JSONObject.java
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|---|---|---|
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org.apache.tapestry.json |
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Apache Tapestry 5 |
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 |  |
| DOC_COMMENT | Number of javadoc comment lines | |
| COMMENTS | Comment lines | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| SIZE | Size of the file in bytes | |
| CYCLOMATIC | Cyclomatic complexity | |
| LINES | Number of lines in the source file | |
| RETURNS | Number of return points from functions | |
| JAVA0031 | JAVA0031 Case statement not properly closed | |
| COMPARISONS | Number of comparison operators | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| LOC | Lines of code | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| BLOCKS | Number of blocks | |
| EXITS | Procedure exits | |
| LINE_COMMENT | Number of line comments | |
| UNIQUE_OPERATORS | Number of unique operators | |
| FUNCTIONS | Number of function declarations | |
| OPERATORS | Number of operators | |
| ELOC | Effective lines of code | |
| PROGRAM_LENGTH | Halstead program length | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| OPERANDS | Number of operands | |
| LOGICAL_LINES | Number of statements | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0285 | JAVA0285 Dereference of potentially null variable | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PARAMS | Number of formal parameter declarations | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
// Copyright 2007 The Apache Software Foundation
//
// Licensed 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.tapestry.json;
/*
Copyright (c) 2002 JSON.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
The Software shall be used for Good, not Evil.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
import org.apache.tapestry.ioc.internal.util.CollectionFactory;
import java.util.Map;
import java.util.Set;
/**
* A JSONObject is an unordered collection of name/value pairs. Its external form is a string
* wrapped in curly braces with colons between the names and values, and commas between the values
* and names. The internal form is an object having <code>get</code> and <code>opt</code>
* methods for accessing the values by name, and <code>put</code> methods for adding or replacing
* values by name. The values can be any of these types: <code>Boolean</code>,
* <code>JSONArray</code>, <code>JSONObject</code>, <code>Number</code>,
* <code>String</code>, or the <code>JSONObject.NULL</code> object. A JSONObject constructor
* can be used to convert an external form JSON text into an internal form whose values can be
* retrieved with the <code>get</code> and <code>opt</code> methods, or to convert values into a
* JSON text using the <code>put</code> and <code>toString</code> methods. A <code>get</code>
* method returns a value if one can be found, and throws an exception if one cannot be found. An
* <code>opt</code> method returns a default value instead of throwing an exception, and so is
* useful for obtaining optional values.
* <p/>
* The generic <code>get()</code> and <code>opt()</code> methods return an object, which you can
* cast or query for type. There are also typed <code>get</code> and <code>opt</code> methods
* that do type checking and type coersion for you.
* <p/>
* The <code>put</code> methods adds values to an object. For example,
* <p/>
* <pre>
* myString = new JSONObject().put("JSON", "Hello, World!").toString();
* </pre>
* <p/>
* produces the string <code>{"JSON": "Hello, World"}</code>.
* <p/>
* The texts produced by the <code>toString</code> methods strictly conform to the JSON sysntax
* rules. The constructors are more forgiving in the texts they will accept:
* <ul>
* <li>An extra <code>,</code> <small>(comma)</small> may appear just before the closing
* brace.</li>
* <li>Strings may be quoted with <code>'</code> <small>(single quote)</small>.</li>
* <li>Strings do not need to be quoted at all if they do not begin with a quote or single quote,
* and if they do not contain leading or trailing spaces, and if they do not contain any of these
* characters: <code>{ } [ ] / \ : , = ; #</code> and if they do not look like numbers and if they
* are not the reserved words <code>true</code>, <code>false</code>, or <code>null</code>.</li>
* <li>Keys can be followed by <code>=</code> or <code>=></code> as well as by <code>:</code>.</li>
* <li>Values can be followed by <code>;</code> <small>(semicolon)</small> as well as by
* <code>,</code> <small>(comma)</small>.</li>
* <li>Numbers may have the <code>0-</code> <small>(octal)</small> or <code>0x-</code>
* <small>(hex)</small> prefix.</li>
* <li>Comments written in the slashshlash, slashstar, and hash conventions will be ignored.</li>
* </ul>
* <hr/>
* <p/>
* This class, and the other related classes, have been heavily modified from the original source,
* to fit Tapestry standards and to make use of JDK 1.5 features such as generics. Further, since
* the interest of Tapestry is primarily constructing JSON (and not parsing it), many of the
* non-essential methods have been removed (since the original code came with no tests).
