ScanController.java
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|---|---|---|
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org.apache.derby.iapi.store.access |
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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.
| Metric | Description | |
|---|---|---|
| DOC_COMMENT | Number of javadoc comment lines |  |
| COMMENTS | Comment lines | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| COMMENT_DENSITY | Comment density | |
| DECL_COMMENTS | Comments in declarations | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| CYCLOMATIC | Cyclomatic complexity | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| LINE_COMMENT | Number of line comments | |
| COMPARISONS | Number of comparison operators | |
| ELOC | Effective lines of code | |
| LOGICAL_LINES | Number of statements | |
| LOC | Lines of code | |
| OPERATORS | Number of operators | |
| PROGRAM_LENGTH | Halstead program length | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| BLOCKS | Number of blocks | |
| OPERANDS | Number of operands | |
| RETURNS | Number of return points from functions | |
| LOOPS | Number of loops | |
| WHITESPACE | Number of whitespace lines | |
| EXITS | Procedure exits | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
Derby - Class org.apache.derby.iapi.store.access.ScanController
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.iapi.store.access;
import org.apache.derby.iapi.services.io.Storable;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.types.DataValueDescriptor;
import org.apache.derby.iapi.types.RowLocation;
import org.apache.derby.iapi.services.io.FormatableBitSet;
/**
A scan is the mechanism for iterating over the rows in a conglomerate,
the scan controller is the interface through which access clients
control the underlying scan. An instance of a scan controller can
be thought of as an open scan.
<p>
Scans are opened from a TransactionController.
<P>
A ScanController can handle partial rows. Partial rows
are described in RowUtil.
<BR>
A scan controller is opened with a FormatableBitSet that describes the
columns that need to be returned on a fetch call. This FormatableBitSet
need not include any columns referenced in the qualifers, start
and/or stop keys.
@see TransactionController#openScan
@see GenericScanController
@see RowCountable
@see RowUtil
**/
public interface ScanController extends GenericScanController
{
/**
GE is used to position a scan at values greater than or or equal to the
given key in the scan. This positioning argument refers to the order
within the scan (not necessarily actual compare calls on the datatypes).
"greater" than is interpreted in terms of the
current conglomerate and scan. For instance, a btree may be ordered
ascending on an int, in that case a 2 is "greater" than 1 in a forward
scan on that index, and 1 is "greater" than 2 in a backward scan.
If the btree was ordered descending on an int then 1 is "greater" than
2 in a forward scan on that index, and 2 is "greater" than 1 in a backward
scan.
@see TransactionController#openScan
*/
/* The value of this must be the same value returned by the Orderable
* interface when a key is > than another key.
*/
public static final int GE = 1;
/**
GT is used to position a scan at values greater than the given key.
This positioning argument refers to the order
within the scan (not necessarily actual compare calls on the datatypes).
"greater" than is interpreted in terms of the
current conglomerate and scan. For instance, a btree may be ordered
ascending on an int, in that case a 2 is "greater" than 1 in a forward
scan on that index, and 1 is "greater" than 2 in a backward scan.
If the btree was ordered descending on an int then 1 is "greater" than
2 in a forward scan on that index, and 2 is "greater" than 1 in a backward
scan.
@see TransactionController#openScan
*/
/* The value of this must be the same value returned by the Orderable
* interface when a key is < than another key.
*/
public static final int GT = -1;
/**
NA - argument is unused in call. For some scans the key is set to null
to indicate no start or stop position, in those cases the position
operator is ignored.
@see TransactionController#openScan
*/
/* The value of this must be the same value returned by the Orderable
* interface when a key is < than another key.
*/
public static final int NA = 0;
/**
Delete the row at the current position of the scan.
@return true if the delete was successful,
false if the current position is no longer valid (ie. if it was already
deleted).
@exception StandardException Standard exception policy.
**/
boolean delete()
throws StandardException;
/**
* A call to allow client to indicate that current row does not qualify.
