SingletonMap.java
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org.apache.commons.collections.map |
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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 | |
|---|---|---|
| DECL_COMMENTS | Comments in declarations |  |
| JAVA0081 | JAVA0081 Boolean literal in comparison | |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0075 | JAVA0075 Method parameter hides field | |
| FUNCTIONS | Number of function declarations | |
| COMMENTS | Comment lines | |
| RETURNS | Number of return points from functions | |
| JAVA0058 | JAVA0058 Constructor calls super() | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| SIZE | Size of the file in bytes | |
| CYCLOMATIC | Cyclomatic complexity | |
| LINES | Number of lines in the source file | |
| JAVA0150 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0096 | JAVA0096 Field in nested class hides outer field | |
| BLOCKS | Number of blocks | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| UNIQUE_OPERATORS | Number of unique operators | |
| LOOPS | Number of loops | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| 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.map;
import java.io.Serializable;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import org.apache.commons.collections.BoundedMap;
import org.apache.commons.collections.KeyValue;
import org.apache.commons.collections.MapIterator;
import org.apache.commons.collections.OrderedMap;
import org.apache.commons.collections.OrderedMapIterator;
import org.apache.commons.collections.ResettableIterator;
import org.apache.commons.collections.iterators.SingletonIterator;
import org.apache.commons.collections.keyvalue.TiedMapEntry;
/**
* A <code>Map</code> implementation that holds a single item and is fixed size.
* <p>
* The single key/value pair is specified at creation.
* The map is fixed size so any action that would change the size is disallowed.
* However, the <code>put</code> or <code>setValue</code> methods can <i>change</i>
* the value associated with the key.
* <p>
* If trying to remove or clear the map, an UnsupportedOperationException is thrown.
* If trying to put a new mapping into the map, an IllegalArgumentException is thrown.
* The put method will only suceed if the key specified is the same as the
* singleton key.
* <p>
* The key and value can be obtained by:
* <ul>
* <li>normal Map methods and views
* <li>the <code>MapIterator</code>, see {@link #mapIterator()}
* <li>the <code>KeyValue</code> interface (just cast - no object creation)
* </ul>
*
* @since Commons Collections 3.1
* @version $Revision: 480452 $ $Date: 2006-11-29 02:45:14 -0500 (Wed, 29 Nov 2006) $
*
* @author Stephen Colebourne
*/
public class SingletonMap
implements OrderedMap, BoundedMap, KeyValue, Serializable, Cloneable {
/** Serialization version */
private static final long serialVersionUID = -8931271118676803261L;
/** Singleton key */
private final Object key;
/** Singleton value */
private Object value;
/**
* Constructor that creates a map of <code>null</code> to <code>null</code>.
*/
public SingletonMap() {
super();
this.key = null;
}
/**
* Constructor specifying the key and value.
*
* @param key the key to use
* @param value the value to use
*/
public SingletonMap(Object key, Object value) {
super();
this.key = key;
this.value = value;
}
/**
* Constructor specifying the key and value as a <code>KeyValue</code>.
*
* @param keyValue the key value pair to use
*/
public SingletonMap(KeyValue keyValue) {
super();
this.key = keyValue.getKey();
this.value = keyValue.getValue();
}
/**
* Constructor specifying the key and value as a <code>MapEntry</code>.
*
* @param mapEntry the mapEntry to use
*/
public SingletonMap(Map.Entry mapEntry) {
super();
this.key = mapEntry.getKey();
this.value = mapEntry.getValue();
}
/**
* Constructor copying elements from another map.
*
* @param map the map to copy, must be size 1
* @throws NullPointerException if the map is null
* @throws IllegalArgumentException if the size is not 1
*/
public SingletonMap(Map map) {
super();
if (map.size() != 1) {
throw new IllegalArgumentException("The map size must be 1");
}
Map.Entry entry = (Map.Entry) map.entrySet().iterator().next();
this.key = entry.getKey();
this.value = entry.getValue();
}
// KeyValue
//-----------------------------------------------------------------------
/**
* Gets the key.
*
* @return the key
*/
public Object getKey() {
return key;
}
/**
* Gets the value.
*
* @return the value
*/
public Object getValue() {
return value;
}
/**
* Sets the value.
*
* @param value the new value to set
* @return the old value
*/
public Object setValue(Object value) {
Object old = this.value;
this.value = value;
return old;
}
// BoundedMap
//-----------------------------------------------------------------------
/**
* Is the map currently full, always true.
*
* @return true always
*/
public boolean isFull() {
return true;
}
/**
* Gets the maximum size of the map, always 1.
*
* @return 1 always
*/
public int maxSize() {
return 1;
}
// Map
//-----------------------------------------------------------------------
/**
* Gets the value mapped to the key specified.
*
* @param key the key
* @return the mapped value, null if no match
*/
public Object get(Object key) {
if (isEqualKey(key)) {
return value;
}
return null;
}
/**
* Gets the size of the map, always 1.
*
* @return the size of 1
*/
public int size() {
return 1;
}
/**
* Checks whether the map is currently empty, which it never is.
