Constraint.java
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|---|---|---|
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org.hsqldb |
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HSQL Database Engine |
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 | |
|---|---|---|
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' |  |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| RETURNS | Number of return points from functions | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| CYCLOMATIC | Cyclomatic complexity | |
| DECL_COMMENTS | Comments in declarations | |
| PARAMS | Number of formal parameter declarations | |
| SIZE | Size of the file in bytes | |
| JAVA0116 | JAVA0116 Missing javadoc: field 'field' | |
| LINES | Number of lines in the source file | |
| COMMENTS | Comment lines | |
| FUNCTIONS | Number of function declarations | |
| COMPARISONS | Number of comparison operators | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| OPERANDS | Number of operands | |
| ELOC | Effective lines of code | |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| LOC | Lines of code | |
| BLOCKS | Number of blocks | |
| BLOCK_COMMENT | Number of block comment lines | |
| PROGRAM_LENGTH | Halstead program length | |
| EXEC_COMMENTS | Comments in executable code | |
| WHITESPACE | Number of whitespace lines | |
| LINE_COMMENT | Number of line comments | |
| OPERATORS | Number of operators | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| JAVA0109 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0031 | JAVA0031 Case statement not properly closed | |
| DOC_COMMENT | Number of javadoc comment lines | |
| LOGICAL_LINES | Number of statements | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| UNIQUE_OPERATORS | Number of unique operators | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0259 | JAVA0259 Return of collection/array field | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0032 | JAVA0032 Switch statement missing default | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| EXITS | Procedure exits | |
| JAVA0064 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| JAVA0100 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/* Copyright (c) 1995-2000, The Hypersonic SQL Group.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the Hypersonic SQL Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE HYPERSONIC SQL GROUP,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Hypersonic SQL Group.
*
*
* For work added by the HSQL Development Group:
*
* Copyright (c) 2001-2007, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb;
import org.hsqldb.HsqlNameManager.HsqlName;
import org.hsqldb.index.Index;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.lib.OrderedHashSet;
import org.hsqldb.navigator.RowIterator;
import org.hsqldb.result.Result;
import org.hsqldb.rights.Grantee;
// fredt@users 20020225 - patch 1.7.0 by boucherb@users - named constraints
// fredt@users 20020320 - doc 1.7.0 - update
// tony_lai@users 20020820 - patch 595156 - violation of Integrity constraint name
/**
* Implementation of a table constraint with references to the indexes used
* by the constraint.<p>
*
* @author Thomas Mueller (Hypersonic SQL Group)
* @version 1.8.0
* @since Hypersonic SQL
*/
public class Constraint implements SchemaObject {
/*
SQL CLI codes
Referential Constraint 0 CASCADE
Referential Constraint 1 RESTRICT
Referential Constraint 2 SET NULL
Referential Constraint 3 NO ACTION
Referential Constraint 4 SET DEFAULT
*/
public static final int CASCADE = 0,
SET_NULL = 2,
NO_ACTION = 3,
SET_DEFAULT = 4,
INIT_DEFERRED = 5,
INIT_IMMEDIATE = 6,
NOT_DEFERRABLE = 7;
public static final int FOREIGN_KEY = 0,
MAIN = 1,
UNIQUE = 2,
CHECK = 3,
PRIMARY_KEY = 4,
TEMP = 5;
ConstraintCore core;
private HsqlName name;
int constType;
boolean isForward;
//
Expression check;
private boolean isNotNull;
int notNullColumnIndex;
RangeVariable rangeVariable;
/**
* Constructor declaration for PK and UNIQUE
*/
public Constraint(HsqlName name, Table t, Index index, int type) {
core = new ConstraintCore();
this.name = name;
constType = type;
core.mainTable = t;
core.mainIndex = index;
core.mainCols = index.getColumns();
}
/**
* Constructor for main constraints (foreign key references in PK table)
*/
public Constraint(HsqlName name, Constraint fkconstraint) {
this.name = name;
constType = MAIN;
core = fkconstraint.core;
}
Constraint duplicate() {
Constraint copy = new Constraint();
copy.core = core.duplicate();
copy.name = name;
copy.constType = constType;
copy.isForward = isForward;
//
copy.check = check;
copy.isNotNull = isNotNull;
copy.notNullColumnIndex = notNullColumnIndex;
copy.rangeVariable = rangeVariable;
return copy;
}
// for temp constraints only
OrderedHashSet mainColSet;
OrderedHashSet refColSet;
/**
* General constructor for constraints.