* <p>
* Indicates to the ScanController that the current row does not
* qualify for the scan. If the isolation level of the scan allows,
* this may result in the scan releasing the lock on this row.
* <p>
* Note that some scan implimentations may not support releasing locks on
* non-qualifying rows, or may delay releasing the lock until sometime
* later in the scan (ie. it may be necessary to keep the lock until
* either the scan is repositioned on the next row or page).
* <p>
* This call should only be made while the scan is positioned on a current
* valid row.
*
* @exception StandardException Standard exception policy.
**/
void didNotQualify() throws StandardException;
/**
Returns true if the current position of the scan still qualifies
under the set of qualifiers passed to the openScan(). When called
this routine will reapply all qualifiers against the row currently
positioned and return true if the row still qualifies. If the row
has been deleted or no longer passes the qualifiers then this routine
will return false.
This case can come about if the current scan
or another scan on the same table in the same transaction
deleted the row or changed columns referenced by the qualifier after
the next() call which positioned the scan at this row.
Note that for comglomerates which don't support update, like btree's,
there is no need to recheck the qualifiers.
The results of a fetch() performed on a scan positioned on
a deleted row are undefined, note that this can happen even if next()
has returned true (for instance the client can delete the row, or if
using read uncommitted another thread can delete the row after the
next() call but before the fetch).
@exception StandardException Standard exception policy.
**/
boolean doesCurrentPositionQualify()
throws StandardException;
/**
* Return true is the scan has been closed after a commit, but was
* opened with holdability and can be reopened using
* positionAtRowLocation.
*
* @exception StandardException Standard exception policy.
*
* @see ScanController#positionAtRowLocation
*/
boolean isHeldAfterCommit() throws StandardException;
/**
Fetch the (partial) row at the current position of the Scan.
The value in the destRow storable row is replaced
with the value of the row at the current scan
position. The columns of the destRow row must
be of the same type as the actual columns in the
underlying conglomerate. The number of elements in
fetch must be compatible with the number of scan columns
requested at the openScan call time.
<BR>
A fetch can return a sub-set of the scan columns reqested
at scan open time by supplying a destRow will less elements
than the number of requested columns. In this case the N leftmost
of the requested columns are fetched, where N = destRow.length.
In the case where all columns are rested and N = 2 then columns 0 and 1
are returned. In the case where the openScan FormatableBitSet requested columns
1, 4 and 7, then columns 1 and 4 would be fetched when N = 2.
<BR>
The results of a fetch() performed on a scan after next() has returned
false are undefined.
A fetch() performed on a scan positioned on
a deleted row will throw a StandardException with
state = SQLState.AM_RECORD_NOT_FOUND. Note that this can happen even if
next() has returned true (for instance the client can delete the row, or if
using read uncommitted another thread can delete the row after the
next() call but before the fetch).
@param destRow The row into which the value of the current
position in the scan is to be stored.
@exception StandardException Standard exception policy.
@see RowUtil
**/
void fetch(DataValueDescriptor[] destRow)
throws StandardException;
/**
The same as fetch, except that the qualifiers passed to the openScan()
will not be applied. destRow will contain the current row even if it
has been changed and no longer qualifies.
@param destRow The row into which the value of the current
position in the scan is to be stored.
@exception StandardException Standard exception policy.
*/
void fetchWithoutQualify(DataValueDescriptor[] destRow)
throws StandardException;
/**
Fetch the (partial) row at the next position of the Scan.
If there is a valid next position in the scan then
the value in the destRow storable row is replaced
with the value of the row at the current scan
position. The columns of the destRow row must
be of the same type as the actual columns in the
underlying conglomerate.
The resulting contents of destRow after a fetchNext()
which returns false is undefined.
The result of calling fetchNext(row) is exactly logically
equivalent to making a next() call followed by a fetch(row)
call. This interface allows implementations to optimize
the 2 calls if possible.
@param destRow The destRow row into which the value
of the next position in the scan is to be stored.
@return True if there is a next position in the scan,
false if there isn't.
@exception StandardException Standard exception policy.
