halstead program length | |
/*
* Bytecode Analysis Framework
* Copyright (C) 2003,2004 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.ba;
import static edu.umd.cs.findbugs.ba.Debug.VERIFY_INTEGRITY;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.Collection;
import java.util.Collections;
import org.apache.bcel.Constants;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.InvokeInstruction;
import org.apache.bcel.generic.StackConsumer;
import edu.umd.cs.findbugs.SystemProperties;
/**
* Generic class for representing a Java stack frame as a dataflow value. A
* frame consists of "slots", which represent the local variables and values on
* the Java operand stack. Slots 0 .. <code>getNumLocals() - 1</code>
* represent the local variables. Slots <code>getNumLocals()</code> ..
* <code>getNumSlots() - 1</code> represent the Java operand stack. <p/>
* <p>
* Frame is parametized by "ValueType", which is the type of value to be stored
* in the Frame's slots. This type must form a lattice, according to the
* abstract mergeValues() operation in the corresponding analysis class (which
* should be derived from FrameDataflowAnalysis). When a Frame is constructed,
* all of its slots will contain null. The analysis is responsible for
* initializing created Frames with default values at the appropriate time.
* Typically, only initEntryFact() will need to do this. <p/>
* <p>
* A Frame may have the special "TOP" value. Such frames serve as the identity
* element for the meet operation operation. <p/>
* <p>
* A Frame may have the special "BOTTOM" value. The result of merging any frame
* with BOTTOM is BOTTOM.
*
* @author David Hovemeyer
* @see FrameDataflowAnalysis
*/
public abstract class Frame<ValueType> {
// //////////////////////////////////////////////////////////////////////////////////
// Instance variables
// //////////////////////////////////////////////////////////////////////////////////
private int lastUpdateTimestamp;
/**
* Number of local variables in the method.
*/
private int numLocals;
/**
* Array storing the values of local variables and operand stack slots.
*/
private ArrayList<ValueType> slotList;
/**
* Flag marking this frame as a special "TOP" value. Such Frames serve as
* the identity element when merging.
*/
private boolean isTop;
/**
* Flag marking this frame as a special "BOTTOM" value. Such Frames arise
* when merging two frames of different size.
*/
private boolean isBottom;
/**
* Default number of stack slots to preallocate space for.
*/
private static final int DEFAULT_STACK_CAPACITY = 10;
// //////////////////////////////////////////////////////////////////////////////////
// Methods
// //////////////////////////////////////////////////////////////////////////////////
/**
* Constructor. This version of the constructor is for subclasses for which
* it is always safe to call getDefaultValue(), even when the object is not
* fully initialized.
*
* @param numLocals
* number of local variable slots in the method
*/
public Frame(int numLocals) {
this.numLocals = numLocals;
this.slotList = new ArrayList<ValueType>(numLocals
+ DEFAULT_STACK_CAPACITY);
for (int i = 0; i < numLocals; ++i)
slotList.add(null);
}
/**
* Return whether or not this object the special "TOP" value for Frames.
* Such Frames are the identity element of the meet operation.
*/
public boolean isTop() {
return isTop;
}
/**
* Make this frame the special "TOP" value. Such Frames are the identity
* element of the meet operation.
*/
public void setTop() {
isTop = true;
isBottom = false;
lastUpdateTimestamp = 0;
}
/**
* Return whether or not this object is the special "BOTTOM" value for
* Frames. Such Frames arise when merging two frames of different size.
*/
public boolean isBottom() {
return isBottom;
}
/**
* Make this Frame the special "BOTTOM" value. Such Frames arise when
* merging two frames of different size.
*/
public void setBottom() {
isBottom = true;
isTop = false;
}
/**
* Set the Frame to be valid (neither TOP nor BOTTOM).
*/
public void setValid() {
isTop = isBottom = false;
}
/**
* Is the frame valid (meaning it is not TOP or BOTTOM)?
*/
public boolean isValid() {
return !isTop() && !isBottom();
}
/**
* Push a value onto the Java operand stack.
