BeanMap.java
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|---|---|---|
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org.apache.commons.collections |
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Commons Collections |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| DOC_COMMENT | Number of javadoc comment lines |  |
| DECL_COMMENTS | Comments in declarations | |
| COMMENTS | Comment lines | |
| JAVA0242 | JAVA0242 Transient field in non-Serializable class | |
| RETURNS | Number of return points from functions | |
| SIZE | Size of the file in bytes | |
| FUNCTIONS | Number of function declarations | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| LINES | Number of lines in the source file | |
| BLOCKS | Number of blocks | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| CYCLOMATIC | Cyclomatic complexity | |
| LINE_COMMENT | Number of line comments | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| JAVA0179 | JAVA0179 Local variable hides visible field | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| EXITS | Procedure exits | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| LOC | Lines of code | |
| JAVA0115 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| ELOC | Effective lines of code | |
| PARAMS | Number of formal parameter declarations | |
| OPERATORS | Number of operators | |
| PROGRAM_LENGTH | Halstead program length | |
| JAVA0049 | JAVA0049 Nested block at depth N (maximum: M) | |
| LOGICAL_LINES | Number of statements | |
| OPERANDS | Number of operands | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0144 | JAVA0144 Line exceeds maximum M characters | |
| NEST_DEPTH | Maximum nesting depth | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0266 | JAVA0266 Use of System.out | |
| JAVA0132 | JAVA0132 Method overload with compatible signature | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0270 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* 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.commons.collections;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.AbstractMap;
import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import org.apache.commons.collections.list.UnmodifiableList;
import org.apache.commons.collections.keyvalue.AbstractMapEntry;
import org.apache.commons.collections.set.UnmodifiableSet;
/**
* An implementation of Map for JavaBeans which uses introspection to
* get and put properties in the bean.
* <p>
* If an exception occurs during attempts to get or set a property then the
* property is considered non existent in the Map
*
* @since Commons Collections 1.0
* @version $Revision: 480452 $ $Date: 2006-11-29 02:45:14 -0500 (Wed, 29 Nov 2006) $
*
* @author James Strachan
* @author Stephen Colebourne
* @author Dimiter Dimitrov
*
* @deprecated Identical class now available in commons-beanutils (full jar version).
* This version is due to be removed in collections v4.0.
*/
public class BeanMap extends AbstractMap implements Cloneable {
private transient Object bean;
private transient HashMap readMethods = new HashMap();
private transient HashMap writeMethods = new HashMap();
private transient HashMap types = new HashMap();
/**
* An empty array. Used to invoke accessors via reflection.
*/
public static final Object[] NULL_ARGUMENTS = {};
/**
* Maps primitive Class types to transformers. The transformer
* transform strings into the appropriate primitive wrapper.
*/
public static HashMap defaultTransformers = new HashMap();
static {
defaultTransformers.put(
Boolean.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Boolean.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Character.TYPE,
new Transformer() {
public Object transform( Object input ) {
return new Character( input.toString().charAt( 0 ) );
}
}
);
defaultTransformers.put(
Byte.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Byte.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Short.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Short.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Integer.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Integer.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Long.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Long.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Float.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Float.valueOf( input.toString() );
}
}
);
defaultTransformers.put(
Double.TYPE,
new Transformer() {
public Object transform( Object input ) {
return Double.valueOf( input.toString() );
}
}
);
}
// Constructors
//-------------------------------------------------------------------------
/**
* Constructs a new empty <code>BeanMap</code>.
*/
public BeanMap() {
}
/**
* Constructs a new <code>BeanMap</code> that operates on the
* specified bean. If the given bean is <code>null</code>, then
* this map will be empty.
*
* @param bean the bean for this map to operate on
*/
public BeanMap(Object bean) {
this.bean = bean;
initialise();
}
// Map interface
//-------------------------------------------------------------------------
public String toString() {
return "BeanMap<" + String.valueOf(bean) + ">";
}
/**
* Clone this bean map using the following process:
*
* <ul>
* <li>If there is no underlying bean, return a cloned BeanMap without a
* bean.
*
* <li>Since there is an underlying bean, try to instantiate a new bean of
* the same type using Class.newInstance().
*
* <li>If the instantiation fails, throw a CloneNotSupportedException
*
* <li>Clone the bean map and set the newly instantiated bean as the
* underlying bean for the bean map.
