GeneralComparison.java
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net.sf.saxon.expr |
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Saxon |
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 | |
|---|---|---|
| LINE_COMMENT | Number of line comments |  |
| RETURNS | Number of return points from functions | |
| EXEC_COMMENTS | Comments in executable code | |
| SIZE | Size of the file in bytes | |
| DECL_COMMENTS | Comments in declarations | |
| OPERANDS | Number of operands | |
| CYCLOMATIC | Cyclomatic complexity | |
| EXITS | Procedure exits | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERATORS | Number of operators | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| LOGICAL_LINES | Number of statements | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| ELOC | Effective lines of code | |
| COMPARISONS | Number of comparison operators | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| BLOCKS | Number of blocks | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| LOC | Lines of code | |
| LINES | Number of lines in the source file | |
| UNIQUE_OPERATORS | Number of unique operators | |
| PROGRAM_VOLUME | Halstead program volume | |
| WHITESPACE | Number of whitespace lines | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
package net.sf.saxon.expr;
import net.sf.saxon.om.Item;
import net.sf.saxon.om.SequenceIterator;
import net.sf.saxon.sort.GenericAtomicComparer;
import net.sf.saxon.sort.CodepointCollator;
import net.sf.saxon.sort.AtomicComparer;
import net.sf.saxon.trans.DynamicError;
import net.sf.saxon.trans.StaticError;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.*;
import net.sf.saxon.value.*;
import net.sf.saxon.functions.Position;
import net.sf.saxon.functions.SystemFunction;
import net.sf.saxon.functions.Minimax;
import java.util.Comparator;
/**
* GeneralComparison: a boolean expression that compares two expressions
* for equals, not-equals, greater-than or less-than. This implements the operators
* =, !=, <, >, etc. This implementation is not used when in backwards-compatible mode
*/
public class GeneralComparison extends BinaryExpression implements ComparisonExpression {
protected int singletonOperator;
protected transient AtomicComparer comparer; // transient because not Serializable
/**
* Create a relational expression identifying the two operands and the operator
*
* @param p0 the left-hand operand
* @param op the operator, as a token returned by the Tokenizer (e.g. Token.LT)
* @param p1 the right-hand operand
*/
public GeneralComparison(Expression p0, int op, Expression p1) {
super(p0, op, p1);
singletonOperator = getSingletonOperator(op);
}
/**
* Get the AtomicComparer used to compare atomic values. This encapsulates any collation that is used
*/
public AtomicComparer getAtomicComparer() {
return comparer;
}
/**
* Get the primitive (singleton) operator used: one of Token.FEQ, Token.FNE, Token.FLT, Token.FGT,
* Token.FLE, Token.FGE
*/
public int getSingletonOperator() {
return singletonOperator;
}
/**
* Determine whether untyped atomic values should be converted to the type of the other operand
* @return true if untyped values should be converted to the type of the other operand, false if they
* should be converted to strings.
*/
public boolean convertsUntypedToOther() {
return true;
}
/**
* Determine the static cardinality. Returns [1..1]
*/
public int computeCardinality() {
return StaticProperty.EXACTLY_ONE;
}
/**
* Type-check the expression
*
* @return the checked expression
*/
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException {
final TypeHierarchy th = env.getConfiguration().getTypeHierarchy();
Expression oldOp0 = operand0;
Expression oldOp1 = operand1;
operand0 = operand0.typeCheck(env, contextItemType);
operand1 = operand1.typeCheck(env, contextItemType);
// If either operand is statically empty, return false
if (operand0 == EmptySequence.getInstance() || operand1 == EmptySequence.getInstance()) {
return BooleanValue.FALSE;
}
// Neither operand needs to be sorted
Optimizer opt = env.getConfiguration().getOptimizer();
operand0 = ExpressionTool.unsorted(opt, operand0, false);
operand1 = ExpressionTool.unsorted(opt, operand1, false);
SequenceType atomicType = SequenceType.ATOMIC_SEQUENCE;
RoleLocator role0 = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 0, null);
role0.setSourceLocator(this);
operand0 = TypeChecker.staticTypeCheck(operand0, atomicType, false, role0, env);
