JoinSetComposerFactoryImpl.java
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com.espertech.esper.epl.join |
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Esper |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| JAVA0144 | JAVA0144 Line exceeds maximum M characters |  |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| LOOPS | Number of loops | |
| SIZE | Size of the file in bytes | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| FUNCTIONS | Number of function declarations | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| DECL_COMMENTS | Comments in declarations | |
| COMMENTS | Comment lines | |
| WHITESPACE | Number of whitespace lines | |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| LINE_COMMENT | Number of line comments | |
| RETURNS | Number of return points from functions | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/**************************************************************************************
* Copyright (C) 2006 Esper Team. All rights reserved. *
* http://esper.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package com.espertech.esper.epl.join;
import com.espertech.esper.collection.Pair;
import com.espertech.esper.epl.expression.ExprAndNode;
import com.espertech.esper.epl.expression.ExprEqualsNode;
import com.espertech.esper.epl.expression.ExprNode;
import com.espertech.esper.epl.expression.ExprValidationException;
import com.espertech.esper.epl.join.exec.ExecNode;
import com.espertech.esper.epl.join.plan.*;
import com.espertech.esper.epl.join.table.EventTable;
import com.espertech.esper.epl.join.table.PropertyIndTableCoerceAll;
import com.espertech.esper.epl.join.table.PropertyIndexedEventTable;
import com.espertech.esper.epl.join.table.UnindexedEventTable;
import com.espertech.esper.epl.spec.OuterJoinDesc;
import com.espertech.esper.epl.spec.SelectClauseStreamSelectorEnum;
import com.espertech.esper.event.EventType;
import com.espertech.esper.type.OuterJoinType;
import com.espertech.esper.util.JavaClassHelper;
import com.espertech.esper.view.HistoricalEventViewable;
import com.espertech.esper.view.Viewable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.List;
/**
* Factory for building a {@link JoinSetComposer} from analyzing filter nodes, for
* fast join tuple result set composition.
*/
public class JoinSetComposerFactoryImpl implements JoinSetComposerFactory
{
/**
* Builds join tuple composer.
* @param outerJoinDescList - list of descriptors for outer join criteria
* @param optionalFilterNode - filter tree for analysis to build indexes for fast access
* @param streamTypes - types of streams
* @param streamNames - names of streams
* @param streamViews - leaf view per stream
* @param selectStreamSelectorEnum - indicator for rstream or istream-only, for optimization
* @return composer implementation
* @throws ExprValidationException is thrown to indicate that
* validation of view use in joins failed.
*/
public JoinSetComposer makeComposer(List<OuterJoinDesc> outerJoinDescList,
ExprNode optionalFilterNode,
EventType[] streamTypes,
String[] streamNames,
Viewable[] streamViews,
SelectClauseStreamSelectorEnum selectStreamSelectorEnum,
boolean[] isUnidirectional,
boolean[] hasChildViews)
throws ExprValidationException
{
// Determine if there is a historical
boolean hasHistorical = false;
for (int i = 0; i < streamViews.length; i++)
{
if (streamViews[i] instanceof HistoricalEventViewable)
{
if (hasHistorical)
{
throw new ExprValidationException("Joins between historical data streams are not supported");
}
hasHistorical = true;
if (streamTypes.length > 2)
{
throw new ExprValidationException("Joins between historical data require a only one event stream in the join");
}
}
}
EventTable[][] indexes;
QueryStrategy[] queryStrategies;
// Handle a join with a database or other historical data source
if (hasHistorical)
{
Pair<EventTable[][], QueryStrategy[]> indexAndStrategies =
makeComposerHistorical(outerJoinDescList, optionalFilterNode, streamTypes, streamViews);
indexes = indexAndStrategies.getFirst();
queryStrategies = indexAndStrategies.getSecond();
return new JoinSetComposerImpl(indexes, queryStrategies, selectStreamSelectorEnum);
}
// Determine if any stream has a unidirectional keyword
int unidirectionalStreamNumber = -1;
for (int i = 0; i < isUnidirectional.length; i++)
{
if (isUnidirectional[i])
{
if (unidirectionalStreamNumber != -1)
{
throw new ExprValidationException("The unidirectional keyword can only apply to one stream in a join");
}
unidirectionalStreamNumber = i;
}
}
if ((unidirectionalStreamNumber != -1) && (hasChildViews[unidirectionalStreamNumber]))
{
throw new ExprValidationException("The unidirectional keyword requires that no views are declared onto the stream");
}