*
* @author JSON.org
* @version 2
*/
public final class JSONObject
{
/**
* JSONObject.NULL is equivalent to the value that JavaScript calls null, whilst Java's null is
* equivalent to the value that JavaScript calls undefined.
*/
private static final class Null
{
/**
* There is only intended to be a single instance of the NULL object, so the clone method
* returns itself.
*
* @return NULL.
*/
@Override
protected final Object clone()
{
return this;
}
/**
* A Null object is equal to the null value and to itself.
*
* @param object An object to test for nullness.
* @return true if the object parameter is the JSONObject.NULL object or null.
*/
@Override
public boolean equals(Object object)
{
return object == null || object == this;
}
/**
* Get the "null" string value.
*
* @return The string "null".
*/
@Override
public String toString()
{
return "null";
}
}
/**
* The map where the JSONObject's properties are kept.
*/
private final Map<String, Object> _properties = CollectionFactory.newMap();
/**
* It is sometimes more convenient and less ambiguous to have a <code>NULL</code> object than
* to use Java's <code>null</code> value. <code>JSONObject.NULL.equals(null)</code> returns
* <code>true</code>. <code>JSONObject.NULL.toString()</code> returns <code>"null"</code>.
*/
public static final Object NULL = new Null();
/**
* Construct an empty JSONObject.
*/
public JSONObject()
{
}
/**
* Construct a JSONObject from a subset of another JSONObject. An array of strings is used to
* identify the keys that should be copied. Missing keys are ignored.
*
* @param source A JSONObject.
* @param propertyNames The strings to copy.
* @throws RuntimeException If a value is a non-finite number.
*/
public JSONObject(JSONObject source, String... propertyNames)
{
for (String name : propertyNames)
{
Object value = source.opt(name);
if (value != null) put(name, value);
}
}
/**
* Construct a JSONObject from a JSONTokener.
*
* @param x A JSONTokener object containing the source string. @ If there is a syntax error in the source
* string.
*/
JSONObject(JSONTokener x)
{
String key;
if (x.nextClean() != '{')
{
throw x.syntaxError("A JSONObject text must begin with '{'");
}
while (true)
{
char c = x.nextClean();
switch (c)
{
case 0:
throw x.syntaxError("A JSONObject text must end with '}'");
case '}':
return;
default:
x.back();
key = x.nextValue().toString();
}
/*
* The key is followed by ':'. We will also tolerate '=' or '=>'.
*/
c = x.nextClean();
if (c == '=')
{
if (x.next() != '>')
{
x.back();
}
}
else if (c != ':')
{
throw x.syntaxError("Expected a ':' after a key");
}
put(key, x.nextValue());
/*
* Pairs are separated by ','. We will also tolerate ';'.
*/
switch (x.nextClean())
{
case ';':
case ',':
if (x.nextClean() == '}')
{
return;
}
x.back();
break;
case '}':
return;
default:
throw x.syntaxError("Expected a ',' or '}'");
}
}
}
/**
* Construct a JSONObject from a string. This is the most commonly used JSONObject constructor.
*
* @param string A string beginning with <code>{</code> <small>(left brace)</small> and
* ending with <code>}</code> <small>(right brace)</small>.
* @throws RuntimeException If there is a syntax error in the source string.
*/
public JSONObject(String string)
{
this(new JSONTokener(string));
}
/**
* Accumulate values under a key. It is similar to the put method except that if there is
* already an object stored under the key then a JSONArray is stored under the key to hold all
* of the accumulated values. If there is already a JSONArray, then the new value is appended to
* it. In contrast, the put method replaces the previous value.
*
* @param key A key string.
* @param value An object to be accumulated under the key.
* @return this.
* @throws {@link RuntimeException}
* If the value is an invalid number or if the key is null.
*/
public JSONObject accumulate(String key, Object value)
{
testValidity(value);
Object existing = opt(key);
if (existing == null)
{
// Note that the original implementation of this method contradicited the method
// documentation.
put(key, value);
return this;
}
if (existing instanceof JSONArray)
{
((JSONArray) existing).put(value);
return this;
}
// Replace the existing value, of any type, with an array that includes both the
// existing and the new value.
put(key, new JSONArray().put(existing).put(value));
return this;
}
/**
* Append values to the array under a key. If the key does not exist in the JSONObject, then the
* key is put in the JSONObject with its value being a JSONArray containing the value parameter.
* If the key was already associated with a JSONArray, then the value parameter is appended to
* it.