*
* @param value
* the ValueType to push
*/
public void pushValue(ValueType value) {
if (VERIFY_INTEGRITY && value == null)
throw new IllegalArgumentException();
if (!isValid())
throw new IllegalStateException("accessing top or bottom frame");
slotList.add(value);
}
/**
* Pop a value off of the Java operand stack.
*
* @return the value that was popped
* @throws DataflowAnalysisException
* if the Java operand stack is empty
*/
public ValueType popValue() throws DataflowAnalysisException {
if (!isValid())
throw new DataflowAnalysisException("accessing top or bottom frame");
if (slotList.size() == numLocals)
throw new DataflowAnalysisException("operand stack empty");
return slotList.remove(slotList.size() - 1);
}
/**
* Get the value on the top of the Java operand stack.
*
* @throws DataflowAnalysisException
* if the Java operand stack is empty
*/
public ValueType getTopValue() throws DataflowAnalysisException {
if (!isValid())
throw new DataflowAnalysisException("accessing top or bottom frame");
assert slotList.size() >= numLocals;
if (slotList.size() == numLocals)
throw new DataflowAnalysisException("operand stack is empty");
return slotList.get(slotList.size() - 1);
}
/**
* Get the values on the top of the Java operand stack. The top stack item
* is placed at the end of the array, so that to restore the values to the
* stack, you would push them in the order they appear in the array.
*/
public void getTopStackWords(ValueType[] valueList)
throws DataflowAnalysisException {
int stackDepth = getStackDepth();
if (valueList.length > stackDepth)
throw new DataflowAnalysisException("not enough values on stack");
int numSlots = slotList.size();
for (int i = numSlots - valueList.length, j = 0; i < numSlots; ++i, ++j) {
valueList[j] = slotList.get(i);
}
}
/**
* Get a value on the operand stack.
*
* @param loc
* the stack location, counting downwards from the top (location
* 0)
*/
public ValueType getStackValue(int loc) throws DataflowAnalysisException {
if (!isValid())
throw new DataflowAnalysisException(
"Accessing TOP or BOTTOM frame!");
int stackDepth = getStackDepth();
if (loc >= stackDepth)
throw new DataflowAnalysisException(
"not enough values on stack: access=" + loc + ", avail="
+ stackDepth);
return slotList.get(slotList.size() - (loc + 1));
}
/**
* Get a the location in the frame of a value on the operand stack.
*
* @param loc
* the stack location, counting downwards from the top (location
* 0)
*/
public int getStackLocation(int loc) throws DataflowAnalysisException {
int stackDepth = getStackDepth();
if (loc >= stackDepth)
throw new DataflowAnalysisException(
"not enough values on stack: access=" + loc + ", avail="
+ stackDepth);
return slotList.size() - (loc + 1);
}
/**
* Get the value corresponding to the object instance used in the given
* instruction. This relies on the observation that in instructions which
* use an object instance (such as getfield, invokevirtual, etc.), the
* object instance is the first operand used by the instruction.
*
* @param ins
* the instruction
* @param cpg
* the ConstantPoolGen for the method
*/
public ValueType getInstance(Instruction ins, ConstantPoolGen cpg)
throws DataflowAnalysisException {
return getStackValue(getInstanceStackLocation(ins, cpg));
}
/**
* Get the stack location (counting down from top of stack, starting at 0)
* containing the object instance referred to by given instruction. This
* relies on the observation that in instructions which use an object
* instance (such as getfield, invokevirtual, etc.), the object instance is
* the first operand used by the instruction.
*
* <p>
* The value returned may be passed to getStackValue(int).
* </p>
*
* @param ins
* the Instruction
* @param cpg
* the ConstantPoolGen for the method
* @return stack location (counting down from top of stack, starting at 0)
* containing the object instance
* @throws DataflowAnalysisException
*/
public int getInstanceStackLocation(Instruction ins, ConstantPoolGen cpg)
throws DataflowAnalysisException {
int numConsumed = ins.consumeStack(cpg);
if (numConsumed == Constants.UNPREDICTABLE)
throw new DataflowAnalysisException(
"Unpredictable stack consumption in " + ins);
return numConsumed - 1;
}
/**
* Get the slot the object instance referred to by given instruction is
* located in.
