Blob.java
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|---|---|---|
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org.apache.derby.client.am |
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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 | |
|---|---|---|
| LINE_COMMENT | Number of line comments |  |
| BLOCKS | Number of blocks | |
| EXEC_COMMENTS | Comments in executable code | |
| SIZE | Size of the file in bytes | |
| RETURNS | Number of return points from functions | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0264 | JAVA0264 Integer math in long context - check for overflow | |
| CYCLOMATIC | Cyclomatic complexity | |
| LOC | Lines of code | |
| OPERATORS | Number of operators | |
| ELOC | Effective lines of code | |
| LINES | Number of lines in the source file | |
| PROGRAM_LENGTH | Halstead program length | |
| COMPARISONS | Number of comparison operators | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| PARAMS | Number of formal parameter declarations | |
| OPERANDS | Number of operands | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0067 | JAVA0067 Array descriptor on identifier name | |
| COMMENTS | Comment lines | |
| LOGICAL_LINES | Number of statements | |
| UNIQUE_OPERATORS | Number of unique operators | |
| PROGRAM_VOLUME | Halstead program volume | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| DECL_COMMENTS | Comments in declarations | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| EXITS | Procedure exits | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| FUNCTIONS | Number of function declarations | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| LOOPS | Number of loops | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
Derby - Class org.apache.derby.client.am.Blob
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.client.am;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.SQLException;
import org.apache.derby.shared.common.reference.SQLState;
public class Blob extends Lob implements java.sql.Blob {
//-----------------------------state------------------------------------------
byte[] binaryString_ = null;
// Only used for input purposes. For output, each getBinaryStream call
// must generate an independent stream.
java.io.InputStream binaryStream_ = null;
int dataOffset_;
//---------------------constructors/finalizer---------------------------------
public Blob(byte[] binaryString,
Agent agent,
int dataOffset) {
super(agent,
false);
binaryString_ = binaryString;
dataType_ |= BINARY_STRING;
setSqlLength(binaryString.length - dataOffset);
dataOffset_ = dataOffset;
}
// CTOR for input:
public Blob(Agent agent,
java.io.InputStream binaryStream,
int length) {
super(agent,
false);
binaryStream_ = binaryStream;
dataType_ |= BINARY_STREAM;
setSqlLength(length);
}
/**
* Create a new <code>Blob</code> from a stream with unknown length.
* <em>Important:</em> This constructor is a temporary solution for
* implementing lengthless overloads in the JDBC4 API. Before a proper
* solution can be implemented, we need to enable streaming without having
* to know the stream length in the DRDA protocol. See Jira DERBY-1471 and
* DERBY-1417 for more details.
*
* <em>Shortcomings:</em> This constructor will cause the <em>whole stream
* to be materialized</em> to determine its length. If the stream is big
* enough, the client will fail with an OutOfMemoryError. Since this is a
* temporary solution, state checking is not added to all methods as it
* would clutter up the class severely. After using the constructor, the
* <code>length</code>-method must be called, which will materialize the
* stream and determine the length. <em>Do not pass a Blob object created
* with this constructor to the user!</em>
*
* @param agent
* @param binaryStream the stream to get data from
*/
public Blob(Agent agent, java.io.InputStream binaryStream) {
super(agent,
isLayerBStreamingPossible(agent));
binaryStream_ = binaryStream;
dataType_ |= BINARY_STREAM;
}
/**
* Create a <code>Blob</code> object for a Blob value stored
* on the server and indentified by <code>locator</code>.
* @param agent context for this Blob object (incl. connection)
* @param locator reference id to Blob value on server
*/
public Blob(Agent agent, int locator)
{
super(agent, false);
locator_ = locator;
dataType_ |= LOCATOR;
}
// ---------------------------jdbc 2------------------------------------------
public long length() throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "length");
}
checkForClosedConnection();
long retVal = super.sqlLength();
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "length", retVal);
}
return retVal;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
/**
* Get the length in bytes of the <code>Blob</code> value represented by
* this locator based <Blob> object.
*
* A stored procedure call will be made to get it from the server.
* @throws org.apache.derby.client.am.SqlException
* @return length of Blob in bytes
*/
long getLocatorLength() throws SqlException
{
return agent_.connection_.locatorProcedureCall()
.blobGetLength(locator_);
}
/**
* Returns as an array of bytes part or all of the <code>BLOB</code>
* value that this <code>Blob</code> object designates. The byte
* array contains up to <code>length</code> consecutive bytes
* starting at position <code>pos</code>.
* The starting position must be between 1 and the length
* of the BLOB plus 1. This allows for zero-length BLOB values, from
* which only zero-length byte arrays can be returned.