*
* @param key A key string.
* @param value An object to be accumulated under the key.
* @return this. @ If the key is null or if the current value associated with the key is not a
* JSONArray.
*/
public JSONObject append(String key, Object value)
{
testValidity(value);
Object o = opt(key);
if (o == null)
{
put(key, new JSONArray().put(value));
}
else if (o instanceof JSONArray)
{
put(key, ((JSONArray) o).put(value));
}
else
{
throw new RuntimeException("JSONObject[" + quote(key) + "] is not a JSONArray.");
}
return this;
}
/**
* Produce a string from a double. The string "null" will be returned if the number is not
* finite.
*
* @param d A double.
* @return A String.
*/
static String doubleToString(double d)
{
if (Double.isInfinite(d) || Double.isNaN(d))
{
return "null";
}
// Shave off trailing zeros and decimal point, if possible.
String s = Double.toString(d);
if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0)
{
while (s.endsWith("0"))
{
s = s.substring(0, s.length() - 1);
}
if (s.endsWith("."))
{
s = s.substring(0, s.length() - 1);
}
}
return s;
}
/**
* Get the value object associated with a key.
*
* @param key A key string.
* @return The object associated with the key. @ if the key is not found.
* @see #opt(String)
*/
public Object get(String key)
{
Object o = opt(key);
if (o == null)
{
throw new RuntimeException("JSONObject[" + quote(key) + "] not found.");
}
return o;
}
/**
* Get the boolean value associated with a key.
*
* @param key A key string.
* @return The truth.
* @throws RuntimeException if the value is not a Boolean or the String "true" or "false".
*/
public boolean getBoolean(String key)
{
Object o = get(key);
if (o instanceof Boolean) return o.equals(Boolean.TRUE);
if (o instanceof String)
{
String value = (String) o;
if (value.equalsIgnoreCase("true")) return true;
if (value.equalsIgnoreCase("false")) return false;
}
throw new RuntimeException("JSONObject[" + quote(key) + "] is not a Boolean.");
}
/**
* Get the double value associated with a key.
*
* @param key A key string.
* @return The numeric value. @ if the key is not found or if the value is not a Number object
* and cannot be converted to a number.
*/
public double getDouble(String key)
{
Object value = get(key);
try
{
if (value instanceof Number) return ((Number) value).doubleValue();
// This is a bit sloppy for the case where value is not a string.
return Double.valueOf((String) value).doubleValue();
}
catch (Exception e)
{
throw new RuntimeException("JSONObject[" + quote(key) + "] is not a number.");
}
}
/**
* Get the int value associated with a key. If the number value is too large for an int, it will
* be clipped.
*
* @param key A key string.
* @return The integer value. @ if the key is not found or if the value cannot be converted to
* an integer.
*/
public int getInt(String key)
{
Object value = get(key);
if (value instanceof Number) return ((Number) value).intValue();
// Very inefficient way to do this!
return (int) getDouble(key);
}
/**
* Get the JSONArray value associated with a key.
*
* @param key A key string.
* @return A JSONArray which is the value.
* @throws RuntimeException if the key is not found or if the value is not a JSONArray.
*/
public JSONArray getJSONArray(String key)
{
Object o = get(key);
if (o instanceof JSONArray)
{
return (JSONArray) o;
}
throw new RuntimeException("JSONObject[" + quote(key) + "] is not a JSONArray.");
}
/**
* Get the JSONObject value associated with a key.
*
* @param key A key string.
* @return A JSONObject which is the value.
* @throws RuntimeException if the key is not found or if the value is not a JSONObject.
*/
public JSONObject getJSONObject(String key)
{
Object o = get(key);
if (o instanceof JSONObject)
{
return (JSONObject) o;
}
throw new RuntimeException("JSONObject[" + quote(key) + "] is not a JSONObject.");
}
/**
* Get the long value associated with a key. If the number value is too long for a long, it will
* be clipped.
*
* @param key A key string.
* @return The long value. @ if the key is not found or if the value cannot be converted to a
* long.
*/
public long getLong(String key)
{
Object o = get(key);
return o instanceof Number ? ((Number) o).longValue() : (long) getDouble(key);
}
/**
* Get the string associated with a key.
*
* @param key A key string.
* @return A string which is the value.
* @throws RuntimeException if the key is not found.
*/
public String getString(String key)
{
return get(key).toString();
}
/**
* Determine if the JSONObject contains a specific key.