*
* <li>Copy each property that is both readable and writable from the
* existing object to a cloned bean map.
*
* <li>If anything fails along the way, throw a
* CloneNotSupportedException.
*
* <ul>
*/
public Object clone() throws CloneNotSupportedException {
BeanMap newMap = (BeanMap)super.clone();
if(bean == null) {
// no bean, just an empty bean map at the moment. return a newly
// cloned and empty bean map.
return newMap;
}
Object newBean = null;
Class beanClass = null;
try {
beanClass = bean.getClass();
newBean = beanClass.newInstance();
} catch (Exception e) {
// unable to instantiate
throw new CloneNotSupportedException
("Unable to instantiate the underlying bean \"" +
beanClass.getName() + "\": " + e);
}
try {
newMap.setBean(newBean);
} catch (Exception exception) {
throw new CloneNotSupportedException
("Unable to set bean in the cloned bean map: " +
exception);
}
try {
// copy only properties that are readable and writable. If its
// not readable, we can't get the value from the old map. If
// its not writable, we can't write a value into the new map.
Iterator readableKeys = readMethods.keySet().iterator();
while(readableKeys.hasNext()) {
Object key = readableKeys.next();
if(getWriteMethod(key) != null) {
newMap.put(key, get(key));
}
}
} catch (Exception exception) {
throw new CloneNotSupportedException
("Unable to copy bean values to cloned bean map: " +
exception);
}
return newMap;
}
/**
* Puts all of the writable properties from the given BeanMap into this
* BeanMap. Read-only and Write-only properties will be ignored.
*
* @param map the BeanMap whose properties to put
*/
public void putAllWriteable(BeanMap map) {
Iterator readableKeys = map.readMethods.keySet().iterator();
while (readableKeys.hasNext()) {
Object key = readableKeys.next();
if (getWriteMethod(key) != null) {
this.put(key, map.get(key));
}
}
}
/**
* This method reinitializes the bean map to have default values for the
* bean's properties. This is accomplished by constructing a new instance
* of the bean which the map uses as its underlying data source. This
* behavior for <code>clear()</code> differs from the Map contract in that
* the mappings are not actually removed from the map (the mappings for a
* BeanMap are fixed).
*/
public void clear() {
if(bean == null) return;
Class beanClass = null;
try {
beanClass = bean.getClass();
bean = beanClass.newInstance();
}
catch (Exception e) {
throw new UnsupportedOperationException( "Could not create new instance of class: " + beanClass );
}
}
/**
* Returns true if the bean defines a property with the given name.
* <p>
* The given name must be a <code>String</code>; if not, this method
* returns false. This method will also return false if the bean
* does not define a property with that name.
* <p>
* Write-only properties will not be matched as the test operates against
* property read methods.
*
* @param name the name of the property to check
* @return false if the given name is null or is not a <code>String</code>;
* false if the bean does not define a property with that name; or
* true if the bean does define a property with that name
*/
public boolean containsKey(Object name) {
Method method = getReadMethod(name);
return method != null;
}
/**
* Returns true if the bean defines a property whose current value is
* the given object.
*
* @param value the value to check
* @return false true if the bean has at least one property whose
* current value is that object, false otherwise
*/
public boolean containsValue(Object value) {
// use default implementation
return super.containsValue(value);
}
/**
* Returns the value of the bean's property with the given name.
* <p>
* The given name must be a {@link String} and must not be
* null; otherwise, this method returns <code>null</code>.
* If the bean defines a property with the given name, the value of
* that property is returned. Otherwise, <code>null</code> is
* returned.
* <p>
* Write-only properties will not be matched as the test operates against
* property read methods.
*
* @param name the name of the property whose value to return
* @return the value of the property with that name
*/
public Object get(Object name) {
if ( bean != null ) {
Method method = getReadMethod( name );
if ( method != null ) {
try {
return method.invoke( bean, NULL_ARGUMENTS );
}
catch ( IllegalAccessException e ) {
logWarn( e );
}
catch ( IllegalArgumentException e ) {
logWarn( e );
}
catch ( InvocationTargetException e ) {
logWarn( e );
}
catch ( NullPointerException e ) {
logWarn( e );
}
}
}
return null;
}
/**
* Sets the bean property with the given name to the given value.
