GenericStatementContext.java

Index Score
org.apache.derby.impl.sql.conn
Apache Derby

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.

MetricDescription
DECL_COMMENTSComments in declarations
COMMENTSComment lines
DOC_COMMENTNumber of javadoc comment lines
LINE_COMMENTNumber of line comments
LINESNumber of lines in the source file
EXEC_COMMENTSComments in executable code
SIZESize of the file in bytes
CYCLOMATICCyclomatic complexity
RETURNSNumber of return points from functions
LOCLines of code
BLOCKSNumber of blocks
FUNCTIONSNumber of function declarations
JAVA0110JAVA0110 Incorrect javadoc: no @return tag
INTERFACE_COMPLEXITYInterface complexity
JAVA0075JAVA0075 Method parameter hides field
UNIQUE_OPERATORSNumber of unique operators
ELOCEffective lines of code
JAVA0117JAVA0117 Missing javadoc: method 'method'
JAVA0128JAVA0128 Public constructor in non-public class
LOGICAL_LINESNumber of statements
PROGRAM_VOCABHalstead program vocabulary
PROGRAM_VOLUMEHalstead program volume
JAVA0136JAVA0136 N methods defined in class (maximum: M)
JAVA0288JAVA0288 Inconsistent null check
JAVA0126JAVA0126 Method declares unchecked exception in throws
OPERATORSNumber of operators
JAVA0285JAVA0285 Dereference of potentially null variable
JAVA0034JAVA0034 Missing braces in if statement
UNIQUE_OPERANDSNumber of unique operands
PROGRAM_LENGTHHalstead program length
BLOCK_COMMENTNumber of block comment lines
JAVA0100JAVA0100 Class contains N non-final fields (maximum: M)
JAVA0254JAVA0254 Use enhanced for loop construct instead of Iterator
JAVA0270JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array
NEST_DEPTHMaximum nesting depth
/* Derby - Class org.apache.derby.impl.sql.conn.GenericStatementContext Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package org.apache.derby.impl.sql.conn; import org.apache.derby.iapi.services.context.Context; import org.apache.derby.iapi.services.sanity.SanityManager; import org.apache.derby.iapi.services.monitor.Monitor; import org.apache.derby.iapi.services.timer.TimerFactory; import org.apache.derby.iapi.error.StandardException; import org.apache.derby.iapi.sql.conn.LanguageConnectionContext; import org.apache.derby.iapi.sql.conn.StatementContext; import org.apache.derby.iapi.sql.conn.SQLSessionContext; import org.apache.derby.iapi.sql.depend.Dependency; import org.apache.derby.iapi.sql.depend.DependencyManager; import org.apache.derby.iapi.sql.execute.NoPutResultSet; import org.apache.derby.iapi.sql.Activation; import org.apache.derby.iapi.sql.ResultSet; import org.apache.derby.iapi.sql.ParameterValueSet; import org.apache.derby.iapi.store.access.TransactionController; import org.apache.derby.iapi.services.context.ContextImpl; import org.apache.derby.iapi.error.ExceptionSeverity; import org.apache.derby.iapi.reference.SQLState; import java.util.ArrayList; import java.util.Iterator; import java.util.Timer; import java.util.TimerTask; import java.sql.SQLException; /** * GenericStatementContext is pushed/popped around a statement prepare and execute * so that any statement specific clean up can be performed. * * */ final class GenericStatementContext extends ContextImpl implements StatementContext { private boolean setSavePoint; private String internalSavePointName; private ResultSet topResultSet; private ArrayList dependencies; private NoPutResultSet[] subqueryTrackingArray; private NoPutResultSet[] materializedSubqueries; private final LanguageConnectionContext lcc; private boolean inUse = true; // This flag satisfies all the conditions // for using volatile instead of synchronized. // (Source: Doug Lea, Concurrent Programming in Java, Second Edition, // section 2.2.7.4, page 97) // true if statement has been cancelled private volatile boolean cancellationFlag = false; // Reference to the TimerTask that will time out this statement. // Needed for stopping the task when execution completes before timeout. private CancelQueryTask cancelTask = null; private boolean parentInTrigger; // whetherparent started with a trigger on stack private boolean isForReadOnly = false; private boolean isAtomic; private boolean isSystemCode; private boolean rollbackParentContext; private String stmtText; private ParameterValueSet pvs; /** Set to one of RoutineAliasInfo.