@see ScanController#fetch
@see RowUtil
**/
boolean fetchNext(DataValueDescriptor[] destRow)
throws StandardException;
/**
Fetch the location of the current position in the scan.
The destination location is replaced with the location
corresponding to the current position in the scan.
The destination location must be of the correct actual
type to accept a location from the underlying conglomerate
location.
The results of a fetchLocation() performed on a scan after next() has
returned false are undefined.
The results of a fetchLocation() performed on a scan positioned on
a deleted row are undefined, note that this can happen even if next()
has returned true (for instance the client can delete the row, or if
using read uncommitted another thread can delete the row after the
next() call but before the fetchLocation).
@exception StandardException Standard exception policy.
**/
void fetchLocation(RowLocation destRowLocation)
throws StandardException;
/**
Returns true if the current position of the scan is at a
deleted row. This case can come about if the current scan
or another scan on the same table in the same transaction
deleted the row after the next() call which positioned the
scan at this row.
The results of a fetch() performed on a scan positioned on
a deleted row are undefined.
@exception StandardException Standard exception policy.
**/
boolean isCurrentPositionDeleted()
throws StandardException;
/**
Move to the next position in the scan. If this is the first
call to next(), the position is set to the first row.
Returns false if there is not a next row to move to.
It is possible, but not guaranteed, that this method could return
true again, after returning false, if some other operation in the same
transaction appended a row to the underlying conglomerate.
@return True if there is a next position in the scan,
false if there isn't.
@exception StandardException Standard exception policy.
**/
boolean next()
throws StandardException;
/**
* Positions the scan at row location and locks the row.
* If the scan is not opened, it will be reopened if this is a holdable
* scan and there has not been any operations which causes RowLocations
* to be invalidated.
* @param rl RowLocation for the new position for the scan. The
* RowLocation submitted should be a RowLocation which has
* previously been returned by this ScanController.
* @return true if the scan has been positioned at the RowLocation.
* false if the scan could not be positioned.
*
* @exception StandardException Standard exception policy.
*
*/
boolean positionAtRowLocation(RowLocation rl)
throws StandardException;
/**
Replace the (partial) row at the current position of the scan.
@return true if the replace was successful,
false if the current position is no longer valid (ie. if it was deleted).
@exception StandardException Standard exception policy.
@see RowUtil
**/
boolean replace(DataValueDescriptor[] row, FormatableBitSet validColumns)
throws StandardException;
}
The table below shows all metrics for ScanController.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 0.00 | Number of blocks | |
| BLOCK_COMMENT | 29.00 | Number of block comment lines | |
| COMMENTS | 287.00 | Comment lines | |
| COMMENT_DENSITY | 8.97 | Comment density | |
| COMPARISONS | 0.00 | Number of comparison operators | |
| CYCLOMATIC | 12.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 20.00 | Comments in declarations | |
| DOC_COMMENT | 258.00 | Number of javadoc comment lines | |
| ELOC | 32.00 | Effective lines of code | |
| EXEC_COMMENTS | 0.00 | Comments in executable code | |
| EXITS | 0.00 | Procedure exits | |
| FUNCTIONS | 12.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 22.54 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 7.00 | 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 | 1.00 | 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 | 3.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 3.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 3.00 | 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 | 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 | 67.00 | 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 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 348.00 | Number of lines in the source file | |
| LINE_COMMENT | 0.00 | Number of line comments | |
| LOC | 34.00 | Lines of code | |
| LOGICAL_LINES | 21.00 | Number of statements | |
| LOOPS | 0.00 | Number of loops | |
| NEST_DEPTH | 0.00 | Maximum nesting depth | |
| OPERANDS | 84.00 | Number of operands | |
| OPERATORS | 137.00 | Number of operators | |
| PARAMS | 7.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 221.00 | Halstead program length | |
| PROGRAM_VOCAB | 63.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 0.00 | Number of return points from functions | |
| SIZE | 13183.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 41.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 22.00 | Number of unique operators | |
| WHITESPACE | 27.00 | Number of whitespace lines | |