RoleLocator role1 = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 1, null);
role1.setSourceLocator(this);
operand1 = TypeChecker.staticTypeCheck(operand1, atomicType, false, role1, env);
if (operand0 != oldOp0) {
adoptChildExpression(operand0);
}
if (operand1 != oldOp1) {
adoptChildExpression(operand1);
}
ItemType t0 = operand0.getItemType(th); // this is always an atomic type
ItemType t1 = operand1.getItemType(th); // this is always an atomic type
int pt0 = t0.getPrimitiveType();
int pt1 = t1.getPrimitiveType();
int c0 = operand0.getCardinality();
int c1 = operand1.getCardinality();
if (c0 == StaticProperty.EMPTY || c1 == StaticProperty.EMPTY) {
return BooleanValue.FALSE;
}
if (t0 == Type.ANY_ATOMIC_TYPE || t0 == Type.UNTYPED_ATOMIC_TYPE ||
t1 == Type.ANY_ATOMIC_TYPE || t1 == Type.UNTYPED_ATOMIC_TYPE) {
// then no static type checking is possible
} else {
if (!Type.isComparable(pt0, pt1, Token.isOrderedOperator(singletonOperator))) {
StaticError err = new StaticError("Cannot compare " + t0.toString(env.getNamePool()) +
" to " + t1.toString(env.getNamePool()));
err.setErrorCode("XPTY0004");
err.setIsTypeError(true);
err.setLocator(this);
throw err;
}
}
if (c0 == StaticProperty.EXACTLY_ONE &&
c1 == StaticProperty.EXACTLY_ONE &&
t0 != Type.ANY_ATOMIC_TYPE &&
t1 != Type.ANY_ATOMIC_TYPE) {
// Use a value comparison if both arguments are singletons, and if the comparison operator to
// be used can be determined.
Expression e0 = operand0;
Expression e1 = operand1;
if (t0 == Type.UNTYPED_ATOMIC_TYPE) {
if (t1 == Type.UNTYPED_ATOMIC_TYPE) {
e0 = new CastExpression(operand0, Type.STRING_TYPE, false);
adoptChildExpression(e0);
e1 = new CastExpression(operand1, Type.STRING_TYPE, false);
adoptChildExpression(e1);
} else if (th.isSubType(t1, Type.NUMBER_TYPE)) {
e0 = new CastExpression(operand0, Type.DOUBLE_TYPE, false);
adoptChildExpression(e0);
} else {
e0 = new CastExpression(operand0, (AtomicType)t1, false);
adoptChildExpression(e0);
}
} else if (t1 == Type.UNTYPED_ATOMIC_TYPE) {
if (th.isSubType(t0, Type.NUMBER_TYPE)) {
e1 = new CastExpression(operand1, Type.DOUBLE_TYPE, false);
adoptChildExpression(e1);
} else {
e1 = new CastExpression(operand1, (AtomicType)t0, false);
adoptChildExpression(e1);
}
}
ValueComparison vc = new ValueComparison(e0, singletonOperator, e1);
ExpressionTool.copyLocationInfo(this, vc);
vc.setParentExpression(getParentExpression());
return vc.simplify(env).typeCheck(env, contextItemType);
}
Comparator collation = env.getCollation(env.getDefaultCollationName());
if (collation == null) {
collation = CodepointCollator.getInstance();
}
comparer = GenericAtomicComparer.makeAtomicComparer(pt0, pt1, collation, env.getConfiguration());
// evaluate the expression now if both arguments are constant
if ((operand0 instanceof Value) && (operand1 instanceof Value)) {
return (AtomicValue)evaluateItem(env.makeEarlyEvaluationContext());
}
return this;
}
private static Expression makeMinOrMax(Expression exp, StaticContext env, String function) {
FunctionCall fn = SystemFunction.makeSystemFunction(function, 1, env.getNamePool());
Expression[] args = {exp};
fn.setArguments(args);
((Minimax)fn).setIgnoreNaN(true);
return fn;
}
/**
* Optimize the expression
*
* @return the checked expression
*/
public Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException {
final TypeHierarchy th = env.getConfiguration().getTypeHierarchy();
operand0 = operand0.optimize(opt, env, contextItemType);
operand1 = operand1.optimize(opt, env, contextItemType);
// If either operand is statically empty, return false
if (operand0 == EmptySequence.getInstance() || operand1 == EmptySequence.getInstance()) {
return BooleanValue.FALSE;
}
// Neither operand needs to be sorted
operand0 = ExpressionTool.unsorted(opt, operand0, false);
operand1 = ExpressionTool.unsorted(opt, operand1, false);
ItemType t0 = operand0.getItemType(th);
ItemType t1 = operand1.getItemType(th);
int c0 = operand0.getCardinality();
int c1 = operand1.getCardinality();
// Check if neither argument allows a sequence of >1
if (!Cardinality.allowsMany(c0) && !Cardinality.allowsMany(c1)) {
// Use a singleton comparison if both arguments are singletons
SingletonComparison sc = new SingletonComparison(operand0, singletonOperator, operand1);
ExpressionTool.copyLocationInfo(this, sc);
sc.setParentExpression(getParentExpression());
sc.setComparator(comparer, env.makeEarlyEvaluationContext());
return sc.optimize(opt, env, contextItemType);
}
// see if second argument is a singleton...