{MODIFIES_SQL_DATA, READS_SQL_DATA, CONTAINS_SQL, NO_SQL} */ private short sqlAllowed = -1; /** * The activation associated with this context, or null */ private Activation activation; /** * The SQLSessionContext associated with a statement context. */ private SQLSessionContext sqlSessionContext; /* constructor @param tc transaction */ GenericStatementContext(LanguageConnectionContext lcc) { super(lcc.getContextManager(), org.apache.derby.iapi.reference.ContextId.LANG_STATEMENT); this.lcc = lcc; if (SanityManager.DEBUG) { SanityManager.ASSERT((lcc != null), "Failed to get language connection context"); } internalSavePointName = lcc.getUniqueSavepointName(); } /** * This is a TimerTask that is responsible for timing out statements, * typically when an application has called Statement.setQueryTimeout(). * * When the application invokes execute() on a statement object, or * fetches data on a ResultSet, a StatementContext object is allocated * for the duration of the execution in the engine (until control is * returned to the application). * * When the StatementContext object is assigned with setInUse(), * a CancelQueryTask is scheduled if a timeout > 0 has been set. */ private static class CancelQueryTask extends TimerTask { /** * Reference to the StatementContext for the executing statement * which might time out. */ private StatementContext statementContext; /** * Initializes a new task for timing out a statement's execution. * This does not schedule it for execution, the caller is * responsible for calling Timer.schedule() with this object * as parameter. */ public CancelQueryTask(StatementContext ctx) { statementContext = ctx; } /** * Invoked by a Timer class to cancel an executing statement. * This method just sets a volatile flag in the associated * StatementContext object by calling StatementContext.cancel(); * it is the responsibility of the thread executing the statement * to check this flag regularly. */ public void run() { synchronized (this) { if (statementContext != null) { statementContext.cancel(); } } } /** * Stops this task and prevents it from cancelling a statement. * Guarantees that after this method returns, the associated * StatementContext object will not be tampered with by this task. * Thus, the StatementContext object may safely be allocated to * other executing statements. */ public void forgetContext() { synchronized (this) { statementContext = null; } cancel(); } } // StatementContext Interface public void setInUse ( boolean parentInTrigger, boolean isAtomic, boolean isForReadOnly, String stmtText, ParameterValueSet pvs, long timeoutMillis ) { inUse = true; this.parentInTrigger = parentInTrigger; this.isForReadOnly = isForReadOnly; this.isAtomic = isAtomic; this.stmtText = stmtText; this.pvs = pvs; rollbackParentContext = false; if (timeoutMillis > 0) { TimerFactory factory = Monitor.getMonitor().getTimerFactory(); Timer timer = factory.getCancellationTimer(); cancelTask = new CancelQueryTask(this); timer.schedule(cancelTask, timeoutMillis); } } public void clearInUse() { /* We must clear out the current top ResultSet to prepare for * reusing a StatementContext. */ stuffTopResultSet( null, null ); inUse = false; parentInTrigger = false; isAtomic = false; isForReadOnly = false; this.stmtText = null; sqlAllowed = -1; isSystemCode = false; rollbackParentContext = false; if (cancelTask != null) { cancelTask.forgetContext(); cancelTask = null; } cancellationFlag = false; activation = null; sqlSessionContext = null; } /** * @see StatementContext#setSavePoint * @exception StandardException Thrown on error */ public void setSavePoint() throws StandardException { if (SanityManager.DEBUG) { if (SanityManager.DEBUG_ON("traceSavepoints")) { SanityManager.DEBUG_PRINT( "GenericStatementContext.setSavePoint()", internalSavePointName); } } pleaseBeOnStack(); lcc.getTransactionExecute().setSavePoint(internalSavePointName, null); setSavePoint = true; } /** * Resets the savepoint to the current spot if it is * set, otherwise, noop. Used when a commit is * done on a nested connection. * * @see StatementContext#resetSavePoint * @exception StandardException Thrown on error */ public void resetSavePoint() throws StandardException { if (SanityManager.DEBUG) { if (SanityManager.DEBUG_ON("traceSavepoints")) { SanityManager.DEBUG_PRINT( "GenericStatementContext.resetSavePoint()", internalSavePointName); } } if (inUse && setSavePoint) { // RESOLVE PLUGIN ???. For the plugin, there will be no transaction controller lcc.getTransactionExecute().setSavePoint(internalSavePointName, null); // stage buffer management } } /** * @see StatementContext#clearSavePoint * @exception StandardException Thrown on error */ public void clearSavePoint() throws StandardException { if (SanityManager.DEBUG) { if (SanityManager.DEBUG_ON("traceSavepoints")) { SanityManager.DEBUG_PRINT("GenericStatementContext.clearSavePoint()", internalSavePointName); } } pleaseBeOnStack(); if (SanityManager.DEBUG) { SanityManager.ASSERT(setSavePoint, "setSavePoint is expected to be true"); } // RESOLVE PLUGIN ???. For the plugin, there will be no transaction controller lcc.getTransactionExecute().releaseSavePoint(internalSavePointName, null); setSavePoint = false; } /** * Set the top ResultSet in the ResultSet tree for close down on * an error. * * @exception StandardException thrown on error. */ public void setTopResultSet(ResultSet topResultSet, NoPutResultSet[] subqueryTrackingArray) throws StandardException { pleaseBeOnStack(); /* We have to handle both materialize and non-materialized subqueries. * Materialized subqueries are attached before the top result set is * set. If there are any, then we must copy them into the new * subqueryTrackingArray. */ if (materializedSubqueries != null) { // Do the merging into the passed in array. if (subqueryTrackingArray != null) { if (SanityManager.DEBUG) { if (this.materializedSubqueries.length != subqueryTrackingArray.length) { SanityManager.THROWASSERT( "this.ms.length (" + this.materializedSubqueries.length + ") expected to = sta.length(" + subqueryTrackingArray.length + ")"); } } for (int index = 0; index < subqueryTrackingArray.length; index++) { if (this.subqueryTrackingArray[index] != null) { subqueryTrackingArray[index] = this.materializedSubqueries[index]; } } } else { subqueryTrackingArray = this.materializedSubqueries; } materializedSubqueries = null; } stuffTopResultSet( topResultSet, subqueryTrackingArray ); } /** * Private minion of setTopResultSet() and clearInUse() * * @param topResultSet make this the top result set * @param subqueryTrackingArray where to keep track of subqueries in this statement */ private void stuffTopResultSet(ResultSet topResultSet, NoPutResultSet[] subqueryTrackingArray) { this.topResultSet = topResultSet; this.subqueryTrackingArray = subqueryTrackingArray; dependencies = null; } /** * Set the appropriate entry in the subquery tracking array for * the specified subquery. * Useful for closing down open subqueries on an exception. * * @param subqueryNumber The subquery # for this subquery * @param subqueryResultSet The ResultSet at the top of the subquery * @param numSubqueries The total # of subqueries in the entire query * * @exception StandardException thrown on error. */ public void setSubqueryResultSet(int subqueryNumber, NoPutResultSet subqueryResultSet, int numSubqueries) throws StandardException { pleaseBeOnStack(); /* NOTE: In degenerate cases, it is possible that there is no top * result set. For example: * call (select 1 from systables).valueOf('111'); * In that case, we allocate our own subquery tracking array on * each call. (Gross!) * (Trust me, this is only done in degenerate cases. The tests passed, * except for the degenerate cases, before making this change, so we * know that the top result set and array reuse is working for * the non-degenerate cases.) */ if (subqueryTrackingArray == null) { if (topResultSet == null) { subqueryTrackingArray = new NoPutResultSet[numSubqueries]; materializedSubqueries = new NoPutResultSet[numSubqueries]; } else { subqueryTrackingArray = topResultSet.getSubqueryTrackingArray(numSubqueries); } } subqueryTrackingArray[subqueryNumber] = subqueryResultSet; if (materializedSubqueries != null) { materializedSubqueries[subqueryNumber] = subqueryResultSet; } } /** * Get the subquery tracking array for this query. * (Useful for runtime statistics.) * * @return NoPutResultSet[] The (sparse) array of tops of subquery ResultSet trees * @exception StandardException thrown on error. */ public NoPutResultSet[] getSubqueryTrackingArray() throws StandardException { pleaseBeOnStack(); return subqueryTrackingArray; } /** * Track a Dependency within this StatementContext. * (We need to clear any dependencies added within this * context on an error. * * @param dy The dependency to track. * * @exception StandardException thrown on error. */ public void addDependency(Dependency dy) throws StandardException { pleaseBeOnStack(); if (dependencies == null) { dependencies = new ArrayList(); } dependencies.add(dy); } /** * Returns whether we started from within the context of a trigger * or not. * * @return true if we are in a trigger context */ public boolean inTrigger() { return parentInTrigger; } // // Context interface // /** * Close down the top ResultSet, if relevant, and rollback to the * internal savepoint, if one was set. * * @exception StandardException thrown on error. REVISIT: don't want * cleanupOnError's to throw exceptions. */ public void cleanupOnError(Throwable error) throws StandardException { if (SanityManager.DEBUG) { if (SanityManager.DEBUG_ON("traceSavepoints")) { SanityManager.DEBUG_PRINT( "GenericStatementContext.cleanupOnError()", String.valueOf( hashCode() ) ); } } /* ** If it isn't a StandardException, then assume ** session severity. It is probably an unexpected ** java error somewhere in the language. ** Store layer treats JVM error as session severity, ** hence to be consistent and to avoid getting rawstore ** protocol violation errors, we treat java errors here ** to be of session severity. */ int severity = (error instanceof StandardException) ? ((StandardException) error).getSeverity() : ExceptionSeverity.SESSION_SEVERITY; /** * Don't clean up this statement context if it's not in use. * This can happen if you get an error while calling one of * the JDBC getxxxx() methods on a ResultSet, since no statement * context is pushed when those calls occur. */ if (! inUse) { return; } /* Clean up the ResultSet, if one exists */ if (topResultSet != null) { topResultSet.cleanUp(); } /* Close down any open subqueries */ if (subqueryTrackingArray != null) { for (int index = 0; index < subqueryTrackingArray.length; index++) { /* Remember, the array is sparse, so only check * non-null entries. */ if (subqueryTrackingArray[index] != null) { subqueryTrackingArray[index].cleanUp(); } } } /* Clean up any dependencies */ if (dependencies != null) { DependencyManager dmgr = lcc.getDataDictionary().getDependencyManager(); for (Iterator iterator = dependencies.iterator(); iterator.hasNext(); ) { Dependency dy = (Dependency) iterator.next(); dmgr.clearInMemoryDependency(dy); } dependencies = null; } if (severity <= ExceptionSeverity.STATEMENT_SEVERITY && setSavePoint) { if (SanityManager.DEBUG) { if (SanityManager.DEBUG_ON("traceSavepoints")) { SanityManager.DEBUG_PRINT( "GenericStatementContext.cleanupOnError", "rolling back to: " + internalSavePointName); } } lcc.internalRollbackToSavepoint( internalSavePointName, false, null); clearSavePoint(); } if (severity >= ExceptionSeverity.TRANSACTION_SEVERITY ) { // transaction severity errors roll back the transaction. /* ** We call clearSavePoint() above only for statement errors. ** We don't call clearSavePoint() for transaction errors because ** the savepoint will be rolled back anyway. So in this case, ** we need to indicate that the savepoint is not set. */ setSavePoint = false; } /* Pop the context */ lcc.popStatementContext(this, error); } /** * @see Context#isLastHandler */ public boolean isLastHandler(int severity) { // For JVM errors, severity gets mapped to // ExceptionSeverity.NO_APPLICABLE_SEVERITY // in ContextManager.cleanupOnError. It is necessary to // let outer contexts take corrective action for jvm errors, so // return false as this will not be the last handler for such // errors. return inUse && !rollbackParentContext && ( severity == ExceptionSeverity.STATEMENT_SEVERITY ); } /** * Reports whether this StatementContext is on the context stack. * * @return true if this StatementContext is on the context stack. false otherwise. */ public boolean onStack() { return inUse; } /** * Indicates whether the statement needs to be executed atomically * or not, i.e., whether a commit/rollback is permitted by a * connection nested in this statement. * * @return true if needs to be atomic */ public boolean isAtomic() { return isAtomic; } /** * Return the text of the current statement. * Note that this may be null. It is currently * not set up correctly for ResultSets that aren't * single row result sets (e.g SELECT), replication, * and setXXXX/getXXXX jdbc methods. * * @return the statement text */ public String getStatementText() { return stmtText; } // // class implementation // /** * Raise an exception if this Context is not in use, that is, on the * Context Stack. * * @exception StandardException thrown on error. */ private void pleaseBeOnStack() throws StandardException { if ( !inUse ) { throw StandardException.newException(SQLState.LANG_DEAD_STATEMENT); } } public boolean inUse() { return inUse; } public boolean isForReadOnly() { return isForReadOnly; } /** * Tests whether the statement which has allocated this StatementContext * object has been cancelled. This method is typically called from the * thread which is executing the statement, to test whether execution * should continue or stop. * * @return whether the statement which has allocated this StatementContext * object has been cancelled. */ public boolean isCancelled() { return cancellationFlag; } /** * Cancels the statement which has allocated this StatementContext object. * This is done by setting a flag in the StatementContext object. For * this to have any effect, it is the responsibility of the executing * statement to check this flag regularly. */ public void cancel() { cancellationFlag = true; } public void setSQLAllowed(short allow, boolean force) { // cannot override a stricter setting. // -1 is no routine restriction in place // 0 is least restrictive // 4 is most if (force || (allow > sqlAllowed)) sqlAllowed = allow; } public short getSQLAllowed() { if (!inUse) return org.apache.derby.catalog.types.RoutineAliasInfo.NO_SQL; return sqlAllowed; } /** * Indicate that, in the event of a statement-level exception, * this context is NOT the last one that needs to be rolled * back--rather, it is nested within some other statement * context, and that other context needs to be rolled back, * too. */ public void setParentRollback() { rollbackParentContext = true; } /** Set to indicate statement is system code. For example a system procedure, view, function etc. */ public void setSystemCode() { isSystemCode = true; } /** Return true if this statement is system code. */ public boolean getSystemCode() { return isSystemCode; } public StringBuffer appendErrorInfo() { StringBuffer sb = ((ContextImpl) lcc).appendErrorInfo(); if (sb != null) { sb.append("Failed Statement is: "); sb.append(getStatementText()); if ((pvs != null) && pvs.getParameterCount() > 0) { String pvsString = " with " + pvs.getParameterCount() + " parameters " + pvs.toString(); sb.append(pvsString); } } return sb; } /** * @see StatementContext#setActivation(Activation a) */ public void setActivation(Activation a) { activation = a; } /** * @see StatementContext#getActivation */ public Activation getActivation() { return activation; } /** * @see StatementContext#getSQLSessionContext */ public SQLSessionContext getSQLSessionContext() { return sqlSessionContext; } /** * @see StatementContext#setSQLSessionContext(SQLSessionContext ctx) */ public void setSQLSessionContext(SQLSessionContext ctx) { sqlSessionContext = ctx; } }

The table below shows all metrics for GenericStatementContext.java.

MetricValueDescription
BLOCKS77.00Number of blocks
BLOCK_COMMENT64.00Number of block comment lines
COMMENTS289.00Comment lines
COMMENT_DENSITY 1.09Comment density
COMPARISONS34.00Number of comparison operators
CYCLOMATIC81.00Cyclomatic complexity
DECL_COMMENTS40.00Comments in declarations
DOC_COMMENT196.00Number of javadoc comment lines
ELOC264.00Effective lines of code
EXEC_COMMENTS18.00Comments in executable code
EXITS39.00Procedure exits
FUNCTIONS35.00Number of function declarations
HALSTEAD_DIFFICULTY78.98Halstead difficulty
HALSTEAD_EFFORT 0.00Halstead effort
INTERFACE_COMPLEXITY73.00Interface complexity
JAVA0001 0.00JAVA0001 Package name does not contain only lower case letters
