TemplateCache.java
| Index Score | ||
|---|---|---|
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freemarker.cache |
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FreeMarker |
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 | |
|---|---|---|
| SIZE | Size of the file in bytes |  |
| BLOCKS | Number of blocks | |
| CYCLOMATIC | Cyclomatic complexity | |
| JAVA0143 | JAVA0143 Synchronized method | |
| JAVA0123 | JAVA0123 Use all three components of for loop | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| LOC | Lines of code | |
| COMPARISONS | Number of comparison operators | |
| PARAMS | Number of formal parameter declarations | |
| RETURNS | Number of return points from functions | |
| LOGICAL_LINES | Number of statements | |
| EXITS | Procedure exits | |
| LINES | Number of lines in the source file | |
| ELOC | Effective lines of code | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| UNIQUE_OPERANDS | Number of unique operands | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERANDS | Number of operands | |
| OPERATORS | Number of operators | |
| COMMENTS | Comment lines | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| LINE_COMMENT | Number of line comments | |
| DOC_COMMENT | Number of javadoc comment lines | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0163 | JAVA0163 Empty statement | |
| JAVA0150 | JAVA0150 java.lang.Error (or subclass) thrown | |
| DECL_COMMENTS | Comments in declarations | |
| LOOPS | Number of loops | |
| JAVA0166 | JAVA0166 Generic exception caught | |
| PROGRAM_VOLUME | Halstead program volume | |
| FUNCTIONS | Number of function declarations | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0075 | JAVA0075 Method parameter hides field | |
| WHITESPACE | Number of whitespace lines | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
/*
* Copyright (c) 2003 The Visigoth Software Society. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowledgement:
* "This product includes software developed by the
* Visigoth Software Society (http://www.visigoths.org/)."
* Alternately, this acknowledgement may appear in the software itself,
* if and wherever such third-party acknowledgements normally appear.
*
* 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
* project contributors may be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact visigoths@visigoths.org.
*
* 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
* nor may "FreeMarker" or "Visigoth" appear in their names
* without prior written permission of the Visigoth Software Society.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Visigoth Software Society. For more
* information on the Visigoth Software Society, please see
* http://www.visigoths.org/
*/
package freemarker.cache;
import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
import java.io.StringWriter;
import java.lang.reflect.UndeclaredThrowableException;
import java.security.CodeSource;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.StringTokenizer;
import freemarker.core.Environment;
import freemarker.log.Logger;
import freemarker.template.Configuration;
import freemarker.template.Template;
/**
* A class that performs caching and on-demand loading of the templates.
* The actual loading is delegated to a {@link TemplateLoader}. Also,
* various constructors provide you with convenient caches with predefined
* behavior. Typically you don't use this class directly - in normal
* circumstances it is hidden behind a {@link Configuration}.
* @author Attila Szegedi, szegedia at freemail dot hu
* @version $Id: TemplateCache.java,v 1.62 2004/03/17 01:14:33 ddekany Exp $
*/
public class TemplateCache
{
private static final String ASTERISKSTR = "*";
private static final String LOCALE_SEPARATOR = "_";
private static final char ASTERISK = '*';
private static final String CURRENT_DIR_PATH_PREFIX = "./";
private static final String CURRENT_DIR_PATH = "/./";
private static final String PARENT_DIR_PATH_PREFIX = "../";
private static final String PARENT_DIR_PATH = "/../";
private static final char SLASH = '/';
private static final Logger logger = Logger.getLogger("freemarker.cache");
private final TemplateLoader mainLoader;
/** Here we keep our cached templates */
private final CacheStorage storage;
private final boolean isStorageConcurrent;
/** The default refresh delay in milliseconds. */
private long delay = 5000;
/** Specifies if localized template lookup is enabled or not */
private boolean localizedLookup = true;
private Configuration config;
/**
* Returns a template cache that will first try to load a template from
* the file system relative to the current user directory (i.e. the value
* of the system property <code>user.dir</code>), then from the classpath.
* This default template cache suits many applications.
*/
public TemplateCache()
{
this(createDefaultTemplateLoader());
}
private static TemplateLoader createDefaultTemplateLoader() {
try {
return new FileTemplateLoader();
} catch(Exception e) {
logger.warn("Could not create a file template loader for current directory", e);
return null;
}
}
/**
* Creates a new template cache with a custom template loader that is used
* to load the templates.
* @param loader the template loader to use.