*
* @return false always
*/
public boolean isEmpty() {
return false;
}
//-----------------------------------------------------------------------
/**
* Checks whether the map contains the specified key.
*
* @param key the key to search for
* @return true if the map contains the key
*/
public boolean containsKey(Object key) {
return (isEqualKey(key));
}
/**
* Checks whether the map contains the specified value.
*
* @param value the value to search for
* @return true if the map contains the key
*/
public boolean containsValue(Object value) {
return (isEqualValue(value));
}
//-----------------------------------------------------------------------
/**
* Puts a key-value mapping into this map where the key must match the existing key.
* <p>
* An IllegalArgumentException is thrown if the key does not match as the map
* is fixed size.
*
* @param key the key to set, must be the key of the map
* @param value the value to set
* @return the value previously mapped to this key, null if none
* @throws IllegalArgumentException if the key does not match
*/
public Object put(Object key, Object value) {
if (isEqualKey(key)) {
return setValue(value);
}
throw new IllegalArgumentException("Cannot put new key/value pair - Map is fixed size singleton");
}
/**
* Puts the values from the specified map into this map.
* <p>
* The map must be of size 0 or size 1.
* If it is size 1, the key must match the key of this map otherwise an
* IllegalArgumentException is thrown.
*
* @param map the map to add, must be size 0 or 1, and the key must match
* @throws NullPointerException if the map is null
* @throws IllegalArgumentException if the key does not match
*/
public void putAll(Map map) {
switch (map.size()) {
case 0:
return;
case 1:
Map.Entry entry = (Map.Entry) map.entrySet().iterator().next();
put(entry.getKey(), entry.getValue());
return;
default:
throw new IllegalArgumentException("The map size must be 0 or 1");
}
}
/**
* Unsupported operation.
*
* @param key the mapping to remove
* @return the value mapped to the removed key, null if key not in map
* @throws UnsupportedOperationException always
*/
public Object remove(Object key) {
throw new UnsupportedOperationException();
}
/**
* Unsupported operation.
*/
public void clear() {
throw new UnsupportedOperationException();
}
//-----------------------------------------------------------------------
/**
* Gets the entrySet view of the map.
* Changes made via <code>setValue</code> affect this map.
* To simply iterate through the entries, use {@link #mapIterator()}.
*
* @return the entrySet view
*/
public Set entrySet() {
Map.Entry entry = new TiedMapEntry(this, getKey());
return Collections.singleton(entry);
}
/**
* Gets the unmodifiable keySet view of the map.
* Changes made to the view affect this map.
* To simply iterate through the keys, use {@link #mapIterator()}.
*
* @return the keySet view
*/
public Set keySet() {
return Collections.singleton(key);
}
/**
* Gets the unmodifiable values view of the map.
* Changes made to the view affect this map.
* To simply iterate through the values, use {@link #mapIterator()}.
*
* @return the values view
*/
public Collection values() {
return new SingletonValues(this);
}
/**
* Gets an iterator over the map.
* Changes made to the iterator using <code>setValue</code> affect this map.
* The <code>remove</code> method is unsupported.
* <p>
* A MapIterator returns the keys in the map. It also provides convenient
* methods to get the key and value, and set the value.
* It avoids the need to create an entrySet/keySet/values object.
* It also avoids creating the Map Entry object.
*
* @return the map iterator
*/
public MapIterator mapIterator() {
return new SingletonMapIterator(this);
}
// OrderedMap
//-----------------------------------------------------------------------
/**
* Obtains an <code>OrderedMapIterator</code> over the map.
* <p>
* A ordered map iterator is an efficient way of iterating over maps
* in both directions.
*
* @return an ordered map iterator
*/
public OrderedMapIterator orderedMapIterator() {
return new SingletonMapIterator(this);
}
/**
* Gets the first (and only) key in the map.
*
* @return the key
*/
public Object firstKey() {
return getKey();
}
/**
* Gets the last (and only) key in the map.
*
* @return the key
*/
public Object lastKey() {
return getKey();
}
/**
* Gets the next key after the key specified, always null.
*
* @param key the next key
* @return null always
*/
public Object nextKey(Object key) {
return null;
}
/**
* Gets the previous key before the key specified, always null.
*
* @param key the next key
* @return null always
*/
public Object previousKey(Object key) {
return null;
}
//-----------------------------------------------------------------------
/**
* Compares the specified key to the stored key.
*
* @param key the key to compare
* @return true if equal
*/
protected boolean isEqualKey(Object key) {
return (key == null ? getKey() == null : key.equals(getKey()));
}
/**
* Compares the specified value to the stored value.
*
* @param value the value to compare
* @return true if equal
*/
protected boolean isEqualValue(Object value) {
return (value == null ? getValue() == null : value.equals(getValue()));
}
//-----------------------------------------------------------------------
/**
* SingletonMapIterator.