* If a larger length is requested than there are bytes available,
* characters from the start position to the end of the BLOB are returned.
* @param pos the ordinal position of the first byte in the
* <code>BLOB</code> value to be extracted; the first byte is at
* position 1
* @param length is the number of consecutive bytes to be copied
* @return a byte array containing up to <code>length</code>
* consecutive bytes from the <code>BLOB</code> value designated
* by this <code>Blob</code> object, starting with the
* byte at position <code>startPos</code>.
* @exception SQLException if there is an error accessing the
* <code>BLOB</code>
* NOTE: If the starting position is the length of the BLOB plus 1,
* zero bytess are returned regardless of the length requested.
*/
public byte[] getBytes(long pos, int length) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "getBytes", (int) pos, length);
}
if (pos <= 0) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_BAD_POSITION),
new Long(pos));
}
if (pos > sqlLength() + 1) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_POSITION_TOO_LARGE),
new Long(pos));
}
if (length < 0) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_NONPOSITIVE_LENGTH),
new Integer(length));
}
byte[] retVal = getBytesX(pos, length);
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "getBytes", retVal);
}
return retVal;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
private byte[] getBytesX(long pos, int length) throws SqlException {
checkForClosedConnection();
long actualLength;
// actual length is the lesser of the number of bytes requested
// and the number of bytes available from pos to the end
actualLength = Math.min(sqlLength() - pos + 1, (long) length);
byte[] retVal;
if (isLocator()) {
retVal = agent_.connection_.locatorProcedureCall()
.blobGetBytes(locator_, pos, (int )actualLength);
} else {
retVal = new byte[(int) actualLength];
System.arraycopy(binaryString_, (int) pos + dataOffset_ - 1,
retVal, 0, (int) actualLength);
}
return retVal;
}
public java.io.InputStream getBinaryStream() throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "getBinaryStream");
}
java.io.InputStream retVal = getBinaryStreamX();
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "getBinaryStream", retVal);
}
return retVal;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
java.io.InputStream getBinaryStreamX() throws SqlException {
checkForClosedConnection();
if (isBinaryStream()) // this Lob is used for input
{
return binaryStream_;
} else if (isLocator()) {
//The Blob is locator enabled. Return a instance of the
//UpdateSensitive stream which wraps inside it a
//Buffered Locator stream. The wrapper watches out
//for updates.
return new UpdateSensitiveBlobLocatorInputStream
(agent_.connection_, this);
} else { // binary string
return new java.io.ByteArrayInputStream(binaryString_, dataOffset_,
binaryString_.length - dataOffset_);
}
}
public long position(byte[] pattern, long start) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "position(byte[], long)", pattern, start);
}
if (pattern == null) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_NULL_PATTERN_OR_SEARCH_STR));
}
if (start < 1) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_BAD_POSITION),
new Long(start));
}
long pos = positionX(pattern, start);
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "position(byte[], long)", pos);
}
return pos;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
private long positionX(byte[] pattern, long start) throws SqlException {
checkForClosedConnection();
if (isLocator()) {
return agent_.connection_.locatorProcedureCall()
.blobGetPositionFromBytes(locator_, pattern, start);
} else {
return binaryStringPosition(pattern, start);
}
}
public long position(java.sql.Blob pattern, long start) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "position(Blob, long)", pattern, start);
}
if (pattern == null) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_NULL_PATTERN_OR_SEARCH_STR));
}
if (start < 1) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_BAD_POSITION),
new Long(start));
}
long pos = positionX(pattern, start);
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "position(Blob, long)", pos);
}
return pos;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
private long positionX(java.sql.Blob pattern, long start) throws SqlException {
checkForClosedConnection();
try {
if (isLocator()) {
if ((pattern instanceof Blob)
&& ((Blob )pattern).isLocator()) {
// Send locator for pattern to server
return agent_.connection_.locatorProcedureCall()
.blobGetPositionFromLocator(locator_,
((Blob )pattern).getLocator(),
start);
} else {
// Convert pattern to byte array before sending to server
return agent_.connection_.locatorProcedureCall()
.blobGetPositionFromBytes(locator_,
pattern.getBytes(1L, (int )pattern.length()),
start);
}
} else {
return binaryStringPosition(
pattern.getBytes(1L, (int )pattern.length()),
start);
}
} catch (java.sql.SQLException e) {
throw new SqlException(e);
}
}
// -------------------------- JDBC 3.0 -----------------------------------
public int setBytes(long pos, byte[] bytes) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "setBytes", (int) pos, bytes);
}
int length = setBytesX(pos, bytes, 0, bytes.length);