JAVA0002 0.00JAVA0002 Package name does not begin with a top level domain name or country code
JAVA0003 0.00JAVA0003 Minimize use of on-demand (.*) imports
JAVA0004 0.00JAVA0004 Unnecessary import from java.lang
JAVA0005 1.00JAVA0005 Imports not in specified order
JAVA0006 0.00JAVA0006 Empty finally block
JAVA0007 0.00JAVA0007 Should not declare public field
JAVA0008 0.00JAVA0008 Empty catch block
JAVA0009 0.00JAVA0009 Protected member in final class
JAVA0010 0.00JAVA0010 Non-instantiable class does not contain a non-private static member
JAVA0011 0.00JAVA0011 Abstract class does not contain an abstract method
JAVA0012 0.00JAVA0012 Non-constructor method with same name as declaring class
JAVA0013 0.00JAVA0013 Non-blank final field is not static
JAVA0014 0.00JAVA0014 Class with only static members has non-private constructor
JAVA0015 0.00JAVA0015 Package class contains public nested type
JAVA0016 0.00JAVA0016 Abstract class contains public constructor
JAVA0017 0.00JAVA0017 Class name does not have required form
JAVA0018 0.00JAVA0018 Method name does not have required form
JAVA0019 0.00JAVA0019 Interface name does not have required form
JAVA0020 0.00JAVA0020 Field name does not have required form
JAVA0021 0.00JAVA0021 Interface method name does not have required form
JAVA0022 0.00JAVA0022 Static final field name does not have required form
JAVA0023 0.00JAVA0023 Empty finalize method
JAVA0024 0.00JAVA0024 Empty class
JAVA0025 0.00JAVA0025 Method override is empty
JAVA0026 0.00JAVA0026 Finalize method with parameters
JAVA0029 0.00JAVA0029 Private method not used
JAVA0030 0.00JAVA0030 Private field not used
JAVA0031 0.00JAVA0031 Case statement not properly closed
JAVA0032 0.00JAVA0032 Switch statement missing default
JAVA0033 0.00JAVA0033 default: not last case in switch statement
JAVA0034 2.00JAVA0034 Missing braces in if statement
JAVA0035 0.00JAVA0035 Missing braces in for statement
JAVA0036 0.00JAVA0036 Missing braces in while statement
JAVA0038 0.00JAVA0038 Non-case label in switch statement
JAVA0039 0.00JAVA0039 Break statement with label
JAVA0040 0.00JAVA0040 Switch statement contains N cases (maximum: M)
JAVA0041 0.00JAVA0041 Nested synchronized block
JAVA0042 0.00JAVA0042 Empty synchronized statement
JAVA0043 0.00JAVA0043 Inner class does not use outer class
JAVA0044 0.00JAVA0044 Serializable class with no instance variables
JAVA0045 0.00JAVA0045 Serializable class with only transient fields
JAVA0046 0.00JAVA0046 Name of class not derived from Exception ends with 'Exception'
JAVA0047 0.00JAVA0047 Serializable class derives from invalid base class
JAVA0048 0.00JAVA0048 Name of class derived from Exception does not end with 'Exception'
JAVA0049 0.00JAVA0049 Nested block at depth N (maximum: M)
JAVA0050 0.00JAVA0050 Class derives from java.lang.Error
JAVA0051 0.00JAVA0051 Class derives from java.lang.RuntimeException
JAVA0052 0.00JAVA0052 Class derives from java.lang.Throwable
JAVA0053 0.00JAVA0053 Unused label
JAVA0054 0.00JAVA0054 Inheritance depth N exceeds maximum M
JAVA0055 0.00JAVA0055 Class should be interface
JAVA0056 0.00JAVA0056 Unnecessary abstract modifier for interface or annotation
JAVA0057 0.00JAVA0057 Unnecessary default constructor
JAVA0058 0.00JAVA0058 Constructor calls super()
JAVA0059 0.00JAVA0059 Method override only calls super()
JAVA0061 0.00JAVA0061 Inaccessible member in anonymous class
JAVA0062 0.00JAVA0062 Public class missing public member or protected constructor
JAVA0063 0.00JAVA0063 Identifier name should not contain '$'
JAVA0064 0.00JAVA0064 N variations of identifier name (maximum: M)
JAVA0065 0.00JAVA0065 Unnecessary final modifier for method in final class
JAVA0066 0.00JAVA0066 Unnecessary modifier for interface nested type
JAVA0067 0.00JAVA0067 Array descriptor on identifier name
JAVA0068 0.00JAVA0068 Modifiers not declared in recommended order
JAVA0071 0.00JAVA0071 Strings compared with ==
JAVA0073 0.00JAVA0073 Integer division in floating-point context
JAVA0074 0.00JAVA0074 Use of Object.notify()
JAVA0075 2.00JAVA0075 Method parameter hides field
JAVA0076 0.00JAVA0076 Use of magic number
JAVA0077 0.00JAVA0077 Private field not used in declaring class
JAVA0078 0.00JAVA0078 Floating point values compared with ==
JAVA0079 0.00JAVA0079 Use of instance to reference static member