*/
static class SingletonMapIterator implements OrderedMapIterator, ResettableIterator {
private final SingletonMap parent;
private boolean hasNext = true;
private boolean canGetSet = false;
SingletonMapIterator(SingletonMap parent) {
super();
this.parent = parent;
}
public boolean hasNext() {
return hasNext;
}
public Object next() {
if (hasNext == false) {
throw new NoSuchElementException(AbstractHashedMap.NO_NEXT_ENTRY);
}
hasNext = false;
canGetSet = true;
return parent.getKey();
}
public boolean hasPrevious() {
return (hasNext == false);
}
public Object previous() {
if (hasNext == true) {
throw new NoSuchElementException(AbstractHashedMap.NO_PREVIOUS_ENTRY);
}
hasNext = true;
return parent.getKey();
}
public void remove() {
throw new UnsupportedOperationException();
}
public Object getKey() {
if (canGetSet == false) {
throw new IllegalStateException(AbstractHashedMap.GETKEY_INVALID);
}
return parent.getKey();
}
public Object getValue() {
if (canGetSet == false) {
throw new IllegalStateException(AbstractHashedMap.GETVALUE_INVALID);
}
return parent.getValue();
}
public Object setValue(Object value) {
if (canGetSet == false) {
throw new IllegalStateException(AbstractHashedMap.SETVALUE_INVALID);
}
return parent.setValue(value);
}
public void reset() {
hasNext = true;
}
public String toString() {
if (hasNext) {
return "Iterator[]";
} else {
return "Iterator[" + getKey() + "=" + getValue() + "]";
}
}
}
/**
* Values implementation for the SingletonMap.
* This class is needed as values is a view that must update as the map updates.
*/
static class SingletonValues extends AbstractSet implements Serializable {
private static final long serialVersionUID = -3689524741863047872L;
private final SingletonMap parent;
SingletonValues(SingletonMap parent) {
super();
this.parent = parent;
}
public int size() {
return 1;
}
public boolean isEmpty() {
return false;
}
public boolean contains(Object object) {
return parent.containsValue(object);
}
public void clear() {
throw new UnsupportedOperationException();
}
public Iterator iterator() {
return new SingletonIterator(parent.getValue(), false);
}
}
//-----------------------------------------------------------------------
/**
* Clones the map without cloning the key or value.
*
* @return a shallow clone
*/
public Object clone() {
try {
SingletonMap cloned = (SingletonMap) super.clone();
return cloned;
} catch (CloneNotSupportedException ex) {
throw new InternalError();
}
}
/**
* Compares this map with another.
*
* @param obj the object to compare to
* @return true if equal
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj instanceof Map == false) {
return false;
}
Map other = (Map) obj;
if (other.size() != 1) {
return false;
}
Map.Entry entry = (Map.Entry) other.entrySet().iterator().next();
return isEqualKey(entry.getKey()) && isEqualValue(entry.getValue());
}
/**
* Gets the standard Map hashCode.
*
* @return the hash code defined in the Map interface
*/
public int hashCode() {
return (getKey() == null ? 0 : getKey().hashCode()) ^
(getValue() == null ? 0 : getValue().hashCode());
}
/**
* Gets the map as a String.
*
* @return a string version of the map
*/
public String toString() {
return new StringBuffer(128)
.append('{')
.append((getKey() == this ? "(this Map)" : getKey()))
.append('=')
.append((getValue() == this ? "(this Map)" : getValue()))
.append('}')
.toString();
}
}
The table below shows all metrics for SingletonMap.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 66.00 | Number of blocks | |
| BLOCK_COMMENT | 16.00 | Number of block comment lines | |
| COMMENTS | 273.00 | Comment lines | |
| COMMENT_DENSITY | 1.40 | Comment density | |
| COMPARISONS | 30.00 | Number of comparison operators | |
| CYCLOMATIC | 74.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 51.00 | Comments in declarations | |
| DOC_COMMENT | 243.00 | Number of javadoc comment lines | |
| ELOC | 195.00 | Effective lines of code | |
| EXEC_COMMENTS | 0.00 | Comments in executable code | |
| EXITS | 24.00 | Procedure exits | |
| FUNCTIONS | 51.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 60.24 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 89.00 | 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 | 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 | 7.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 10.00 | 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 | 7.00 | 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 | 1.00 | 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 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 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 | 1.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 0.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 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 | 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 | 593.00 | Number of lines in the source file | |
| LINE_COMMENT | 14.00 | Number of line comments | |
| LOC | 263.00 | Lines of code | |
| LOGICAL_LINES | 114.00 | Number of statements | |
| LOOPS | 0.00 | Number of loops | |
| NEST_DEPTH | 2.00 | Maximum nesting depth | |
| OPERANDS | 440.00 | Number of operands | |
| OPERATORS | 1068.00 | Number of operators | |
| PARAMS | 22.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 1508.00 | Halstead program length | |
| PROGRAM_VOCAB | 214.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 67.00 | Number of return points from functions | |
| SIZE | 17260.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 168.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 46.00 | Number of unique operators | |
| WHITESPACE | 57.00 | Number of whitespace lines | |