QueryPlan queryPlan = QueryPlanBuilder.getPlan(streamTypes, outerJoinDescList, optionalFilterNode, streamNames);
// Build indexes
QueryPlanIndex[] indexSpecs = queryPlan.getIndexSpecs();
indexes = new EventTable[indexSpecs.length][];
for (int streamNo = 0; streamNo < indexSpecs.length; streamNo++)
{
String[][] indexProps = indexSpecs[streamNo].getIndexProps();
Class[][] coercionTypes = indexSpecs[streamNo].getCoercionTypesPerIndex();
indexes[streamNo] = new EventTable[indexProps.length];
for (int indexNo = 0; indexNo < indexProps.length; indexNo++)
{
indexes[streamNo][indexNo] = buildIndex(streamNo, indexProps[indexNo], coercionTypes[indexNo], streamTypes[streamNo]);
}
}
// Build strategies
QueryPlanNode[] queryExecSpecs = queryPlan.getExecNodeSpecs();
queryStrategies = new QueryStrategy[queryExecSpecs.length];
for (int i = 0; i < queryExecSpecs.length; i++)
{
QueryPlanNode planNode = queryExecSpecs[i];
ExecNode executionNode = planNode.makeExec(indexes, streamTypes);
if (log.isDebugEnabled())
{
log.debug(".makeComposer Execution nodes for stream " + i + " '" + streamNames[i] +
"' : \n" + ExecNode.print(executionNode));
}
queryStrategies[i] = new ExecNodeQueryStrategy(i, streamTypes.length, executionNode);
}
// If all streams have views, normal business is a query plan for each stream
if (unidirectionalStreamNumber == -1)
{
return new JoinSetComposerImpl(indexes, queryStrategies, selectStreamSelectorEnum);
}
else
{
return new JoinSetComposerStreamToWinImpl(indexes, unidirectionalStreamNumber, queryStrategies[unidirectionalStreamNumber]);
}
}
private Pair<EventTable[][], QueryStrategy[]> makeComposerHistorical(List<OuterJoinDesc> outerJoinDescList,
ExprNode optionalFilterNode,
EventType[] streamTypes,
Viewable[] streamViews)
throws ExprValidationException
{
EventTable[][] indexes;
QueryStrategy[] queryStrategies;
// No tables for any streams
indexes = new EventTable[streamTypes.length][];
queryStrategies = new QueryStrategy[streamTypes.length];
for (int streamNo = 0; streamNo < streamTypes.length; streamNo++)
{
indexes[streamNo] = new EventTable[0];
}
int polledView = 0;
int streamView = 1;
if (streamViews[1] instanceof HistoricalEventViewable)
{
streamView = 0;
polledView = 1;
}
// Build an outer join expression node
boolean isOuterJoin = false;
ExprEqualsNode outerJoinEqualsNode = null;
if (!outerJoinDescList.isEmpty())
{
OuterJoinDesc outerJoinDesc = outerJoinDescList.get(0);
if (outerJoinDesc.getOuterJoinType().equals(OuterJoinType.FULL))
{
isOuterJoin = true;
}
else if ((outerJoinDesc.getOuterJoinType().equals(OuterJoinType.LEFT)) &&
(streamView == 0))
{
isOuterJoin = true;
}
else if ((outerJoinDesc.getOuterJoinType().equals(OuterJoinType.RIGHT)) &&
(streamView == 1))
{
isOuterJoin = true;
}
outerJoinEqualsNode = new ExprEqualsNode(false);
outerJoinEqualsNode.addChildNode(outerJoinDesc.getLeftNode());
outerJoinEqualsNode.addChildNode(outerJoinDesc.getRightNode());
outerJoinEqualsNode.validate(null, null, null, null, null);
}
// Determine filter for indexing purposes
ExprNode filterForIndexing = null;
if ((outerJoinEqualsNode != null) && (optionalFilterNode != null)) // both filter and outer join, add
{
filterForIndexing = new ExprAndNode();
filterForIndexing.addChildNode(optionalFilterNode);
filterForIndexing.addChildNode(outerJoinEqualsNode);
}
else if ((outerJoinEqualsNode == null) && (optionalFilterNode != null))
{
filterForIndexing = optionalFilterNode;
}
else if (outerJoinEqualsNode != null)
{
filterForIndexing = outerJoinEqualsNode;
}
Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy> indexStrategies =
determineIndexing(filterForIndexing, streamTypes[polledView], streamTypes[streamView], polledView, streamView);
HistoricalEventViewable viewable = (HistoricalEventViewable) streamViews[polledView];
queryStrategies[streamView] = new HistoricalDataQueryStrategy(streamView, polledView, viewable, isOuterJoin, outerJoinEqualsNode,
indexStrategies.getFirst(), indexStrategies.getSecond());
return new Pair<EventTable[][], QueryStrategy[]>(indexes, queryStrategies);
}
private Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy> determineIndexing(ExprNode filterForIndexing,
EventType polledViewType,
EventType streamViewType,
int polledViewStreamNum,
int streamViewStreamNum)
{
// No filter means unindexed event tables
if (filterForIndexing == null)
{
return new Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy>(
new HistoricalIndexLookupStrategyNoIndex(), new PollResultIndexingStrategyNoIndex());
}
// analyze query graph; Whereas stream0=named window, stream1=delete-expr filter
QueryGraph queryGraph = new QueryGraph(2);
FilterExprAnalyzer.analyze(filterForIndexing, queryGraph);
// index and key property names
String[] keyPropertiesJoin = queryGraph.getKeyProperties(streamViewStreamNum, polledViewStreamNum);