*
* @param name the name of the property to set
* @param value the value to set that property to
* @return the previous value of that property
* @throws IllegalArgumentException if the given name is null;
* if the given name is not a {@link String}; if the bean doesn't
* define a property with that name; or if the bean property with
* that name is read-only
*/
public Object put(Object name, Object value) throws IllegalArgumentException, ClassCastException {
if ( bean != null ) {
Object oldValue = get( name );
Method method = getWriteMethod( name );
if ( method == null ) {
throw new IllegalArgumentException( "The bean of type: "+ bean.getClass().getName() + " has no property called: " + name );
}
try {
Object[] arguments = createWriteMethodArguments( method, value );
method.invoke( bean, arguments );
Object newValue = get( name );
firePropertyChange( name, oldValue, newValue );
}
catch ( InvocationTargetException e ) {
logInfo( e );
throw new IllegalArgumentException( e.getMessage() );
}
catch ( IllegalAccessException e ) {
logInfo( e );
throw new IllegalArgumentException( e.getMessage() );
}
return oldValue;
}
return null;
}
/**
* Returns the number of properties defined by the bean.
*
* @return the number of properties defined by the bean
*/
public int size() {
return readMethods.size();
}
/**
* Get the keys for this BeanMap.
* <p>
* Write-only properties are <b>not</b> included in the returned set of
* property names, although it is possible to set their value and to get
* their type.
*
* @return BeanMap keys. The Set returned by this method is not
* modifiable.
*/
public Set keySet() {
return UnmodifiableSet.decorate(readMethods.keySet());
}
/**
* Gets a Set of MapEntry objects that are the mappings for this BeanMap.
* <p>
* Each MapEntry can be set but not removed.
*
* @return the unmodifiable set of mappings
*/
public Set entrySet() {
return UnmodifiableSet.decorate(new AbstractSet() {
public Iterator iterator() {
return entryIterator();
}
public int size() {
return BeanMap.this.readMethods.size();
}
});
}
/**
* Returns the values for the BeanMap.
*
* @return values for the BeanMap. The returned collection is not
* modifiable.
*/
public Collection values() {
ArrayList answer = new ArrayList( readMethods.size() );
for ( Iterator iter = valueIterator(); iter.hasNext(); ) {
answer.add( iter.next() );
}
return UnmodifiableList.decorate(answer);
}
// Helper methods
//-------------------------------------------------------------------------
/**
* Returns the type of the property with the given name.
*
* @param name the name of the property
* @return the type of the property, or <code>null</code> if no such
* property exists
*/
public Class getType(String name) {
return (Class) types.get( name );
}
/**
* Convenience method for getting an iterator over the keys.
* <p>
* Write-only properties will not be returned in the iterator.
*
* @return an iterator over the keys
*/
public Iterator keyIterator() {
return readMethods.keySet().iterator();
}
/**
* Convenience method for getting an iterator over the values.
*
* @return an iterator over the values
*/
public Iterator valueIterator() {
final Iterator iter = keyIterator();
return new Iterator() {
public boolean hasNext() {
return iter.hasNext();
}
public Object next() {
Object key = iter.next();
return get(key);
}
public void remove() {
throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
}
};
}
/**
* Convenience method for getting an iterator over the entries.
*
* @return an iterator over the entries
*/
public Iterator entryIterator() {
final Iterator iter = keyIterator();
return new Iterator() {
public boolean hasNext() {
return iter.hasNext();
}
public Object next() {
Object key = iter.next();
Object value = get(key);
return new MyMapEntry( BeanMap.this, key, value );
}
public void remove() {
throw new UnsupportedOperationException( "remove() not supported for BeanMap" );
}
};
}
// Properties
//-------------------------------------------------------------------------
/**
* Returns the bean currently being operated on. The return value may
* be null if this map is empty.
*
* @return the bean being operated on by this map
*/
public Object getBean() {
return bean;
}
/**
* Sets the bean to be operated on by this map. The given value may
* be null, in which case this map will be empty.
*
* @param newBean the new bean to operate on
*/
public void setBean( Object newBean ) {
bean = newBean;
reinitialise();
}
/**
* Returns the accessor for the property with the given name.
*
* @param name the name of the property
* @return the accessor method for the property, or null
*/
public Method getReadMethod(String name) {
return (Method) readMethods.get(name);
}
/**
* Returns the mutator for the property with the given name.