*
* @param name name of constraint
* @param refCols list of referencing columns
* @param mainTable referenced table
* @param mainCols list of referenced columns
* @param type constraint type
* @param deleteAction triggered action on delete
* @param updateAction triggered action on update
* @throws HsqlException
*/
public Constraint(HsqlName name, OrderedHashSet refCols, Table mainTable,
OrderedHashSet mainCols, int type, int deleteAction,
int updateAction) {
core = new ConstraintCore();
this.name = name;
constType = type;
mainColSet = mainCols;
core.mainTable = mainTable;
refColSet = refCols;
core.deleteAction = deleteAction;
core.updateAction = updateAction;
}
public Constraint(HsqlName name, OrderedHashSet mainCols, int type) {
core = new ConstraintCore();
this.name = name;
constType = type;
mainColSet = mainCols;
}
void setColumnsIndexes(Table table) throws HsqlException {
if (constType == Constraint.FOREIGN_KEY) {
if (mainColSet == null) {
core.mainCols = core.mainTable.getPrimaryKey();
if (core.mainCols == null) {
throw Trace.error(Trace.TABLE_HAS_NO_PRIMARY_KEY);
}
} else if (core.mainCols == null) {
core.mainCols = core.mainTable.getColumnIndexes(mainColSet);
}
if (core.refCols == null) {
core.refCols = table.getColumnIndexes(refColSet);
}
} else if (mainColSet != null) {
core.mainCols = table.getColumnIndexes(mainColSet);
}
}
private Constraint() {}
/**
* Returns the HsqlName.
*/
public HsqlName getName() {
return name;
}
public HsqlName getSchemaName() {
return name.schema;
}
public Grantee getOwner() {
return name.schema.owner;
}
public OrderedHashSet getReferences() {
/*
if (check == null) {
return null;
}
OrderedHashSet set = new OrderedHashSet();
Expression.collectAllExpressions(set, check,
Expression.columnExpressionSet,
Expression.emptyExpressionSet);
OrderedHashSet nameSet = new OrderedHashSet();
for (int i = 0; i < set.size(); i++) {
HsqlName name = ((Expression) set.get(i)).getColumn().getName();
nameSet.add(name);
}
return nameSet;
*/
return null;
}
public void compile(Session session) throws HsqlException {}
public HsqlName getMainName() {
return core.mainName;
}
public HsqlName getRefName() {
return core.refName;
}
/**
* Returns the type of constraint
*/
public int getType() {
return constType;
}
/**
* Returns the main table
*/
public Table getMain() {
return core.mainTable;
}
/**
* Returns the main index
*/
Index getMainIndex() {
return core.mainIndex;
}
/**
* Returns the reference table
*/
public Table getRef() {
return core.refTable;
}
/**
* Returns the reference index
*/
Index getRefIndex() {
return core.refIndex;
}
/**
* The ON DELETE triggered action of (foreign key) constraint
*/
public int getDeleteAction() {
return core.deleteAction;
}
/**
* The ON UPDATE triggered action of (foreign key) constraint
*/
public int getUpdateAction() {
return core.updateAction;
}
public int getDeferability() {
return NOT_DEFERRABLE;
}
/**
* Returns the main table column index array
*/
public int[] getMainColumns() {
return core.mainCols;
}
/**
* Returns the reference table column index array
*/
public int[] getRefColumns() {
return core.refCols;
}
/**
* Returns the DDL for the expression in CHECK clause
*/
public String getCheckDDL() {
return check.getDDL();
}
/**
* Returns true if the expression in CHECK is a simple IS NOT NULL
*/
public boolean isNotNull() {
return isNotNull;
}
/**
* Returns true if an index is part this constraint and the constraint is set for
* a foreign key. Used for tests before dropping an index.
*/
boolean isIndexFK(Index index) {
if (constType == FOREIGN_KEY || constType == MAIN) {
if (core.mainIndex == index || core.refIndex == index) {
return true;
}
}
return false;
}
/**
* Returns true if an index is part this constraint and the constraint is set for
* a unique constraint. Used for tests before dropping an index.
