RowResultSetNode.java
| Index Score | ||
|---|---|---|
 |
 |
org.apache.derby.impl.sql.compile |
 |
 |
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 | |
|---|---|---|
| EXEC_COMMENTS | Comments in executable code |  |
| COMMENTS | Comment lines | |
| DOC_COMMENT | Number of javadoc comment lines | |
| DECL_COMMENTS | Comments in declarations | |
| SIZE | Size of the file in bytes | |
| LINES | Number of lines in the source file | |
| RETURNS | Number of return points from functions | |
| BLOCK_COMMENT | Number of block comment lines | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| JAVA0080 | JAVA0080 Import declaration not used | |
| JAVA0075 | JAVA0075 Method parameter hides field | |
| EXITS | Procedure exits | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| LOC | Lines of code | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0106 | JAVA0106 Unnecessary import from current package | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| ELOC | Effective lines of code | |
| JAVA0179 | JAVA0179 Local variable hides visible field | |
| JAVA0171 | JAVA0171 Unused local variable | |
| FUNCTIONS | Number of function declarations | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| LOOPS | Number of loops | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| LINE_COMMENT | Number of line comments | |
| UNIQUE_OPERATORS | Number of unique operators | |
| OPERANDS | Number of operands | |
| COMPARISONS | Number of comparison operators | |
/*
Derby - Class org.apache.derby.impl.sql.compile.RowResultSetNode
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.compile;
import org.apache.derby.iapi.services.context.ContextManager;
import org.apache.derby.iapi.sql.compile.CompilerContext;
import org.apache.derby.iapi.sql.compile.CostEstimate;
import org.apache.derby.iapi.sql.compile.Optimizer;
import org.apache.derby.iapi.sql.compile.OptimizableList;
import org.apache.derby.iapi.sql.compile.Optimizable;
import org.apache.derby.iapi.sql.compile.OptimizablePredicate;
import org.apache.derby.iapi.sql.compile.OptimizablePredicateList;
import org.apache.derby.iapi.sql.compile.RequiredRowOrdering;
import org.apache.derby.iapi.sql.compile.RowOrdering;
import org.apache.derby.iapi.sql.compile.C_NodeTypes;
import org.apache.derby.iapi.sql.dictionary.DataDictionary;
import org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor;
import org.apache.derby.iapi.sql.dictionary.TableDescriptor;
import org.apache.derby.iapi.sql.Activation;
import org.apache.derby.iapi.sql.ResultSet;
import org.apache.derby.iapi.sql.Row;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.impl.sql.compile.ActivationClassBuilder;
import org.apache.derby.iapi.services.compiler.MethodBuilder;
import org.apache.derby.iapi.store.access.Qualifier;
import org.apache.derby.iapi.services.sanity.SanityManager;
import org.apache.derby.iapi.util.JBitSet;
import org.apache.derby.iapi.reference.SQLState;
import org.apache.derby.iapi.reference.ClassName;
import org.apache.derby.iapi.services.classfile.VMOpcode;
import java.util.Enumeration;
import java.util.Properties;
import java.util.Vector;
/**
* A RowResultSetNode represents the result set for a VALUES clause.
*
*/
public class RowResultSetNode extends FromTable
{
SubqueryList subquerys;
Vector aggregateVector;
OrderByList orderByList;
/**
* Initializer for a RowResultSetNode.
*
* @param valuesClause The result column list for the VALUES clause.
* @param tableProperties Properties list associated with the table
*/
public void init(Object valuesClause, Object tableProperties)
{
super.init(null, tableProperties);
resultColumns = (ResultColumnList) valuesClause;
if (resultColumns != null)
resultColumns.markInitialSize();
}
/**
* Convert this object to a String. See comments in QueryTreeNode.java
* for how this should be done for tree printing.