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "setBytes", length);
}
return length;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
public int setBytes(long pos, byte[] bytes, int offset, int len) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "setBytes", (int) pos, bytes, offset, len);
}
int length = setBytesX(pos, bytes, offset, len);
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this, "setBytes", length);
}
return length;
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
public int setBytesX(long pos, byte[] bytes, int offset, int len) throws SqlException {
int length = 0;
/*
Check if position is less than 0 and if true
raise an exception
*/
if (pos <= 0L) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_BAD_POSITION), new Long(pos));
}
/*
Currently only 2G-1 bytes can be inserted in a
single Blob column hence check corresponding position
value
*/
if (pos >= Integer.MAX_VALUE) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_POSITION_TOO_LARGE), new Long(pos));
}
if (pos - 1 > sqlLength()) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_POSITION_TOO_LARGE),
new Long(pos));
}
if ((offset < 0) || offset > bytes.length )
{
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_INVALID_OFFSET),
new Integer(offset));
}
if ( len < 0 ) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_NONPOSITIVE_LENGTH),
new Integer(length));
}
if (len == 0) {
return 0;
}
length = Math.min((bytes.length - offset), len);
if (isLocator()) {
byte[] ba = bytes;
if ((offset > 0) || (length < bytes.length)) {
// Copy the part we will use into a new array
ba = new byte[length];
System.arraycopy(bytes, offset, ba, 0, length);
}
agent_.connection_.locatorProcedureCall()
.blobSetBytes(locator_, pos, length, ba);
if (pos+length-1 > sqlLength()) { // Wrote beyond the old end
// Update length
setSqlLength(pos + length - 1);
}
//The Blob value has been
//modified. Increment the
//updateCount to reflect the
//change.
incrementUpdateCount();
} else {
if ((binaryString_.length - dataOffset_ - (int)pos + 1) < length) {
byte newbuf[] = new byte[(int) pos + length + dataOffset_ - 1];
System.arraycopy(binaryString_, 0,
newbuf, 0, binaryString_.length);
binaryString_ = newbuf;
}
System.arraycopy(bytes, offset,
binaryString_, (int) pos + dataOffset_ - 1,
length);
binaryStream_ = new java.io.ByteArrayInputStream(binaryString_);
setSqlLength(binaryString_.length - dataOffset_);
}
return length;
}
public java.io.OutputStream setBinaryStream(long pos) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try {
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "setBinaryStream", (int) pos);
}
if (pos < 1) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.BLOB_BAD_POSITION),
new Long(pos));
}
OutputStream outStream;
if (isLocator()) {
outStream = new BlobLocatorOutputStream(agent_.connection_,
this,
pos);
} else {
outStream = new BlobOutputStream(this, pos);
}
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this,
"setBinaryStream",
outStream);
}
return outStream;
}
} catch ( SqlException se ) {
throw se.getSQLException();
}
}
public void truncate(long len) throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try
{
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, " truncate", (int) len);
}
if (len < 0 || len > sqlLength()) {
throw new SqlException(agent_.logWriter_,
new ClientMessageId(SQLState.INVALID_API_PARAMETER),
new Long(len), "len", "Blob.truncate()");
}
if (len == this.sqlLength()) {
return;
}
if (isLocator()) {
agent_.connection_.locatorProcedureCall()
.blobTruncate(locator_, len);
setSqlLength(len);
//The Blob value has been
//updated Increment the
//update count to reflect
//the change.
incrementUpdateCount();
} else {
long newLength = (int) len + dataOffset_;
byte newbuf[] = new byte[(int) len + dataOffset_];
System.arraycopy(binaryString_, 0,
newbuf, 0, (int) newLength);
binaryString_ = newbuf;
binaryStream_
= new java.io.ByteArrayInputStream(binaryString_);
setSqlLength(binaryString_.length - dataOffset_);
}
}
}
catch ( SqlException se )
{
throw se.getSQLException();
}
}
// -------------------------- JDBC 4.0 -----------------------------------
/**
* This method frees the <code>Blob</code> object and releases the resources that
* it holds. The object is invalid once the <code>free</code>
* method is called. If <code>free</code> is called multiple times, the subsequent
* calls to <code>free</code> are treated as a no-op.
*
* @throws SQLException if an error occurs releasing
* the Blob's resources
*/
public void free()
throws SQLException {
//calling free() on a already freed object is treated as a no-op
if (!isValid_) return;
//now that free has been called the Blob object is no longer
//valid
isValid_ = false;
try {
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "free");
}
if (isBinaryStream()) {
try {
binaryStream_.close();
} catch(IOException ioe) {
throw new SqlException(null, new ClientMessageId(
SQLState.IO_ERROR_UPON_LOB_FREE));
}
} else if (isLocator()) {
agent_.connection_.locatorProcedureCall()
.blobReleaseLocator(locator_);
} else {
binaryString_ = null;
}
}
} catch (SqlException se) {
throw se.getSQLException();
}
}
/**
* Returns an <code>InputStream</code> object that contains a partial <code>
* Blob</code> value, starting with the byte specified by pos,
* which is length bytes in length.