*/
boolean isIndexUnique(Index index) {
return (constType == UNIQUE && core.mainIndex == index);
}
boolean hasColumnOnly(int colIndex) {
switch (constType) {
case CHECK :
return rangeVariable.usedColumns[colIndex] && ArrayUtil
.countTrueElements(rangeVariable.usedColumns) == 1;
case PRIMARY_KEY :
case UNIQUE :
return core.mainCols.length == 1
&& core.mainCols[0] == colIndex;
case MAIN :
return core.mainCols.length == 1
&& core.mainCols[0] == colIndex
&& core.mainTable == core.refTable;
case FOREIGN_KEY :
return core.refCols.length == 1 && core.refCols[0] == colIndex
&& core.mainTable == core.refTable;
default :
throw Trace.runtimeError(Trace.UNSUPPORTED_INTERNAL_OPERATION,
"Constraint");
}
}
boolean hasColumnPlus(int colIndex) {
switch (constType) {
case CHECK :
return rangeVariable.usedColumns[colIndex] && ArrayUtil
.countTrueElements(rangeVariable.usedColumns) > 1;
case PRIMARY_KEY :
case UNIQUE :
return core.mainCols.length != 1
&& ArrayUtil.find(core.mainCols, colIndex) != -1;
case MAIN :
return ArrayUtil.find(core.mainCols, colIndex) != -1
&& (core.mainCols.length != 1
|| core.mainTable != core.refTable);
case FOREIGN_KEY :
return ArrayUtil.find(core.refCols, colIndex) != -1
&& (core.mainCols.length != 1
|| core.mainTable == core.refTable);
default :
throw Trace.runtimeError(Trace.UNSUPPORTED_INTERNAL_OPERATION,
"Constraint");
}
}
boolean hasColumn(int colIndex) {
switch (constType) {
case CHECK :
return rangeVariable.usedColumns[colIndex];
case PRIMARY_KEY :
case UNIQUE :
case MAIN :
return ArrayUtil.find(core.mainCols, colIndex) != -1;
case FOREIGN_KEY :
return ArrayUtil.find(core.refCols, colIndex) != -1;
default :
throw Trace.runtimeError(Trace.UNSUPPORTED_INTERNAL_OPERATION,
"Constraint");
}
}
// fredt@users 20020225 - patch 1.7.0 by fredt - duplicate constraints
/**
* Compares this with another constraint column set. This is used only for
* UNIQUE constraints.
*/
boolean isUniqueWithColumns(int[] cols) {
if (constType != UNIQUE || core.mainCols.length != cols.length) {
return false;
}
return ArrayUtil.haveEqualSets(core.mainCols, cols, cols.length);
}
/**
* Compares this with another constraint column set. This implementation
* only checks FOREIGN KEY constraints.
*/
boolean isEquivalent(Table mainTable, int[] mainCols, Table refTable,
int[] refCols) {
if (constType != Constraint.MAIN
&& constType != Constraint.FOREIGN_KEY) {
return false;
}
if (mainTable != core.mainTable || refTable != core.refTable) {
return false;
}
return ArrayUtil.areEqualSets(core.mainCols, mainCols)
&& ArrayUtil.areEqualSets(core.refCols, refCols);
}
/**
* Used to update constrains to reflect structural changes in a table.
* Prior checks must ensure that this method does not throw.
*
* @param oldt reference to the old version of the table
* @param newt referenct to the new version of the table
* @param colindex index at which table column is added or removed
* @param adjust -1, 0, +1 to indicate if column is added or removed
* @throws HsqlException
*/
void updateTable(Session session, Table oldTable, Table newTable,
int colIndex, int adjust) throws HsqlException {
if (oldTable == core.mainTable) {
core.mainTable = newTable;
if (core.mainIndex != null) {
core.mainIndex =
core.mainTable.getIndex(core.mainIndex.getName().name);
core.mainCols = ArrayUtil.toAdjustedColumnArray(core.mainCols,
colIndex, adjust);
}
}
if (oldTable == core.refTable) {
core.refTable = newTable;
if (core.refIndex != null) {
core.refIndex =
core.refTable.getIndex(core.refIndex.getName().name);
core.refCols = ArrayUtil.toAdjustedColumnArray(core.refCols,
colIndex, adjust);
}
}
// CHECK
if (constType == CHECK) {
recompile(session, newTable);
}
}
/**
* Checks for foreign key or check constraint violation when
* inserting a row into the child table.