*
* @param name the name of the property
* @return the mutator method for the property, or null
*/
public Method getWriteMethod(String name) {
return (Method) writeMethods.get(name);
}
// Implementation methods
//-------------------------------------------------------------------------
/**
* Returns the accessor for the property with the given name.
*
* @param name the name of the property
* @return null if the name is null; null if the name is not a
* {@link String}; null if no such property exists; or the accessor
* method for that property
*/
protected Method getReadMethod( Object name ) {
return (Method) readMethods.get( name );
}
/**
* Returns the mutator for the property with the given name.
*
* @param name the name of the
* @return null if the name is null; null if the name is not a
* {@link String}; null if no such property exists; null if the
* property is read-only; or the mutator method for that property
*/
protected Method getWriteMethod( Object name ) {
return (Method) writeMethods.get( name );
}
/**
* Reinitializes this bean. Called during {@link #setBean(Object)}.
* Does introspection to find properties.
*/
protected void reinitialise() {
readMethods.clear();
writeMethods.clear();
types.clear();
initialise();
}
private void initialise() {
if(getBean() == null) return;
Class beanClass = getBean().getClass();
try {
//BeanInfo beanInfo = Introspector.getBeanInfo( bean, null );
BeanInfo beanInfo = Introspector.getBeanInfo( beanClass );
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
if ( propertyDescriptors != null ) {
for ( int i = 0; i < propertyDescriptors.length; i++ ) {
PropertyDescriptor propertyDescriptor = propertyDescriptors[i];
if ( propertyDescriptor != null ) {
String name = propertyDescriptor.getName();
Method readMethod = propertyDescriptor.getReadMethod();
Method writeMethod = propertyDescriptor.getWriteMethod();
Class aType = propertyDescriptor.getPropertyType();
if ( readMethod != null ) {
readMethods.put( name, readMethod );
}
if ( writeMethod != null ) {
writeMethods.put( name, writeMethod );
}
types.put( name, aType );
}
}
}
}
catch ( IntrospectionException e ) {
logWarn( e );
}
}
/**
* Called during a successful {@link #put(Object,Object)} operation.
* Default implementation does nothing. Override to be notified of
* property changes in the bean caused by this map.
*
* @param key the name of the property that changed
* @param oldValue the old value for that property
* @param newValue the new value for that property
*/
protected void firePropertyChange( Object key, Object oldValue, Object newValue ) {
}
// Implementation classes
//-------------------------------------------------------------------------
/**
* Map entry used by {@link BeanMap}.
*/
protected static class MyMapEntry extends AbstractMapEntry {
private BeanMap owner;
/**
* Constructs a new <code>MyMapEntry</code>.
*
* @param owner the BeanMap this entry belongs to
* @param key the key for this entry
* @param value the value for this entry
*/
protected MyMapEntry( BeanMap owner, Object key, Object value ) {
super( key, value );
this.owner = owner;
}
/**
* Sets the value.
*
* @param value the new value for the entry
* @return the old value for the entry
*/
public Object setValue(Object value) {
Object key = getKey();
Object oldValue = owner.get( key );
owner.put( key, value );
Object newValue = owner.get( key );
super.setValue( newValue );
return oldValue;
}
}
/**
* Creates an array of parameters to pass to the given mutator method.
* If the given object is not the right type to pass to the method
* directly, it will be converted using {@link #convertType(Class,Object)}.
*
* @param method the mutator method
* @param value the value to pass to the mutator method
* @return an array containing one object that is either the given value
* or a transformed value
* @throws IllegalAccessException if {@link #convertType(Class,Object)}
* raises it
* @throws IllegalArgumentException if any other exception is raised
* by {@link #convertType(Class,Object)}
*/
protected Object[] createWriteMethodArguments( Method method, Object value ) throws IllegalAccessException, ClassCastException {
try {
if ( value != null ) {
Class[] types = method.getParameterTypes();
if ( types != null && types.length > 0 ) {
Class paramType = types[0];
if ( ! paramType.isAssignableFrom( value.getClass() ) ) {
value = convertType( paramType, value );
}
}
}
Object[] answer = { value };
return answer;
}
catch ( InvocationTargetException e ) {
logInfo( e );
throw new IllegalArgumentException( e.getMessage() );
}
catch ( InstantiationException e ) {
logInfo( e );
throw new IllegalArgumentException( e.getMessage() );
}
}
/**
* Converts the given value to the given type. First, reflection is
* is used to find a public constructor declared by the given class
* that takes one argument, which must be the precise type of the
* given value. If such a constructor is found, a new object is
* created by passing the given value to that constructor, and the
* newly constructed object is returned.<P>
*
* If no such constructor exists, and the given type is a primitive
* type, then the given value is converted to a string using its
* {@link Object#toString() toString()} method, and that string is
* parsed into the correct primitive type using, for instance,
* {@link Integer#valueOf(String)} to convert the string into an
* <code>int</code>.<P>
*
* If no special constructor exists and the given type is not a
* primitive type, this method returns the original value.