*
* @param key A key string.
* @return true if the key exists in the JSONObject.
*/
public boolean has(String key)
{
return _properties.containsKey(key);
}
/**
* Determine if the value associated with the key is null or if there is no value.
*
* @param key A key string.
* @return true if there is no value associated with the key or if the value is the
* JSONObject.NULL object.
*/
public boolean isNull(String key)
{
return JSONObject.NULL.equals(opt(key));
}
/**
* Get an enumeration of the keys of the JSONObject. Caution: the set should not be modified.
*
* @return An iterator of the keys.
*/
public Set<String> keys()
{
return _properties.keySet();
}
/**
* Get the number of keys stored in the JSONObject.
*
* @return The number of keys in the JSONObject.
*/
public int length()
{
return _properties.size();
}
/**
* Produce a JSONArray containing the names of the elements of this JSONObject.
*
* @return A JSONArray containing the key strings, or null if the JSONObject is empty.
*/
public JSONArray names()
{
JSONArray ja = new JSONArray();
for (String key : keys())
{
ja.put(key);
}
return ja.length() == 0 ? null : ja;
}
/**
* Produce a string from a Number.
*
* @param n A Number
* @return A String. @ If n is a non-finite number.
*/
static String numberToString(Number n)
{
assert n != null;
testValidity(n);
// Shave off trailing zeros and decimal point, if possible.
String s = n.toString();
if (s.indexOf('.') > 0 && s.indexOf('e') < 0 && s.indexOf('E') < 0)
{
while (s.endsWith("0"))
{
s = s.substring(0, s.length() - 1);
}
if (s.endsWith("."))
{
s = s.substring(0, s.length() - 1);
}
}
return s;
}
/**
* Get an optional value associated with a key.
*
* @param key A key string.
* @return An object which is the value, or null if there is no value.
* @see #get(String)
*/
public Object opt(String key)
{
return _properties.get(key);
}
/**
* Put a key/value pair in the JSONObject. If the value is null, then the key will be removed
* from the JSONObject if it is present.
*
* @param key A key string.
* @param value An object which is the value. It should be of one of these types: Boolean, Double,
* Integer, JSONArray, JSONObject, Long, String, or the JSONObject.NULL object.
* @return this.
* @throws RuntimeException If the value is non-finite number or if the key is null.
*/
public JSONObject put(String key, Object value)
{
assert key != null;
if (value != null)
{
testValidity(value);
_properties.put(key, value);
}
else
{
remove(key);
}
return this;
}
/**
* Produce a string in double quotes with backslash sequences in all the right places. A
* backslash will be inserted within </, allowing JSON text to be delivered in HTML. In JSON
* text, a string cannot contain a control character or an unescaped quote or backslash.
*
* @param string A String
* @return A String correctly formatted for insertion in a JSON text.
*/
public static String quote(String string)
{
if (string == null || string.length() == 0)
{
return "\"\"";
}
char b;
char c = 0;
int i;
int len = string.length();
StringBuilder buffer = new StringBuilder(len + 4);
String t;
buffer.append('"');
for (i = 0; i < len; i += 1)
{
b = c;
c = string.charAt(i);
switch (c)
{
case '\\':
case '"':
buffer.append('\\');
buffer.append(c);
break;
case '/':
if (b == '<')
{
buffer.append('\\');
}
buffer.append(c);
break;
case '\b':
buffer.append("\\b");
break;
case '\t':
buffer.append("\\t");
break;
case '\n':
buffer.append("\\n");
break;
case '\f':
buffer.append("\\f");
break;
case '\r':
buffer.append("\\r");
break;
default:
if (c < ' ' || (c >= '\u0080' && c < '\u00a0')
|| (c >= '\u2000' && c < '\u2100'))
{
t = "000" + Integer.toHexString(c);
buffer.append("\\u" + t.substring(t.length() - 4));
}
else
{
buffer.append(c);
}
}
}
buffer.append('"');
return buffer.toString();
}
/**
* Remove a name and its value, if present.
*
* @param key The name to be removed.
* @return The value that was associated with the name, or null if there was no value.
*/
public Object remove(String key)
{
return _properties.remove(key);
}
private static final Class[] ALLOWED = new Class[]
{String.class, Boolean.class, Number.class, JSONObject.class, JSONArray.class, Null.class};
/**
* Throw an exception if the object is an NaN or infinite number, or not a type which may be
* stored.
*
* @param value The object to test. @ If o is a non-finite number.