*
* @param pos the offset to the first byte of the partial value to
* be retrieved. The first byte in the <code>Blob</code> is at position 1.
* @param length the length in bytes of the partial value to be retrieved
* @return <code>InputStream</code> through which the partial
* <code>Blob</code> value can be read.
* @throws SQLException if pos is less than 1 or if pos is greater than
* the number of bytes in the <code>Blob</code> or if pos + length is
* greater than the number of bytes in the <code>Blob</code>
*/
public InputStream getBinaryStream(long pos, long length)
throws SQLException {
//call checkValidity to exit by throwing a SQLException if
//the Blob object has been freed by calling free() on it
checkValidity();
try {
synchronized (agent_.connection_) {
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceEntry(this, "getBinaryStream",
(int) pos, length);
}
checkPosAndLength(pos, length);
InputStream retVal;
if (isLocator()) {
//The Blob is locator enabled. Return an
//instance of the update sensitive stream
//that wraps inside it a Buffered InputStream.
//The wrapper watches out for updates to the
//underlying Blob.
retVal = new UpdateSensitiveBlobLocatorInputStream
(agent_.connection_,
this,
pos,
length);
} else { // binary string
retVal = new java.io.ByteArrayInputStream
(binaryString_,
(int)(dataOffset_ + pos - 1),
(int)length);
}
if (agent_.loggingEnabled()) {
agent_.logWriter_.traceExit(this,
"getBinaryStream",
retVal);
}
return retVal;
}
} catch ( SqlException se ) {
throw se.getSQLException();
}
}
//------------------ Material layer event callback methods -------------------
//---------------------------- helper methods --------------------------------
public boolean isBinaryString() {
return ((dataType_ & BINARY_STRING) == BINARY_STRING);
}
public boolean isBinaryStream() {
return ((dataType_ & BINARY_STREAM) == BINARY_STREAM);
}
public byte[] getBinaryString() {
return binaryString_;
}
protected long binaryStringPosition(byte[] pattern, long start) {
// perform a local byte string search, starting at start
// check that the range of comparison is valid
int index = (int) start + dataOffset_ - 1; // api start begins at 1
while (index + pattern.length <= binaryString_.length) {
if (isSubString(pattern, index)) {
return (long) (index - dataOffset_ + 1); // readjust for api indexing
}
index++;
}
return -1L; // not found
}
// precondition: binaryString_ is long enough for the comparison
protected boolean isSubString(byte[] pattern, int index) {
for (int i = 0; i < pattern.length; i++, index++) {
if (pattern[i] != binaryString_[index]) {
return false;
}
}
return true;
}
/**
* Materialize the stream used for input to the database.
*
* @throws SqlException
*/
protected void materializeStream() throws SqlException
{
binaryStream_ = super.materializeStream(binaryStream_, "java.sql.Blob");
}
}
The table below shows all metrics for Blob.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 129.00 | Number of blocks | |
| BLOCK_COMMENT | 29.00 | Number of block comment lines | |
| COMMENTS | 173.00 | Comment lines | |
| COMMENT_DENSITY | 0.47 | Comment density | |
| COMPARISONS | 62.00 | Number of comparison operators | |
| CYCLOMATIC | 100.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 18.00 | Comments in declarations | |
| DOC_COMMENT | 85.00 | Number of javadoc comment lines | |
| ELOC | 367.00 | Effective lines of code | |
| EXEC_COMMENTS | 24.00 | Comments in executable code | |
| EXITS | 44.00 | Procedure exits | |
| FUNCTIONS | 27.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 119.90 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 118.00 | 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 | 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 | 1.00 | 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 | 2.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 0.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 0.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | 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 | 8.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 1.00 | 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 | 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 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 4.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 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 | 1.00 | 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 | 5.00 | 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 | 745.00 | Number of lines in the source file | |
| LINE_COMMENT | 59.00 | Number of line comments | |
| LOC | 501.00 | Lines of code | |
| LOGICAL_LINES | 168.00 | Number of statements | |
| LOOPS | 2.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 897.00 | Number of operands | |
| OPERATORS | 2043.00 | Number of operators | |
| PARAMS | 40.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2940.00 | Halstead program length | |
| PROGRAM_VOCAB | 256.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 78.00 | Number of return points from functions | |
| SIZE | 28645.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 202.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 54.00 | Number of unique operators | |
| WHITESPACE | 71.00 | Number of whitespace lines | |