if (!Cardinality.allowsMany(c0)) {
// if first argument is a singleton, reverse the arguments
GeneralComparison mc = getInverseComparison();
ExpressionTool.copyLocationInfo(this, mc);
mc.setParentExpression(getParentExpression());
mc.comparer = comparer;
return mc.optimize(opt, env, contextItemType);
}
if (c0 == StaticProperty.EXACTLY_ONE &&
c1 == StaticProperty.EXACTLY_ONE &&
t0 != Type.ANY_ATOMIC_TYPE &&
t1 != Type.ANY_ATOMIC_TYPE) {
// Use a value comparison if both arguments are singletons, and if the comparison operator to
// be used can be determined.
Expression e0 = operand0;
Expression e1 = operand1;
if (t0 == Type.UNTYPED_ATOMIC_TYPE) {
if (t1 == Type.UNTYPED_ATOMIC_TYPE) {
e0 = new CastExpression(operand0, Type.STRING_TYPE, false);
adoptChildExpression(e0);
e1 = new CastExpression(operand1, Type.STRING_TYPE, false);
adoptChildExpression(e1);
} else if (th.isSubType(t1, Type.NUMBER_TYPE)) {
e0 = new CastExpression(operand0, Type.DOUBLE_TYPE, false);
adoptChildExpression(e0);
} else {
e0 = new CastExpression(operand0, (AtomicType)t1, false);
adoptChildExpression(e0);
}
} else if (t1 == Type.UNTYPED_ATOMIC_TYPE) {
if (th.isSubType(t0, Type.NUMBER_TYPE)) {
e1 = new CastExpression(operand1, Type.DOUBLE_TYPE, false);
adoptChildExpression(e1);
} else {
e1 = new CastExpression(operand1, (AtomicType)t0, false);
adoptChildExpression(e1);
}
}
ValueComparison vc = new ValueComparison(e0, singletonOperator, e1);
ExpressionTool.copyLocationInfo(this, vc);
vc.setParentExpression(getParentExpression());
return vc.simplify(env).typeCheck(env, contextItemType).optimize(opt, env, contextItemType);
}
Comparator comp = env.getCollation(env.getDefaultCollationName());
if (comp == null) {
comp = CodepointCollator.getInstance();
}
int pt0 = t0.getPrimitiveType();
int pt1 = t1.getPrimitiveType();
comparer = GenericAtomicComparer.makeAtomicComparer(pt0, pt1, comp, env.getConfiguration());
// If the operator is gt, ge, lt, le then replace X < Y by min(X) < max(Y) or
// by (some $x in X satisfies $x lt Y)
// This optimization is done only in the case where at least one of the
// sequences is known to be purely numeric. It isn't safe if both sequences
// contain untyped atomic values, because in that case, the type of the
// comparison isn't known in advance. For example [(1, U1) < ("fred", U2)]
// involves both string and numeric comparisons.