*
* @return This object as a String
*/
public String toString()
{
if (SanityManager.DEBUG)
{
return "orderByList: " +
(orderByList != null ? orderByList.toString() : "null") + "\n" +
super.toString();
}
else
{
return "";
}
}
public String statementToString()
{
return "VALUES";
}
/**
* Prints the sub-nodes of this object. See QueryTreeNode.java for
* how tree printing is supposed to work.
*
* @param depth The depth of this node in the tree
*/
public void printSubNodes(int depth)
{
if (SanityManager.DEBUG)
{
super.printSubNodes(depth);
if (subquerys != null)
{
printLabel(depth, "subquerys: ");
subquerys.treePrint(depth + 1);
}
}
}
/*
* Optimizable interface
*/
/**
* @see Optimizable#estimateCost
*
* @exception StandardException Thrown on error
*/
public CostEstimate estimateCost(OptimizablePredicateList predList,
ConglomerateDescriptor cd,
CostEstimate outerCost,
Optimizer optimizer,
RowOrdering rowOrdering)
throws StandardException
{
/*
** Assume for now that the cost of a VALUES clause is zero, with one row
** fetched. Is this true, and if not, does it make a difference?
** There's nothing to optimize in this case.
*/
if (costEstimate == null)
{
costEstimate = optimizer.newCostEstimate();
}
costEstimate.setCost(0.0d, 1.0d, 1.0d);
/* A single row is always ordered */
rowOrdering.optimizableAlwaysOrdered(this);
return costEstimate;
}
/**
* Bind the non VTI tables in this ResultSetNode. This includes getting their
* descriptors from the data dictionary and numbering them.
*
* @param dataDictionary The DataDictionary to use for binding
* @param fromListParam FromList to use/append to.
*
* @return ResultSetNode
*
* @exception StandardException Thrown on error
*/
public ResultSetNode bindNonVTITables(DataDictionary dataDictionary,
FromList fromListParam)
throws StandardException
{
/* Assign the tableNumber */
if (tableNumber == -1) // allow re-bind, in which case use old number
tableNumber = getCompilerContext().getNextTableNumber();
/* VALUES clause has no tables, so nothing to do */
return this;
}
/**
* Bind the expressions in this RowResultSetNode. This means binding the
* sub-expressions, as well as figuring out what the return type is
* for each expression.
*
* @exception StandardException Thrown on error
*/
public void bindExpressions(FromList fromListParam)
throws StandardException
{
int nestingLevel;
subquerys = (SubqueryList) getNodeFactory().getNode(
C_NodeTypes.SUBQUERY_LIST,
getContextManager());
aggregateVector = new Vector();
/* Verify that there are no DEFAULTs in the RCL.
* DEFAULT is only valid for an insert, and it has
* already been coverted into the tree by the time we get here.
* The grammar allows:
* VALUES DEFAULT;
* so we need to check for that here and throw an exception if found.
*/
resultColumns.checkForInvalidDefaults();
/* Believe it or not, a values clause can contain correlated column references
* and subqueries. In order to get correlated column resolution working
* correctly, we need to set our nesting level to be 1 deeper than the current
* level and push ourselves into the FROM list.
*/
/* Set the nesting level in this node */
if (fromListParam.size() == 0)
{
nestingLevel = 0;
}
else
{
nestingLevel = ((FromTable) fromListParam.elementAt(0)).getLevel() + 1;
}
setLevel(nestingLevel);
fromListParam.insertElementAt(this, 0);
resultColumns.bindExpressions(fromListParam, subquerys,
aggregateVector);
// Pop ourselves back out of the FROM list
fromListParam.removeElementAt(0);
if (aggregateVector.size() > 0)
{
throw StandardException.newException(SQLState.LANG_NO_AGGREGATES_IN_WHERE_CLAUSE);
}
}
/**
* Bind the expressions in this ResultSetNode if it has tables. This means binding the
* sub-expressions, as well as figuring out what the return type is for
* each expression.
*
* @param fromListParam FromList to use/append to.