*
* @param newType the type to convert the value to
* @param value the value to convert
* @return the converted value
* @throws NumberFormatException if newType is a primitive type, and
* the string representation of the given value cannot be converted
* to that type
* @throws InstantiationException if the constructor found with
* reflection raises it
* @throws InvocationTargetException if the constructor found with
* reflection raises it
* @throws IllegalAccessException never
* @throws IllegalArgumentException never
*/
protected Object convertType( Class newType, Object value )
throws InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
// try call constructor
Class[] types = { value.getClass() };
try {
Constructor constructor = newType.getConstructor( types );
Object[] arguments = { value };
return constructor.newInstance( arguments );
}
catch ( NoSuchMethodException e ) {
// try using the transformers
Transformer transformer = getTypeTransformer( newType );
if ( transformer != null ) {
return transformer.transform( value );
}
return value;
}
}
/**
* Returns a transformer for the given primitive type.
*
* @param aType the primitive type whose transformer to return
* @return a transformer that will convert strings into that type,
* or null if the given type is not a primitive type
*/
protected Transformer getTypeTransformer( Class aType ) {
return (Transformer) defaultTransformers.get( aType );
}
/**
* Logs the given exception to <code>System.out</code>. Used to display
* warnings while accessing/mutating the bean.
*
* @param ex the exception to log
*/
protected void logInfo(Exception ex) {
// Deliberately do not use LOG4J or Commons Logging to avoid dependencies
System.out.println( "INFO: Exception: " + ex );
}
/**
* Logs the given exception to <code>System.err</code>. Used to display
* errors while accessing/mutating the bean.
*
* @param ex the exception to log
*/
protected void logWarn(Exception ex) {
// Deliberately do not use LOG4J or Commons Logging to avoid dependencies
System.out.println( "WARN: Exception: " + ex );
ex.printStackTrace();
}
}
The table below shows all metrics for BeanMap.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 93.00 | Number of blocks | |
| BLOCK_COMMENT | 16.00 | Number of block comment lines | |
| COMMENTS | 345.00 | Comment lines | |
| COMMENT_DENSITY | 1.18 | Comment density | |
| COMPARISONS | 26.00 | Number of comparison operators | |
| CYCLOMATIC | 86.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 43.00 | Comments in declarations | |
| DOC_COMMENT | 305.00 | Number of javadoc comment lines | |
| ELOC | 293.00 | Effective lines of code | |
| EXEC_COMMENTS | 9.00 | Comments in executable code | |
| EXITS | 58.00 | Procedure exits | |
| FUNCTIONS | 50.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 61.20 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 116.00 | 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 | 1.00 | 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 | 2.00 | 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 | 2.00 | 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 | 1.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 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 | 1.00 | 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 | 3.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 4.00 | 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 | 2.00 | 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 | 2.00 | 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 | 4.00 | 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 | 3.00 | 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 | 3.00 | 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 | 4.00 | 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 | 3.00 | 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 | 1.00 | 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 | 2.00 | 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 | 804.00 | Number of lines in the source file | |
| LINE_COMMENT | 24.00 | Number of line comments | |
| LOC | 393.00 | Lines of code | |
| LOGICAL_LINES | 168.00 | Number of statements | |
| LOOPS | 4.00 | Number of loops | |
| NEST_DEPTH | 6.00 | Maximum nesting depth | |
| OPERANDS | 765.00 | Number of operands | |
| OPERATORS | 1484.00 | Number of operators | |
| PARAMS | 35.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2249.00 | Halstead program length | |
| PROGRAM_VOCAB | 319.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 81.00 | Number of return points from functions | |
| SIZE | 28002.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 275.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 44.00 | Number of unique operators | |
| WHITESPACE | 66.00 | Number of whitespace lines | |