*
* @param ins
* the Instruction
* @param cpg
* the ConstantPoolGen for the method
* @return stack slot the object instance is in
* @throws DataflowAnalysisException
*/
public int getInstanceSlot(Instruction ins, ConstantPoolGen cpg)
throws DataflowAnalysisException {
if (!isValid()) {
throw new DataflowAnalysisException("Accessing invalid frame at "
+ ins);
}
int numConsumed = ins.consumeStack(cpg);
if (numConsumed == Constants.UNPREDICTABLE)
throw new DataflowAnalysisException(
"Unpredictable stack consumption in " + ins);
if (numConsumed > getStackDepth())
throw new DataflowAnalysisException("Stack underflow " + ins);
return getNumSlots() - numConsumed;
}
/**
* Get the number of arguments passed to given method invocation.
*
* @param ins
* the method invocation instruction
* @param cpg
* the ConstantPoolGen for the class containing the method
* @return number of arguments; note that this excludes the object instance
* for instance methods
* @throws DataflowAnalysisException
*/
public int getNumArguments(InvokeInstruction ins, ConstantPoolGen cpg)
throws DataflowAnalysisException {
SignatureParser parser = new SignatureParser(ins.getSignature(cpg));
return parser.getNumParameters();
}
/**
* Get the number of arguments passed to given method invocation, including
* the object instance if the call is to an instance method.
*
* @param ins
* the method invocation instruction
* @param cpg
* the ConstantPoolGen for the class containing the method
* @return number of arguments, including object instance if appropriate
* @throws DataflowAnalysisException
*/
public int getNumArgumentsIncludingObjectInstance(InvokeInstruction ins,
ConstantPoolGen cpg) throws DataflowAnalysisException {
int numConsumed = ins.consumeStack(cpg);
if (numConsumed == Constants.UNPREDICTABLE)
throw new DataflowAnalysisException(
"Unpredictable stack consumption in " + ins);
return numConsumed;
}
/**
* Get the <i>i</i>th argument passed to given method invocation.
*
* @param ins
* the method invocation instruction
* @param cpg
* the ConstantPoolGen for the class containing the method
* @param i
* index of the argument; 0 for the first argument, etc.
* @param numArguments
* total number of arguments to the method
* @return the <i>i</i>th argument
* @throws DataflowAnalysisException
*/
@Deprecated public ValueType getArgument(InvokeInstruction ins, ConstantPoolGen cpg,
int i, int numArguments) throws DataflowAnalysisException {
SignatureParser sigParser = new SignatureParser(ins.getSignature(cpg));
return getArgument(ins, cpg, i, sigParser );
}
/**
* Get the <i>i</i>th argument passed to given method invocation.
*
* @param ins
* the method invocation instruction
* @param cpg
* the ConstantPoolGen for the class containing the method
* @param i
* index of the argument; 0 for the first argument, etc.
* @return the <i>i</i>th argument
* @throws DataflowAnalysisException
*/
public ValueType getArgument(InvokeInstruction ins, ConstantPoolGen cpg,
int i, SignatureParser sigParser) throws DataflowAnalysisException {
if (i >= sigParser.getNumParameters())
throw new IllegalArgumentException("requesting parameter # " + i + " of " + sigParser);
return getStackValue(sigParser.getSlotsFromTopOfStackForParameter(i));
}
/**
* Get the stack slot that will contain given method argument. Assumes that
* this frame is at the location (just before) a method invocation
* instruction.
*
* @param i
* the argument index: 0 for first arg, etc.
* @param numArguments
* total number of arguments to the called method
* @return slot containing the argument value
*/
public int getArgumentSlot(int i, int numArguments) {
if (i >= numArguments)
throw new IllegalArgumentException();
return (slotList.size() - numArguments) + i;
}
/**
* Get the <i>i</i>th operand used by given instruction.