JAVA0080 2.00JAVA0080 Import declaration not used
JAVA0081 0.00JAVA0081 Boolean literal in comparison
JAVA0082 0.00JAVA0082 Unnecessary widening cast
JAVA0083 0.00JAVA0083 Unnecessary instanceof test
JAVA0084 0.00JAVA0084 Should use compound assignment operator
JAVA0085 0.00JAVA0085 Use of sun.* class
JAVA0087 0.00JAVA0087 Use of Thread.sleep()
JAVA0089 0.00JAVA0089 Use of restricted package
JAVA0092 0.00JAVA0092 Use of restricted type
JAVA0093 0.00JAVA0093 Redundant assignment
JAVA0094 0.00JAVA0094 Field hides a superclass field
JAVA0095 0.00JAVA0095 Uninitialized private field
JAVA0096 0.00JAVA0096 Field in nested class hides outer field
JAVA0098 0.00JAVA0098 Minimize use of implicit field initializers
JAVA0100 1.00JAVA0100 Class contains N non-final fields (maximum: M)
JAVA0101 0.00JAVA0101 Unnecessary modifier for field in interface
JAVA0102 0.00JAVA0102 Last statement in finalize() not super.finalize()
JAVA0103 0.00JAVA0103 Explicit call to finalize()
JAVA0104 0.00JAVA0104 finalize() only calls super.finalize()
JAVA0105 0.00JAVA0105 Duplicate import declaration
JAVA0106 0.00JAVA0106 Unnecessary import from current package
JAVA0108 1.00JAVA0108 Incorrect javadoc: no @param tag for 'parameter'
JAVA0109 0.00JAVA0109 Incorrect javadoc: no parameter 'parameter'
JAVA0110 4.00JAVA0110 Incorrect javadoc: no @return tag
JAVA0111 0.00JAVA0111 Incorrect javadoc: @return tag for void method
JAVA0112 0.00JAVA0112 Incorrect javadoc: no exception 'exception' in throws
JAVA0113 1.00JAVA0113 Incorrect javadoc: no @author tag
JAVA0114 1.00JAVA0114 Incorrect javadoc: no @version tag
JAVA0115 0.00JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception'
JAVA0116 0.00JAVA0116 Missing javadoc: field 'field'
JAVA0117 0.00JAVA0117 Missing javadoc: method 'method'
JAVA0118 0.00JAVA0118 Missing javadoc: type 'type'
JAVA0119 0.00JAVA0119 Control variable changed within body of for loop
JAVA0123 0.00JAVA0123 Use all three components of for loop
JAVA0125 0.00JAVA0125 Continue statement with label
JAVA0126 0.00JAVA0126 Method declares unchecked exception in throws
JAVA0128 1.00JAVA0128 Public constructor in non-public class
JAVA0130 0.00JAVA0130 Non-static method does not use instance fields
JAVA0131 0.00JAVA0131 Compatible method does not override base
JAVA0132 0.00JAVA0132 Method overload with compatible signature
JAVA0133 0.00JAVA0133 Non-synchronized method overrides synchronized method
JAVA0135 0.00JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method'
JAVA0136 1.00JAVA0136 N methods defined in class (maximum: M)
JAVA0137 0.00JAVA0137 Non-abstract class missing constructor
JAVA0138 1.00JAVA0138 N parameters defined for method (maximum: M)
JAVA0139 0.00JAVA0139 Definition of main other than public static void main(java.lang.String[])
JAVA0141 0.00JAVA0141 Unnecessary modifier for method in interface
JAVA0143 0.00JAVA0143 Synchronized method
JAVA0144 0.00JAVA0144 Line exceeds maximum M characters
JAVA01451118.00JAVA0145 Tab character used in source file
JAVA0150 0.00JAVA0150 java.lang.Error (or subclass) thrown
JAVA0153 0.00JAVA0153 Inefficient conversion of integer to string
JAVA0159 0.00JAVA0159 Inefficient conversion of string to integer
JAVA0160 0.00JAVA0160 Method does not throw specified exception
JAVA0161 0.00JAVA0161 Conditional wait() not in loop
JAVA0163 0.00JAVA0163 Empty statement
JAVA0165 0.00JAVA0165 Conflicting return statement in finally block
JAVA0166 0.00JAVA0166 Generic exception caught
JAVA0167 0.00JAVA0167 ThreadDeath not rethrown
JAVA0169 0.00JAVA0169 Unnecessary catch block: exception 'exception'
JAVA0170 0.00JAVA0170 Caught exception not derived from java.lang.Exception
JAVA0171 0.00JAVA0171 Unused local variable
JAVA0173 0.00JAVA0173 Unused method parameter
JAVA0174 0.00JAVA0174 Assigned local variable never used
JAVA0175 0.00JAVA0175 Successive assignment to variable
JAVA0176 0.00JAVA0176 Local variable name does not have required form
JAVA0177 0.00JAVA0177 Variable declaration missing initializer
JAVA0179 0.00JAVA0179 Local variable hides visible field
JAVA0233 0.00JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID'
JAVA0234 0.00JAVA0234 Class is Serializable but does not define serialVersionUID