*/
public TemplateCache(TemplateLoader loader)
{
this(loader, new SoftCacheStorage());
}
/**
* Creates a new template cache with a custom template loader and cache
* storage that are used to load and store the templates.
* @param loader the template loader to use.
* @param storage the cache storage to use
*/
public TemplateCache(TemplateLoader loader, CacheStorage storage)
{
this.mainLoader = loader;
this.storage = storage;
if(storage == null)
{
throw new IllegalArgumentException("storage == null");
}
isStorageConcurrent = storage instanceof ConcurrentCacheStorage &&
((ConcurrentCacheStorage)storage).isConcurrent();
}
/**
* Sets the configuration object to which this cache belongs. This method
* is called by the configuration itself to establish the relation, and
* should not be called by users.
* @param config the configuration that this cache belongs to
*/
public void setConfiguration(Configuration config)
{
this.config = config;
clear();
}
/**
* Returns the template loader used by this cache.
* @return the template loader used by this cache.
*/
public TemplateLoader getTemplateLoader() {
return mainLoader;
}
/**
* Returns the cache storage used by this cache.
* @return the cache storage used by this cache.
*/
public CacheStorage getCacheStorage() {
return storage;
}
/**
* Loads a template with the given name, in the specified locale and
* using the specified character encoding.
*
* @param name the name of the template. Can't be null. The exact syntax of the name
* is interpreted by the underlying {@link TemplateLoader}, but the
* cache makes some assumptions. First, the name is expected to be
* a hierarchical path, with path components separated by a slash
* character (not with backslash!). The path (the name) must <em>not</em> begin with slash;
* the path is always relative to the "template root directory".
* Then, the <tt>..</tt> and <tt>.</tt> path metaelements will be resolved.
* For example, if the name is <tt>a/../b/./c.ftl</tt>, then it will be
* simplified to <tt>b/c.ftl</tt>. The rules regarding this are same as with conventional
* UN*X paths. The path must not reach outside the template root directory, that is,
* it can't be something like <tt>"../templates/my.ftl"</tt> (not even if the pervious path
* happens to be equivalent with <tt>"/my.ftl"</tt>).
* Further, the path is allowed to contain at most
* one path element whose name is <tt>*</tt> (asterisk). This path metaelement triggers the
* <i>acquisition mechanism</i>. If the template is not found in
* the location described by the concatenation of the path left to the
* asterisk (called base path) and the part to the right of the asterisk
* (called resource path), the cache will attempt to remove the rightmost
* path component from the base path ("go up one directory") and concatenate
* that with the resource path. The process is repeated until either a
* template is found, or the base path is completely exhausted.
*
* @param locale the requested locale of the template. Can't be null.
* Assuming you have specified <code>en_US</code> as the locale and
* <code>myTemplate.html</code> as the name of the template, the cache will
* first try to retrieve <code>myTemplate_en_US.html</code>, then
* <code>myTemplate_en.html</code>, and finally
* <code>myTemplate.html</code>.
*
* @param encoding the character encoding used to interpret the template
* source bytes. Can't be null.
*
* @param parse if true, the loaded template is parsed and interpreted
* as a regular FreeMarker template. If false, the loaded template is
* treated as an unparsed block of text.
*
* @return the loaded template, or null if the template is not found.