*
* @exception StandardException Thrown on error
*/
public void bindExpressionsWithTables(FromList fromListParam)
throws StandardException
{
/* We don't have any tables, so just return */
return;
}
/**
* Bind the expressions in the target list. This means binding the
* sub-expressions, as well as figuring out what the return type is
* for each expression. This is useful for EXISTS subqueries, where we
* need to validate the target list before blowing it away and replacing
* it with a SELECT true.
*
* @exception StandardException Thrown on error
*/
public void bindTargetExpressions(FromList fromListParam)
throws StandardException
{
bindExpressions(fromListParam);
}
/**
* Bind any untyped null nodes to the types in the given ResultColumnList.
*
* @param bindingRCL The ResultColumnList with the types to bind to.
*
* @exception StandardException Thrown on error
*/
public void bindUntypedNullsToResultColumns(ResultColumnList bindingRCL)
throws StandardException
{
/*
** If bindingRCL is null, then we are
** under a cursor node that is inferring
** its RCL from us. It passes null to
** get union to use both sides of the union
** for the check. Anyway, since there is
** nothing under us but an RCL, just pass
** in our RCL.
*/
if (bindingRCL == null)
bindingRCL = resultColumns;
resultColumns.bindUntypedNullsToResultColumns(bindingRCL);
}
/**
* Try to find a ResultColumn in the table represented by this FromTable
* that matches the name in the given ColumnReference.
*
* @param columnReference The columnReference whose name we're looking
* for in the given table.
*
* @return A ResultColumn whose expression is the ColumnNode
* that matches the ColumnReference.
* Returns null if there is no match.
*
* @exception StandardException Thrown on error
*/
public ResultColumn getMatchingColumn(
ColumnReference columnReference)
throws StandardException
{
return null;
}
/**
* Get the exposed name for this table, which is the name that can
* be used to refer to it in the rest of the query.
*
* @return The exposed name of this table.
*
* @exception StandardException Thrown on error
*/
public String getExposedName() throws StandardException
{
return null;
}
/**
* Verify that a SELECT * is valid for this type of subquery.
*
* @param outerFromList The FromList from the outer query block(s)
* @param subqueryType The subquery type
*
* @exception StandardException Thrown on error
*/
public void verifySelectStarSubquery(FromList outerFromList, int subqueryType)
throws StandardException
{
return;
}
/**
* Push the order by list down from the cursor node
* into its child result set so that the optimizer
* has all of the information that it needs to
* consider sort avoidance.
*
* @param orderByList The order by list
*/
void pushOrderByList(OrderByList orderByList)
{
this.orderByList = orderByList;
}
/**
* Put a ProjectRestrictNode on top of each FromTable in the FromList.
* ColumnReferences must continue to point to the same ResultColumn, so
* that ResultColumn must percolate up to the new PRN. However,
* that ResultColumn will point to a new expression, a VirtualColumnNode,
* which points to the FromTable and the ResultColumn that is the source for
* the ColumnReference.
* (The new PRN will have the original of the ResultColumnList and
* the ResultColumns from that list. The FromTable will get shallow copies
* of the ResultColumnList and its ResultColumns. ResultColumn.expression
* will remain at the FromTable, with the PRN getting a new
* VirtualColumnNode for each ResultColumn.expression.)
* We then project out the non-referenced columns. If there are no referenced
* columns, then the PRN's ResultColumnList will consist of a single ResultColumn
* whose expression is 1.
*
* @param numTables Number of tables in the DML Statement
* @param gbl The group by list, if any
* @param fromList The from list, if any
*
* @return The generated ProjectRestrictNode atop the original FromTable.