*/
void checkInsert(Session session, Table table,
Object[] row) throws HsqlException {
switch (constType) {
case CHECK :
if (!isNotNull) {
checkCheckConstraint(session, table, row);
}
return;
case FOREIGN_KEY :
if (Index.isNull(row, core.refCols)) {
return;
}
// a record must exist in the main table
boolean exists = core.mainIndex.exists(session, row,
core.refCols);
if (!exists) {
// special case: self referencing table and self referencing row
if (core.mainTable == core.refTable) {
boolean match = true;
for (int i = 0; i < core.mainCols.length; i++) {
if (!row[core.refCols[i]].equals(
row[core.mainCols[i]])) {
match = false;
break;
}
}
if (match) {
return;
}
}
throw Trace.error(
Trace.INTEGRITY_CONSTRAINT_VIOLATION_NOPARENT,
Trace.Constraint_violation, new Object[] {
core.refName.name, core.mainTable.getName().name
});
}
}
}
/*
* Tests a row against this CHECK constraint.
*/
void checkCheckConstraint(Session session, Table table,
Object[] data) throws HsqlException {
if (session.compiledStatementExecutor.rangeIterators[0] == null) {
session.compiledStatementExecutor.rangeIterators[0] =
rangeVariable.getIterator(session);
}
session.compiledStatementExecutor.rangeIterators[0].currentData = data;
boolean nomatch = Boolean.FALSE.equals(check.getValue(session));
session.compiledStatementExecutor.rangeIterators[0].currentData = null;
if (nomatch) {
throw Trace.error(Trace.CHECK_CONSTRAINT_VIOLATION,
Trace.Constraint_violation, new Object[] {
name.name, table.tableName.name
});
}
}
void checkCheckConstraint(Session session, Table table,
Object data) throws HsqlException {
session.sessionData.currentValue = data;
boolean nomatch = Boolean.FALSE.equals(check.getValue(session));
if (nomatch) {
session.sessionData.currentValue = null;
throw Trace.error(Trace.CHECK_CONSTRAINT_VIOLATION,
Trace.Constraint_violation, new Object[] {
name.name, table.tableName.name
});
}
session.sessionData.currentValue = null;
}
// fredt@users 20020225 - patch 1.7.0 - cascading deletes
/**
* New method to find any referencing row for a
* foreign key (finds row in child table). If ON DELETE CASCADE is
* supported by this constraint, then the method finds the first row
* among the rows of the table ordered by the index and doesn't throw.
* Without ON DELETE CASCADE, the method attempts to finds any row that
* exists, in which case it throws an exception. If no row is found,
* null is returned.
* (fredt@users)
*
* @param row array of objects for a database row
* @param forDelete should we allow 'ON DELETE CASCADE' or 'ON UPDATE CASCADE'
* @return Node object or null
* @throws HsqlException
*/
RowIterator findFkRef(Session session, Object[] row,
boolean delete) throws HsqlException {
if (row == null || Index.isNull(row, core.mainCols)) {
return core.refIndex.emptyIterator();
}
return delete
? core.refIndex.findFirstRowForDelete(session, row,
core.mainCols)
: core.refIndex.findFirstRow(session, row, core.mainCols);
}
/**
* For the candidate table row, finds any referring node in the main table.
* This is used to check referential integrity when updating a node. We
* have to make sure that the main table still holds a valid main record.
* If a valid row is found the corresponding <code>Node</code> is returned.
* Otherwise a 'INTEGRITY VIOLATION' Exception gets thrown.
*/
boolean hasMainRef(Session session, Object[] row) throws HsqlException {
if (Index.isNull(row, core.refCols)) {
return false;
}
boolean exists = core.mainIndex.exists(session, row, core.refCols);
// -- there has to be a valid node in the main table
// --
if (!exists) {
throw Trace.error(Trace.INTEGRITY_CONSTRAINT_VIOLATION_NOPARENT,
Trace.Constraint_violation, new Object[] {
core.refName.name, core.refTable.getName().name
});
}
return exists;
}
/**
* Test used before adding a new foreign key constraint. This method
* returns true if the given row has a corresponding row in the main
* table. Also returns true if any column covered by the foreign key
* constraint has a null value.
*/
private static boolean hasReferencedRow(Session session, Object[] rowdata,
int[] rowColArray, Index mainIndex) throws HsqlException {
if (Index.isNull(rowdata, rowColArray)) {
return true;
}
// else a record must exist in the main index
return mainIndex.exists(session, rowdata, rowColArray);
}
/**
* Check used before creating a new foreign key cosntraint, this method
* checks all rows of a table to ensure they all have a corresponding
* row in the main table.