*
* @param ins
* the instruction, which must be a StackConsumer
* @param cpg
* the ConstantPoolGen
* @param i
* index of operand to get: 0 for the first operand, etc.
* @return the <i>i</i>th operand used by the given instruction
* @throws DataflowAnalysisException
*/
public ValueType getOperand(StackConsumer ins, ConstantPoolGen cpg, int i)
throws DataflowAnalysisException {
int numOperands = ins.consumeStack(cpg);
if (numOperands == Constants.UNPREDICTABLE)
throw new DataflowAnalysisException(
"Unpredictable stack consumption in " + ins);
return getStackValue((numOperands - 1) - i);
}
/**
* Get set of arguments passed to a method invocation which match given
* predicate.
*
* @param invokeInstruction
* the InvokeInstruction
* @param cpg
* the ConstantPoolGen
* @param chooser
* predicate to choose which argument values should be in the
* returned set
* @return BitSet specifying which arguments match the predicate, indexed by
* argument number (starting from 0)
* @throws DataflowAnalysisException
*/
public BitSet getArgumentSet(InvokeInstruction invokeInstruction,
ConstantPoolGen cpg, DataflowValueChooser<ValueType> chooser)
throws DataflowAnalysisException {
BitSet chosenArgSet = new BitSet();
SignatureParser sigParser = new SignatureParser(invokeInstruction.getSignature(cpg));
for (int i = 0; i < sigParser.getNumParameters(); ++i) {
ValueType value = getArgument(invokeInstruction, cpg, i,
sigParser);
if (chooser.choose(value))
chosenArgSet.set(i);
}
return chosenArgSet;
}
/**
* Clear the Java operand stack. Only local variable slots will remain in
* the frame.
*/
public void clearStack() {
if (!isValid())
throw new IllegalStateException("accessing top or bottom frame");
assert slotList.size() >= numLocals;
if (slotList.size() > numLocals)
slotList.subList(numLocals, slotList.size()).clear();
}
/**
* Get the depth of the Java operand stack.
*/
public int getStackDepth() {
return slotList.size() - numLocals;
}
/**
* Get the number of locals.
*/
public int getNumLocals() {
return numLocals;
}
/**
* Get the number of slots (locals plus stack values).
*/
public int getNumSlots() {
return slotList.size();
}
public boolean contains(ValueType value) {
if (!isValid())
throw new IllegalStateException("accessing top or bottom frame");
for(ValueType v : slotList)
if (v.equals(value)) return true;
return false;
}
/**
* Get the value at the <i>n</i>th slot.
*
* @param n
* the slot to get the value of
* @return the value in the slot
*/
public ValueType getValue(int n) {
if (!isValid())
throw new IllegalStateException("accessing top or bottom frame");
return slotList.get(n);
}
/**
* Set the value at the <i>n</i>th slot.
*
* @param n
* the slot in which to set a new value
* @param value
* the value to set
*/
public void setValue(int n, ValueType value) {
if (VERIFY_INTEGRITY && value == null)
throw new IllegalArgumentException();
if (!isValid())
throw new IllegalStateException("accessing top or bottom frame");
slotList.set(n, value);
}
/**
* Return true if this stack frame is the same as the one given as a
* parameter.
*
* @param other
* the other Frame
* @return true if the frames are the same, false otherwise
*/
public boolean sameAs(Frame<ValueType> other) {
if (isTop != other.isTop)
return false;
if (isTop && other.isTop)
return true;
if (isBottom != other.isBottom)
return false;
if (isBottom && other.isBottom)
return true;
if (getNumSlots() != other.getNumSlots())
return false;
for (int i = 0; i < getNumSlots(); ++i)
if (!getValue(i).equals(other.getValue(i)))
return false;
return true;
}
/**
* Make this Frame exactly the same as the one given as a parameter.