*
* @exception StandardException Thrown on error
*/
public ResultSetNode preprocess(int numTables,
GroupByList gbl,
FromList fromList)
throws StandardException
{
if (subquerys.size() > 0)
{
subquerys.preprocess(
numTables,
(FromList) getNodeFactory().getNode(
C_NodeTypes.FROM_LIST,
getNodeFactory().doJoinOrderOptimization(),
getContextManager()),
(SubqueryList) getNodeFactory().getNode(
C_NodeTypes.SUBQUERY_LIST,
getContextManager()),
(PredicateList) getNodeFactory().getNode(
C_NodeTypes.PREDICATE_LIST,
getContextManager()));
}
/* Allocate a dummy referenced table map */
referencedTableMap = new JBitSet(numTables);
referencedTableMap.set(tableNumber);
return this;
}
/**
* Ensure that the top of the RSN tree has a PredicateList.
*
* @param numTables The number of tables in the query.
* @return ResultSetNode A RSN tree with a node which has a PredicateList on top.
*
* @exception StandardException Thrown on error
*/
public ResultSetNode ensurePredicateList(int numTables)
throws StandardException
{
return genProjectRestrict(numTables);
}
/**
* Add a new predicate to the list. This is useful when doing subquery
* transformations, when we build a new predicate with the left side of
* the subquery operator and the subquery's result column.
*
* @param predicate The predicate to add
*
* @return ResultSetNode The new top of the tree.
*
* @exception StandardException Thrown on error
*/
public ResultSetNode addNewPredicate(Predicate predicate)
throws StandardException
{
PredicateList predList;
ResultColumnList prRCList;
ResultSetNode newPRN;
/* We are the body of a quantified predicate subquery. We
* need to generate (and return) a PRN above us so that there will be
* a place to attach the new predicate.
*/
/* We get a shallow copy of the ResultColumnList and its
* ResultColumns. (Copy maintains ResultColumn.expression for now.)
*/
prRCList = resultColumns;
resultColumns = resultColumns.copyListAndObjects();
/* Replace ResultColumn.expression with new VirtualColumnNodes
* in the ProjectRestrictNode's ResultColumnList. (VirtualColumnNodes include
* pointers to source ResultSetNode, this, and source ResultColumn.)
*/
prRCList.genVirtualColumnNodes(this, resultColumns);
/* Put the new predicate in a list */
predList = (PredicateList) getNodeFactory().getNode(
C_NodeTypes.PREDICATE_LIST,
getContextManager());
predList.addPredicate(predicate);
/* Finally, we create the new ProjectRestrictNode */
return (ResultSetNode) getNodeFactory().getNode(
C_NodeTypes.PROJECT_RESTRICT_NODE,
this,
prRCList,
null, /* Restriction */
predList, /* Restriction as PredicateList */
null, /* Project subquery list */
null, /* Restrict subquery list */
tableProperties,
getContextManager() );
}
/**
* Evaluate whether or not the subquery in a FromSubquery is flattenable.
* Currently, a FSqry is flattenable if all of the following are true:
* o Subquery is a SelectNode or a RowResultSetNode (not a UnionNode)
* o It contains no top level subqueries. (RESOLVE - we can relax this)
* o It does not contain a group by or having clause
* o It does not contain aggregates.
* o There is at least one result set in the from list that is
* not a RowResultSetNode (the reason is to avoid having
* an outer SelectNode with an empty FromList.
*
* @param fromList The outer from list
*
* @return boolean Whether or not the FromSubquery is flattenable.
*/
public boolean flattenableInFromSubquery(FromList fromList)
{
if ((subquerys != null) &&
(subquerys.size() > 0))
{
return false;
}
if ((aggregateVector != null) &&
(aggregateVector.size() > 0))
{
return false;
}
/*
** Don't flatten if select list contains something
** that isn't clonable
*/
if ( ! resultColumns.isCloneable())
{
return false;
}
boolean nonRowResultSetFound = false;
int flSize = fromList.size();
for (int index = 0; index < flSize; index++)
{
FromTable ft = (FromTable) fromList.elementAt(index);
if (ft instanceof FromSubquery)
{
ResultSetNode subq = ((FromSubquery) ft).getSubquery();
if ( ! (subq instanceof RowResultSetNode))
{
nonRowResultSetFound = true;
break;
}
}
else
{
nonRowResultSetFound = true;
break;
}
}
return nonRowResultSetFound;
}
/**
* Optimize this SelectNode. This means choosing the best access path
* for each table, among other things.