String[] indexPropertiesJoin = queryGraph.getIndexProperties(streamViewStreamNum, polledViewStreamNum);
// If the analysis revealed no join columns, must use the brute-force full table scan
if ((keyPropertiesJoin == null) || (keyPropertiesJoin.length == 0))
{
return new Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy>(
new HistoricalIndexLookupStrategyNoIndex(), new PollResultIndexingStrategyNoIndex());
}
// Build a set of index descriptors with property name and coercion type
boolean mustCoerce = false;
Class[] coercionTypes = new Class[indexPropertiesJoin.length];
for (int i = 0; i < keyPropertiesJoin.length; i++)
{
Class keyPropType = JavaClassHelper.getBoxedType(streamViewType.getPropertyType(keyPropertiesJoin[i]));
Class indexedPropType = JavaClassHelper.getBoxedType(polledViewType.getPropertyType(indexPropertiesJoin[i]));
Class coercionType = indexedPropType;
if (keyPropType != indexedPropType)
{
coercionType = JavaClassHelper.getCompareToCoercionType(keyPropType, keyPropType);
mustCoerce = true;
}
coercionTypes[i] = coercionType;
}
// No coercion
if (!mustCoerce)
{
PollResultIndexingStrategyIndex indexing = new PollResultIndexingStrategyIndex(polledViewStreamNum, polledViewType, indexPropertiesJoin);
HistoricalIndexLookupStrategy strategy = new HistoricalIndexLookupStrategyIndex(streamViewType, keyPropertiesJoin);
return new Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy>(strategy, indexing);
}
// With coercion, same lookup strategy as the index coerces
PollResultIndexingStrategy indexing = new PollResultIndexingStrategyIndexCoerce(polledViewStreamNum, polledViewType, indexPropertiesJoin, coercionTypes);
HistoricalIndexLookupStrategy strategy = new HistoricalIndexLookupStrategyIndex(streamViewType, keyPropertiesJoin);
return new Pair<HistoricalIndexLookupStrategy, PollResultIndexingStrategy>(strategy, indexing);
}
/**
* Build an index/table instance using the event properties for the event type.
* @param indexedStreamNum - number of stream indexed
* @param indexProps - properties to index
* @param optCoercionTypes - optional array of coercion types, or null if no coercion is required
* @param eventType - type of event to expect
* @return table build
*/
protected static EventTable buildIndex(int indexedStreamNum, String[] indexProps, Class[] optCoercionTypes, EventType eventType)
{
EventTable table = null;
if (indexProps.length == 0)
{
table = new UnindexedEventTable(indexedStreamNum);
}
else
{
if (optCoercionTypes == null)
{
table = new PropertyIndexedEventTable(indexedStreamNum, eventType, indexProps);
}
else
{
table = new PropertyIndTableCoerceAll(indexedStreamNum, eventType, indexProps, optCoercionTypes);
}
}
return table;
}
private static final Log log = LogFactory.getLog(JoinSetComposerFactoryImpl.class);
}
The table below shows all metrics for JoinSetComposerFactoryImpl.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 37.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 47.00 | Comment lines | |
| COMMENT_DENSITY | 0.28 | Comment density | |
| COMPARISONS | 30.00 | Number of comparison operators | |
| CYCLOMATIC | 40.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 4.00 | Comments in declarations | |
| DOC_COMMENT | 31.00 | Number of javadoc comment lines | |
| ELOC | 168.00 | Effective lines of code | |
| EXEC_COMMENTS | 16.00 | Comments in executable code | |
| EXITS | 31.00 | Procedure exits | |
| FUNCTIONS | 4.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 75.43 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 37.00 | 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 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 1.00 | 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 | 1.00 | 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 | 5.00 | 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 | 4.00 | 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 | 1.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 324.00 | Number of lines in the source file | |
| LINE_COMMENT | 16.00 | Number of line comments | |
| LOC | 244.00 | Lines of code | |
| LOGICAL_LINES | 120.00 | Number of statements | |
| LOOPS | 7.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 621.00 | Number of operands | |
| OPERATORS | 1103.00 | Number of operators | |
| PARAMS | 21.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1724.00 | Halstead program length | |
| PROGRAM_VOCAB | 220.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 16.00 | Number of return points from functions | |
| SIZE | 15651.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 177.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 43.00 | Number of unique operators | |
| WHITESPACE | 33.00 | Number of whitespace lines | |