*/
static void checkReferencedRows(Session session, Table table,
int[] rowColArray,
Index mainIndex) throws HsqlException {
RowIterator it = table.getPrimaryIndex().firstRow(session);
while (true) {
Row row = it.getNext();
if (row == null) {
break;
}
Object[] rowData = row.getData();
if (!Constraint.hasReferencedRow(session, rowData, rowColArray,
mainIndex)) {
String colValues = "";
for (int i = 0; i < rowColArray.length; i++) {
Object o = rowData[rowColArray[i]];
colValues += o;
colValues += ",";
}
throw Trace.error(
Trace.INTEGRITY_CONSTRAINT_VIOLATION_NOPARENT,
Trace.Constraint_violation, new Object[] {
colValues, table.getName().name
});
}
}
}
public Expression getCheckExpression() {
return check;
}
public OrderedHashSet getCheckColumnExpressions() {
OrderedHashSet set = new OrderedHashSet();
Expression.collectAllExpressions(set, check, Expression.COLUMN);
return set;
}
void recompile(Session session, Table newTable) throws HsqlException {
String ddl = check.getDDL();
Tokenizer tokenizer = new Tokenizer(ddl);
Parser parser = new Parser(session, tokenizer);
parser.read();
Expression condition = parser.readOr();
check = condition;
// this workaround is here to stop LIKE optimisation (for proper scripting)
check.setLikeOptimised();
Select s = Expression.getCheckSelect(session, newTable, check);
rangeVariable = s.rangeVariables[0];
rangeVariable.setForCheckConstraint();
}
void prepareCheckConstraint(Session session, Table table,
boolean checkValues) throws HsqlException {
// to ensure no subselects etc. are in condition
check.checkValidCheckConstraint();
// this workaround is here to stop LIKE optimisation
check.setLikeOptimised();
// if (table != null) {
Select s = Expression.getCheckSelect(session, table, check);
// if (checkValues) {
Result r = s.getResult(session, 1);
if (r.getNavigator().getSize() != 0) {
throw Trace.error(Trace.CHECK_CONSTRAINT_VIOLATION);
}
// }
rangeVariable = s.rangeVariables[0];
// removes reference to the Index object in range variable
rangeVariable.setForCheckConstraint();
// }
if (check.exprType == Expression.NOT
&& check.eArg.exprType == Expression.IS_NULL
&& check.eArg.eArg.exprType == Expression.COLUMN) {
notNullColumnIndex = check.eArg.eArg.getColumnIndex();
isNotNull = true;
}
}
}
The table below shows all metrics for Constraint.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 81.00 | Number of blocks | |
| BLOCK_COMMENT | 97.00 | Number of block comment lines | |
| COMMENTS | 244.00 | Comment lines | |
| COMMENT_DENSITY | 0.72 | Comment density | |
| COMPARISONS | 63.00 | Number of comparison operators | |
| CYCLOMATIC | 124.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 36.00 | Comments in declarations | |
| DOC_COMMENT | 125.00 | Number of javadoc comment lines | |
| ELOC | 337.00 | Effective lines of code | |
| EXEC_COMMENTS | 15.00 | Comments in executable code | |
| EXITS | 43.00 | Procedure exits | |
| FUNCTIONS | 45.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 90.67 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 154.00 | 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 | 0.00 | 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 | 1.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 1.00 | 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 | 2.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 1.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 1.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 32.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 4.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 18.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 1.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 4.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 13.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 6.00 | 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 | 1.00 | 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 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 1.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 1.00 | 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 | 1.00 | 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 | 2.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 1.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 815.00 | Number of lines in the source file | |
| LINE_COMMENT | 22.00 | Number of line comments | |
| LOC | 419.00 | Lines of code | |
| LOGICAL_LINES | 166.00 | Number of statements | |
| LOOPS | 3.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 977.00 | Number of operands | |
| OPERATORS | 1620.00 | Number of operators | |
| PARAMS | 60.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2597.00 | Halstead program length | |
| PROGRAM_VOCAB | 313.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 94.00 | Number of return points from functions | |
| SIZE | 26143.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 264.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 49.00 | Number of unique operators | |
| WHITESPACE | 152.00 | Number of whitespace lines | |