*
* @param dataDictionary The DataDictionary to use for optimization
* @param predicateList The predicate list to optimize against
* @param outerRows The number of outer joining rows
*
* @return ResultSetNode The top of the optimized tree
*
* @exception StandardException Thrown on error
*/
public ResultSetNode optimize(DataDictionary dataDictionary,
PredicateList predicateList,
double outerRows)
throws StandardException
{
/*
** Get an optimizer. The only reason we need one is to get a
** CostEstimate object, so we can represent the cost of this node.
** This seems like overkill, but it's just an object allocation...
*/
Optimizer optimizer =
getOptimizer(
(FromList) getNodeFactory().getNode(
C_NodeTypes.FROM_LIST,
getNodeFactory().doJoinOrderOptimization(),
getContextManager()),
predicateList,
dataDictionary,
(RequiredRowOrdering) null);
costEstimate = optimizer.newCostEstimate();
// RESOLVE: THE COST SHOULD TAKE SUBQUERIES INTO ACCOUNT
costEstimate.setCost(0.0d, outerRows, outerRows);
subquerys.optimize(dataDictionary, outerRows);
return this;
}
/**
* @see Optimizable#modifyAccessPath
*
* @exception StandardException Thrown on error
*/
public Optimizable modifyAccessPath(JBitSet outerTables) throws StandardException
{
/* For most types of Optimizable, do nothing */
return (Optimizable) modifyAccessPaths();
}
/**
* @see ResultSetNode#modifyAccessPaths
*
* @exception StandardException Thrown on error
*/
public ResultSetNode modifyAccessPaths() throws StandardException
{
ResultSetNode treeTop = this;
subquerys.modifyAccessPaths();
/* Generate the OrderByNode if a sort is still required for
* the order by.
*/
if (orderByList != null)
{
treeTop = (ResultSetNode) getNodeFactory().getNode(
C_NodeTypes.ORDER_BY_NODE,
treeTop,
orderByList,
tableProperties,
getContextManager());
}
return treeTop;
}
/**
* Return whether or not this ResultSet tree is guaranteed to return
* at most 1 row based on heuristics. (A RowResultSetNode and a
* SELECT with a non-grouped aggregate will return at most 1 row.)
*
* @return Whether or not this ResultSet tree is guaranteed to return
* at most 1 row based on heuristics.
*/
boolean returnsAtMostOneRow()
{
return true;
}
/**
* The generated ResultSet will be:
*
* RowResultSet -- for the VALUES clause
*
*
* @exception StandardException Thrown on error
*/
public void generate(ActivationClassBuilder acb,
MethodBuilder mb)
throws StandardException
{
if (SanityManager.DEBUG)
SanityManager.ASSERT(resultColumns != null, "Tree structure bad");
// Get our final cost estimate.
costEstimate = getFinalCostEstimate();
/*
** Check and see if everything below us is a constant or not.
** If so, we'll let execution know that it can do some caching.
** Before we do the check, we are going to temporarily set
*/
boolean canCache = canWeCacheResults();
/* Get the next ResultSet #, so that we can number this ResultSetNode, its
* ResultColumnList and ResultSet.
*/
assignResultSetNumber();
// we are dealing with
// VALUES(value1, value2, value3)
// so we generate a RowResultSet to return the values listed.
// we can reduce the tree to one RowResultSet
// since there is nothing but the resultColumns
// RowResultSet takes the row-generating function
// so we generate one and get back the expression
// pointing to it.