*
* @param other
* the Frame to make this object the same as
*/
public void copyFrom(Frame<ValueType> other) {
lastUpdateTimestamp = other.lastUpdateTimestamp;
slotList.clear();
slotList.addAll(other.slotList);
/* Andrei, 27.02.2008:
* "optimized" code below takes ~18% overall FB execution time, code above only 5%
int size = slotList.size();
if (size == other.slotList.size()) {
for (int i = 0; i < size; i++)
slotList.set(i, other.slotList.get(i));
} else {
slotList.clear();
for (ValueType v : other.slotList)
slotList.add(v);
} */
isTop = other.isTop;
isBottom = other.isBottom;
}
private static final boolean STACK_ONLY = SystemProperties
.getBoolean("dataflow.stackonly");
/**
* Convert to string.
*/
@Override
public String toString() {
if (isTop())
return "[TOP]";
if (isBottom())
return "[BOTTOM]";
StringBuilder buf = new StringBuilder();
buf.append('[');
int numSlots = getNumSlots();
int start = STACK_ONLY ? getNumLocals() : 0;
for (int i = start; i < numSlots; ++i) {
if (!STACK_ONLY && i == getNumLocals()) {
// Use a "|" character to visually separate locals from
// the operand stack.
int last = buf.length() - 1;
if (last >= 0) {
if (buf.charAt(last) == ',')
buf.deleteCharAt(last);
}
buf.append('|');
}
String value = valueToString(getValue(i));
if (i == numSlots - 1 && value.endsWith(","))
value = value.substring(0, value.length() - 1);
buf.append(value);
// buf.append(' ');
}
buf.append(']');
return buf.toString();
}
/**
* Subclasses may override this if they want to do something special to
* convert Value objects to Strings. By default, we just call toString() on
* the values.
*/
protected String valueToString(ValueType value) {
if (value == null) return "null";
return value.toString();
}
/**
* @return an unmodifiable Collection of the local variable and operand stack slots
*/
public Collection<ValueType> allSlots() {
if (slotList == null)
return Collections.<ValueType>emptyList();
return Collections.<ValueType>unmodifiableCollection(slotList);
}
/**
* @param lastUpdateTimestamp
* The lastUpdateTimestamp to set.
*/
public void setLastUpdateTimestamp(int lastUpdateTimestamp) {
this.lastUpdateTimestamp = lastUpdateTimestamp;
}
/**
* @return Returns the lastUpdateTimestamp.
*/
public int getLastUpdateTimestamp() {
return lastUpdateTimestamp;
}
}
// vim:ts=4
The table below shows all metrics for Frame.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 43.00 | Number of blocks | |
| BLOCK_COMMENT | 29.00 | Number of block comment lines | |
| COMMENTS | 335.00 | Comment lines | |
| COMMENT_DENSITY | 1.44 | Comment density | |
| COMPARISONS | 58.00 | Number of comparison operators | |
| CYCLOMATIC | 90.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 46.00 | Comments in declarations | |
| DOC_COMMENT | 296.00 | Number of javadoc comment lines | |
| ELOC | 233.00 | Effective lines of code | |
| EXEC_COMMENTS | 3.00 | Comments in executable code | |
| EXITS | 44.00 | Procedure exits | |
| FUNCTIONS | 37.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 65.41 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 116.00 | 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 | 1.00 | 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 | 1.00 | 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 | 37.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 2.00 | 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 | 3.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 12.00 | 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 | 4.00 | 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 | 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 | 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 | 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 | 877.00 | 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 | 1.00 | 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 | 3.00 | 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 | 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 | 674.00 | Number of lines in the source file | |
| LINE_COMMENT | 10.00 | Number of line comments | |
| LOC | 277.00 | Lines of code | |
| LOGICAL_LINES | 136.00 | Number of statements | |
| LOOPS | 5.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 620.00 | Number of operands | |
| OPERATORS | 1235.00 | Number of operators | |
| PARAMS | 39.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1855.00 | Halstead program length | |
| PROGRAM_VOCAB | 264.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 77.00 | Number of return points from functions | |
| SIZE | 20655.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 218.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 46.00 | Number of unique operators | |
| WHITESPACE | 62.00 | Number of whitespace lines | |