JAVA0235 0.00JAVA0235 Class defines serialVersionUID but does not implement Serializable
JAVA0236 0.00JAVA0236 Attempt to clone an object which does not implement Cloneable
JAVA0237 0.00JAVA0237 Class implements Cloneable but does not have public clone method
JAVA0238 0.00JAVA0238 Clone method does not call super.clone()
JAVA0239 0.00JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable
JAVA0240 0.00JAVA0240 Serializable class which declares readObject or writeObject but not both
JAVA0241 0.00JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class
JAVA0242 0.00JAVA0242 Transient field in non-Serializable class
JAVA0243 0.00JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected
JAVA0244 0.00JAVA0244 Field or method name in subclass differs only by case from inherited field or method
JAVA0245 0.00JAVA0245 JUnit TestCase with non-trivial constructor
JAVA0246 0.00JAVA0246 JUnit assertXXX statement missing message parameter
JAVA0247 0.00JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method
JAVA0248 0.00JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature
JAVA0249 0.00JAVA0249 JUnit TestCase 'suite()' should be declared static
JAVA0250 0.00JAVA0250 JUnit TestCase declares testXXX method with incorrect signature
JAVA0251 0.00JAVA0251 Use '%n' for line breaks in printf/format for platform independence
JAVA0252 0.00JAVA0252 'enum' is a Java 1.5 reserved word
JAVA0253 0.00JAVA0253 Not all enum constants consumed in switch statement
JAVA0254 1.00JAVA0254 Use enhanced for loop construct instead of Iterator
JAVA0255 0.00JAVA0255 Result of method invocation not used
JAVA0256 1.00JAVA0256 Assignment of external collection/array to field
JAVA0257 0.00JAVA0257 Use of 'Constant Interface' anti-pattern
JAVA0258 0.00JAVA0258 Implement Iterable for foreach compatibility
JAVA0259 1.00JAVA0259 Return of collection/array field
JAVA0260 0.00JAVA0260 Use 'enum' instead of Enumerated Type pattern
JAVA0261 0.00JAVA0261 Use specialized Enum collection types
JAVA0262 0.00JAVA0262 Use of char in integer context
JAVA0263 0.00JAVA0263 Long literal ends with 'l' instead of 'L'
JAVA0264 0.00JAVA0264 Integer math in long context - check for overflow
JAVA0265 0.00JAVA0265 Use of Throwable.printStackTrace()
JAVA0266 0.00JAVA0266 Use of System.out
JAVA0267 0.00JAVA0267 Use of System.err
JAVA0269 0.00JAVA0269 Contents of StringBuffer never used
JAVA0270 1.00JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array
JAVA0271 0.00JAVA0271 Minimize use of on-demand (.*) static imports
JAVA0272 0.00JAVA0272 Thread.run() called
JAVA0273 0.00JAVA0273 Non-final derivative of Thread calls start() in constructor
JAVA0274 0.00JAVA0274 Serializable class has a synchronized readObject()
JAVA0275 0.00JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods
JAVA0276 0.00JAVA0276 Unnecessary use of String constructor
JAVA0277 0.00JAVA0277 Iterator.next() implementation does not throw NoSuchElementException
JAVA0278 0.00JAVA0278 Unnecessary use of Boolean constructor
JAVA0279 0.00JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method
JAVA0280 0.00JAVA0280 IllegalMonitorStateException caught
JAVA0281 0.00JAVA0281 Iterator.next() not called in loop
JAVA0282 0.00JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext()
JAVA0283 0.00JAVA0283 Control variable not updated in loop body
JAVA0284 0.00JAVA0284 Explicit garbage collection
JAVA0285 1.00JAVA0285 Dereference of potentially null variable
JAVA0286 0.00JAVA0286 Dereference of null variable
JAVA0287 0.00JAVA0287 Unnecessary null check
JAVA0288 1.00JAVA0288 Inconsistent null check
LINES787.00Number of lines in the source file
LINE_COMMENT29.00Number of line comments
LOC399.00Lines of code
LOGICAL_LINES155.00Number of statements
LOOPS 3.00Number of loops
NEST_DEPTH 5.00Maximum nesting depth
OPERANDS608.00Number of operands
OPERATORS1273.00Number of operators
PARAMS22.00Number of formal parameter declarations
PROGRAM_LENGTH1881.00Halstead program length
PROGRAM_VOCAB257.00Halstead program vocabulary
PROGRAM_VOLUME 0.00Halstead program volume
RETURNS51.00Number of return points from functions
SIZE21853.00Size of the file in bytes
UNIQUE_OPERANDS204.00Number of unique operands
UNIQUE_OPERATORS53.00Number of unique operators
WHITESPACE99.00Number of whitespace lines