//
// generate the expression to return, which is:
// ResultSetFactory.getRowResultSet(this, planX.exprN)
// [planX is the name of the class being generated,
// exprN is the name of the function being generated.]
acb.pushGetResultSetFactoryExpression(mb);
acb.pushThisAsActivation(mb);
resultColumns.generate(acb, mb);
mb.push(canCache);
mb.push(resultSetNumber);
mb.push(costEstimate.rowCount());
mb.push(costEstimate.getEstimatedCost());
mb.callMethod(VMOpcode.INVOKEINTERFACE, (String) null, "getRowResultSet",
ClassName.NoPutResultSet, 6);
}
/**
* Replace any DEFAULTs with the associated tree for the default.
*
* @param ttd The TableDescriptor for the target table.
* @param tcl The RCL for the target table.
*
* @exception StandardException Thrown on error
*/
void replaceDefaults(TableDescriptor ttd, ResultColumnList tcl)
throws StandardException
{
resultColumns.replaceDefaults(ttd, tcl);
}
/**
* Optimize any subqueries that haven't been optimized any where
* else. This is useful for a RowResultSetNode as a derived table
* because it doesn't get optimized otherwise.
*
* @exception StandardException Thrown on error
*/
void optimizeSubqueries(DataDictionary dd, double rowCount)
throws StandardException
{
subquerys.optimize(dd, rowCount);
}
/**
* @see ResultSetNode#adjustForSortElimination
*/
void adjustForSortElimination()
{
}
/*
** Check and see if everything below us is a constant or not.
** If so, we'll let execution know that it can do some caching.
** Before we do the check, we are going to temporarily set
** ParameterNodes to CONSTANT. We do this because we know
** that we can cache a row with a parameter value and get
** the param column reset by the user setting a param, so
** we can skip over parameter nodes. We are doing this
** extra work to optimize inserts of the form:
**
** prepare: insert into mytab values (?,?);
** setParam
** execute()
** setParam
** execute()
*/
private boolean canWeCacheResults() throws StandardException
{
/*
** Check the tree below us
*/
HasVariantValueNodeVisitor visitor =
new HasVariantValueNodeVisitor(Qualifier.QUERY_INVARIANT, true);
super.accept(visitor);
boolean canCache = !visitor.hasVariant();
return canCache;
}
}
The table below shows all metrics for RowResultSetNode.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 44.00 | Number of blocks | |
| BLOCK_COMMENT | 108.00 | Number of block comment lines | |
| COMMENTS | 345.00 | Comment lines | |
| COMMENT_DENSITY | 1.43 | Comment density | |
| COMPARISONS | 19.00 | Number of comparison operators | |
| CYCLOMATIC | 48.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 29.00 | Comments in declarations | |
| DOC_COMMENT | 221.00 | Number of javadoc comment lines | |
| ELOC | 241.00 | Effective lines of code | |
| EXEC_COMMENTS | 28.00 | Comments in executable code | |
| EXITS | 55.00 | Procedure exits | |
| FUNCTIONS | 27.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 58.73 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 93.00 | 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 | 1.00 | 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 | 4.00 | 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 | 1.00 | 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 | 3.00 | 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 | 9.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 1.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 1.00 | 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 | 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 | 1.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 1.00 | 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 | 1471.00 | 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 | 1.00 | 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 | 1.00 | 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 | 763.00 | Number of lines in the source file | |
| LINE_COMMENT | 16.00 | Number of line comments | |
| LOC | 331.00 | Lines of code | |
| LOGICAL_LINES | 124.00 | Number of statements | |
| LOOPS | 1.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 631.00 | Number of operands | |
| OPERATORS | 1078.00 | Number of operators | |
| PARAMS | 34.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1709.00 | Halstead program length | |
| PROGRAM_VOCAB | 274.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 59.00 | Number of return points from functions | |
| SIZE | 22448.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 231.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 43.00 | Number of unique operators | |
| WHITESPACE | 87.00 | Number of whitespace lines | |