if (operator != Token.EQUALS && operator != Token.NE &&
(th.isSubType(t0, Type.NUMBER_TYPE) || th.isSubType(t1, Type.NUMBER_TYPE))) {
Expression e0 = operand0;
if (!th.isSubType(t0, Type.NUMBER_TYPE)) {
RoleLocator role = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 0, null);
role.setSourceLocator(this);
e0 = TypeChecker.staticTypeCheck(e0, SequenceType.NUMERIC_SEQUENCE, false, role, env);
}
Expression e1 = operand1;
if (!th.isSubType(t1, Type.NUMBER_TYPE)) {
RoleLocator role = new RoleLocator(RoleLocator.BINARY_EXPR, Token.tokens[operator], 1, null);
role.setSourceLocator(this);
e1 = TypeChecker.staticTypeCheck(e1, SequenceType.NUMERIC_SEQUENCE, false, role, env);
}
if (c1 == StaticProperty.EXACTLY_ONE) {
// If second operand is a singleton, rewrite as
// some $x in E0 satisfies $x op E1
// System.err.println("** using quantified optimization R **");
RangeVariableDeclaration decl = new RangeVariableDeclaration();
decl.setVariableName("qq:" + decl.hashCode());
SequenceType type = SequenceType.makeSequenceType(e0.getItemType(th), StaticProperty.EXACTLY_ONE);
decl.setRequiredType(type);
VariableReference var = new VariableReference(decl);
ValueComparison vc = new ValueComparison(var, singletonOperator, e1);
QuantifiedExpression qe = new QuantifiedExpression();
qe.setOperator(Token.SOME);
qe.setVariableDeclaration(decl);
qe.setSequence(e0);
qe.setAction(vc);
qe.setLocationId(getLocationId());
qe.setParentExpression(getParentExpression());
return qe.typeCheck(env, contextItemType);
} else {
// If neither operand is known to be a singleton, rewrite as (for example)
// min(E0) op max(E1)
// System.err.println("** using minimax optimization **");
ValueComparison vc;
switch(operator) {
case Token.LT:
case Token.LE:
vc = new ValueComparison(makeMinOrMax(e0, env, "min"),
singletonOperator,
makeMinOrMax(e1, env, "max"));
vc.setResultWhenEmpty(BooleanValue.FALSE);
break;
case Token.GT:
case Token.GE:
vc = new ValueComparison(makeMinOrMax(e0, env, "max"),
singletonOperator,
makeMinOrMax(e1, env, "min"));
vc.setResultWhenEmpty(BooleanValue.FALSE);
break;
default:
throw new UnsupportedOperationException("Unknown operator " + operator);
}
ExpressionTool.copyLocationInfo(this, vc);
vc.setParentExpression(getParentExpression());
return vc.typeCheck(env, contextItemType);
}
}
// look for (N to M = I)
if (operand0 instanceof RangeExpression &&
th.isSubType(operand1.getItemType(th), Type.INTEGER_TYPE) &&
!Cardinality.allowsMany(operand1.getCardinality())) {
Expression min = ((RangeExpression)operand0).operand0;
Expression max = ((RangeExpression)operand0).operand1;
if (operand1 instanceof Position) {
PositionRange pr = new PositionRange(min, max);
ExpressionTool.copyLocationInfo(this, pr);
pr.setParentExpression(getParentExpression());
return pr;
} else {
IntegerRangeTest ir = new IntegerRangeTest(operand1, min, max);
ExpressionTool.copyLocationInfo(this, ir);
ir.setParentExpression(getParentExpression());
return ir;
}
}
if (operand0 instanceof IntegerRange &&
th.isSubType(operand1.getItemType(th), Type.INTEGER_TYPE) &&
!Cardinality.allowsMany(operand1.getCardinality())) {
long min = ((IntegerRange)operand0).getStart();
long max = ((IntegerRange)operand0).getEnd();
if (operand1 instanceof Position) {
PositionRange pr = new PositionRange(new IntegerValue(min), new IntegerValue(max));
ExpressionTool.copyLocationInfo(this, pr);
pr.setParentExpression(getParentExpression());
return pr;
} else {
IntegerRangeTest ir = new IntegerRangeTest(operand1, new IntegerValue(min), new IntegerValue(max));
ExpressionTool.copyLocationInfo(this, ir);
ir.setParentExpression(getParentExpression());
return ir;
}
}
// evaluate the expression now if both arguments are constant
if ((operand0 instanceof Value) && (operand1 instanceof Value)) {
return (AtomicValue)evaluateItem(env.makeEarlyEvaluationContext());
}
return this;
}
/**
* Evaluate the expression in a given context
*
* @param context the given context for evaluation
* @return a BooleanValue representing the result of the numeric comparison of the two operands
*/
public Item evaluateItem(XPathContext context) throws XPathException {
return BooleanValue.get(effectiveBooleanValue(context));
}
/**
* Evaluate the expression in a boolean context
*
* @param context the given context for evaluation
* @return a boolean representing the result of the numeric comparison of the two operands
*/
public boolean effectiveBooleanValue(XPathContext context) throws XPathException {
try {
SequenceIterator iter1 = operand0.iterate(context);
SequenceIterator iter2 = operand1.iterate(context);
Value seq2 = (Value)SequenceExtent.makeSequenceExtent(iter2);
// we choose seq2 because it's more likely to be a singleton
int count2 = seq2.getLength();
if (count2 == 0) {
return false;
}
if (count2 == 1) {
AtomicValue s2 = (AtomicValue)seq2.itemAt(0);
while (true) {
AtomicValue s1 = (AtomicValue)iter1.next();
if (s1 == null) {
break;
}