*/
@SuppressWarnings("unchecked")
static void testValidity(Object value)
{
if (value == null) return;
boolean found = false;
Class actual = value.getClass();
for (Class allowed : ALLOWED)
{
if (allowed.isAssignableFrom(actual))
{
found = true;
break;
}
}
if (!found)
throw new RuntimeException(
String
.format(
"JSONObject properties may be String, Boolean, Number, JSONObject or JSONArray. Type %s is not allowed.",
actual.getName()));
if (value instanceof Double)
{
Double asDouble = (Double) value;
if (asDouble.isInfinite() || asDouble.isNaN())
{
throw new RuntimeException(
"JSON does not allow non-finite numbers.");
}
return;
}
if (value instanceof Float)
{
Float asFloat = (Float) value;
if (asFloat.isInfinite() || asFloat.isNaN())
{
throw new RuntimeException(
"JSON does not allow non-finite numbers.");
}
return;
}
}
/**
* Make a JSON text of this JSONObject. For compactness, no whitespace is added. If this would
* not result in a syntactically correct JSON text, then null will be returned instead.
* <p/>
* Warning: This method assumes that the data structure is acyclical.
*
* @return a printable, displayable, portable, transmittable representation of the object,
* beginning with <code>{</code> <small>(left brace)</small> and ending with
* <code>}</code> <small>(right brace)</small>.
*/
@Override
public String toString()
{
boolean comma = false;
StringBuilder buffer = new StringBuilder("{");
for (String key : keys())
{
if (comma) buffer.append(',');
buffer.append(quote(key.toString()));
buffer.append(':');
buffer.append(valueToString(_properties.get(key)));
comma = true;
}
buffer.append('}');
return buffer.toString();
}
/**
* Make a JSON text of an Object value. If the object has an value.toJSONString() method, then
* that method will be used to produce the JSON text. The method is required to produce a
* strictly conforming text. If the object does not contain a toJSONString method (which is the
* most common case), then a text will be produced by the rules.
* <p/>
* Warning: This method assumes that the data structure is acyclical.
*
* @param value The value to be serialized.
* @return a printable, displayable, transmittable representation of the object, beginning with
* <code>{</code> <small>(left brace)</small> and ending with <code>}</code> <small>(right
* brace)</small>. @ If the value is or contains an invalid number.
*/
static String valueToString(Object value)
{
if (value == null || value.equals(null))
{
return "null";
}
if (value instanceof JSONString)
{
try
{
String json = ((JSONString) value).toJSONString();
return quote(json);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
if (value instanceof Number)
{
return numberToString((Number) value);
}
if (value instanceof Boolean || value instanceof JSONObject || value instanceof JSONArray)
{
return value
.toString();
}
return quote(value.toString());
}
}
The table below shows all metrics for JSONObject.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 77.00 | Number of blocks | |
| BLOCK_COMMENT | 29.00 | Number of block comment lines | |
| COMMENTS | 339.00 | Comment lines | |
| COMMENT_DENSITY | 1.27 | Comment density | |
| COMPARISONS | 60.00 | Number of comparison operators | |
| CYCLOMATIC | 110.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 49.00 | Comments in declarations | |
| DOC_COMMENT | 289.00 | Number of javadoc comment lines | |
| ELOC | 266.00 | Effective lines of code | |
| EXEC_COMMENTS | 8.00 | Comments in executable code | |
| EXITS | 55.00 | Procedure exits | |
| FUNCTIONS | 31.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 1.00 | 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 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 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 | 2.00 | 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 | 9.00 | 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 | 1.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 1.00 | 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 | 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 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 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 | 1.00 | 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 | 1.00 | 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 | 2.00 | 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 | 1.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 1.00 | 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 | 1.00 | 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 | |
| JAVA0289 | 5.00 | null | |
| LINES | 867.00 | Number of lines in the source file | |
| LINE_COMMENT | 21.00 | Number of line comments | |
| LOC | 429.00 | Lines of code | |
| LOGICAL_LINES | 154.00 | Number of statements | |
| LOOPS | 4.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 716.00 | Number of operands | |
| OPERATORS | 1429.00 | Number of operators | |
| PARAMS | 28.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2145.00 | Halstead program length | |
| PROGRAM_VOCAB | 262.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 61.00 | Number of return points from functions | |
| SIZE | 27395.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 204.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 58.00 | Number of unique operators | |
| WHITESPACE | 99.00 | Number of whitespace lines | |