if (compare(s1, singletonOperator, s2, comparer, context)) {
return true;
}
}
return false;
}
while (true) {
AtomicValue s1 = (AtomicValue)iter1.next();
if (s1 == null) {
break;
}
SequenceIterator e2 = seq2.iterate(null);
while (true) {
AtomicValue s2 = (AtomicValue)e2.next();
if (s2 == null) {
break;
}
if (compare(s1, singletonOperator, s2, comparer, context)) {
return true;
}
}
}
return false;
} catch (DynamicError e) {
// re-throw the exception with location information added
if (e.getXPathContext() == null) {
e.setXPathContext(context);
}
if (e.getLocator() == null) {
e.setLocator(this);
}
throw e;
} catch (ValidationException e) {
DynamicError err = new DynamicError(e);
err.setXPathContext(context);
if (e.getLineNumber() == -1) {
err.setLocator(this);
} else {
err.setLocator(e);
}
err.setErrorCode(e.getErrorCodeLocalPart());
throw err;
}
}
/**
* Compare two atomic values
*/
protected static boolean compare(AtomicValue a1,
int operator,
AtomicValue a2,
AtomicComparer comparer,
XPathContext context) throws XPathException {
AtomicValue v1 = a1;
AtomicValue v2 = a2;
if (a1 instanceof UntypedAtomicValue) {
if (a2 instanceof NumericValue) {
v1 = a1.convert(Type.DOUBLE, context);
} else if (a2 instanceof UntypedAtomicValue) {
// the spec says convert it to a string, but this doesn't affect the outcome
} else {
final TypeHierarchy th = context.getConfiguration().getTypeHierarchy();
v1 = a1.convert(a2.getItemType(th).getPrimitiveType(), context);
}
}
if (a2 instanceof UntypedAtomicValue) {
if (a1 instanceof NumericValue) {
v2 = a2.convert(Type.DOUBLE, context);
} else if (a1 instanceof UntypedAtomicValue) {
// the spec says convert it to a string, but this doesn't affect the outcome
} else {
final TypeHierarchy th = context.getConfiguration().getTypeHierarchy();
v2 = a2.convert(a1.getItemType(th).getPrimitiveType(), context);
}
}
return ValueComparison.compare(v1, operator, v2, comparer);
}
/**
* Determine the data type of the expression
*
* @return Type.BOOLEAN
* @param th
*/
public ItemType getItemType(TypeHierarchy th) {
return Type.BOOLEAN_TYPE;
}
/**
* Return the singleton form of the comparison operator, e.g. FEQ for EQUALS, FGT for GT
*/
private static int getSingletonOperator(int op) {
switch (op) {
case Token.EQUALS:
return Token.FEQ;
case Token.GE:
return Token.FGE;
case Token.NE:
return Token.FNE;
case Token.LT:
return Token.FLT;
case Token.GT:
return Token.FGT;
case Token.LE:
return Token.FLE;
default:
return op;
}
}
protected GeneralComparison getInverseComparison() {
return new GeneralComparison(operand1, Token.inverse(operator), operand0);
}
protected String displayOperator() {
return "many-to-many " + super.displayOperator();
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//
The table below shows all metrics for GeneralComparison.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 81.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 111.00 | Comment lines | |
| COMMENT_DENSITY | 0.32 | Comment density | |
| COMPARISONS | 60.00 | Number of comparison operators | |
| CYCLOMATIC | 101.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 30.00 | Comments in declarations | |
| DOC_COMMENT | 61.00 | Number of javadoc comment lines | |
| ELOC | 342.00 | Effective lines of code | |
| EXEC_COMMENTS | 24.00 | Comments in executable code | |
| EXITS | 74.00 | Procedure exits | |
| FUNCTIONS | 15.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 109.42 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 102.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 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 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 0.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 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 | 6.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 5.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 5.00 | 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 | 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 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 1.00 | 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 | 1.00 | 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 | 634.00 | Number of lines in the source file | |
| LINE_COMMENT | 50.00 | Number of line comments | |
| LOC | 407.00 | Lines of code | |
| LOGICAL_LINES | 225.00 | Number of statements | |
| LOOPS | 3.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 1170.00 | Number of operands | |
| OPERATORS | 2040.00 | Number of operators | |
| PARAMS | 20.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 3210.00 | Halstead program length | |
| PROGRAM_VOCAB | 330.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 82.00 | Number of return points from functions | |
| SIZE | 24309.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 278.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 52.00 | Number of unique operators | |
| WHITESPACE | 116.00 | Number of whitespace lines | |