* @throws IOException if an I/O exception occurs while loading the
* template
*/
public Template getTemplate(String name, Locale locale, String encoding, boolean parse)
throws IOException
{
if (name == null) {
throw new IllegalArgumentException("Argument \"name\" can't be null");
}
if (locale == null) {
throw new IllegalArgumentException("Argument \"locale\" can't be null");
}
if (encoding == null) {
throw new IllegalArgumentException("Argument \"encoding\" can't be null");
}
name = normalizeName(name);
if(name == null) {
return null;
}
Template result = null;
if (mainLoader != null) {
result = getTemplate(mainLoader, name, locale, encoding, parse);
}
return result;
}
private Template getTemplate(TemplateLoader loader, String name, Locale locale, String encoding, boolean parse)
throws IOException
{
boolean debug = logger.isDebugEnabled();
String debugName = debug ? name + "[" + locale + "," + encoding + (parse ? ",parsed] " : ",unparsed] ") : null;
TemplateKey tk = new TemplateKey(name, locale, encoding, parse);
CachedTemplate cachedTemplate;
if(isStorageConcurrent) {
cachedTemplate = (CachedTemplate)storage.get(tk);
}
else {
synchronized(storage) {
cachedTemplate = (CachedTemplate)storage.get(tk);
}
}
long now = System.currentTimeMillis();
long lastModified = -1L;
Object newlyFoundSource = null;
boolean rethrown = false;
try {
if (cachedTemplate != null) {
// If we're within the refresh delay, return the cached copy
if (now - cachedTemplate.lastChecked < delay) {
if(debug) {
logger.debug(debugName + "cached copy not yet stale; using cached.");
}
// Can be null, indicating a cached negative lookup
Object t = cachedTemplate.templateOrException;
if(t instanceof Template || t == null) {
return (Template)t;
}
else if(t instanceof RuntimeException) {
throwLoadFailedException((RuntimeException)t);
}
else if(t instanceof IOException) {
rethrown = true;
throwLoadFailedException((IOException)t);
}
throw new AssertionError("t is " + t.getClass().getName());
}
// Clone as the instance bound to the map should be treated as
// immutable to ensure proper concurrent semantics
cachedTemplate = cachedTemplate.cloneCachedTemplate();
// Update the last-checked flag
cachedTemplate.lastChecked = now;
// Find the template source
newlyFoundSource = findTemplateSource(name, locale);
// Template source was removed
if (newlyFoundSource == null) {
if(debug) {
logger.debug(debugName + "no source found.");
}
storeNegativeLookup(tk, cachedTemplate, null);
return null;
}
// If the source didn't change and its last modified date
// also didn't change, return the cached version.
lastModified = loader.getLastModified(newlyFoundSource);
boolean lastModifiedNotChanged = lastModified == cachedTemplate.lastModified;
boolean sourceEquals = newlyFoundSource.equals(cachedTemplate.source);
if(lastModifiedNotChanged && sourceEquals) {
if(debug) {
logger.debug(debugName + "using cached since " +
newlyFoundSource + " didn't change.");
}
storeCached(tk, cachedTemplate);
return (Template)cachedTemplate.templateOrException;
}
else {
if(debug && !sourceEquals) {
logger.debug("Updating source, info for cause: " +
"sourceEquals=" + sourceEquals +
", newlyFoundSource=" + newlyFoundSource +
", cachedTemplate.source=" + cachedTemplate.source);
}
if(debug && !lastModifiedNotChanged) {
logger.debug("Updating source, info for cause: " +
"lastModifiedNotChanged=" + lastModifiedNotChanged +
", cache lastModified=" + cachedTemplate.lastModified +
" != file lastModified=" + lastModified);
}
// Update the source
cachedTemplate.source = newlyFoundSource;
}
}
else {
if(debug) {
logger.debug("Could not find template in cache, "
+ "creating new one; id=[" +
tk.name + "[" + tk.locale + "," + tk.encoding +
(tk.parse ? ",parsed] " : ",unparsed] ") + "]");
}
// Construct a new CachedTemplate entry. Note we set the
// cachedTemplate.lastModified to Long.MIN_VALUE. This is
// a flag that signs it has to be explicitly queried later on.
cachedTemplate = new CachedTemplate();
cachedTemplate.lastChecked = now;
newlyFoundSource = findTemplateSource(name, locale);
if (newlyFoundSource == null) {
storeNegativeLookup(tk, cachedTemplate, null);
return null;
}
cachedTemplate.source = newlyFoundSource;
cachedTemplate.lastModified = lastModified = Long.MIN_VALUE;
}
if(debug) {
logger.debug("Compiling FreeMarker template " +
debugName + " from " + newlyFoundSource);
}
// If we get here, then we need to (re)load the template
Object source = cachedTemplate.source;
Template t =
loadTemplate(loader, name, locale, encoding, parse, source);
cachedTemplate.templateOrException = t;
cachedTemplate.lastModified =
lastModified == Long.MIN_VALUE
? loader.getLastModified(source)
: lastModified;
storeCached(tk, cachedTemplate);
return t;
}
catch(RuntimeException e) {
storeNegativeLookup(tk, cachedTemplate, e);
throw e;
}
catch(IOException e) {
if(!rethrown) {
storeNegativeLookup(tk, cachedTemplate, e);
}
throw e;
}
finally {
if(newlyFoundSource != null) {
loader.closeTemplateSource(newlyFoundSource);
}
}
}
private void throwLoadFailedException(Exception e) throws IOException {
IOException ioe = new IOException("There was an error loading the " +
"template on an earlier attempt; it is attached as a cause");
ioe.initCause(e);
throw ioe;
}
private void storeNegativeLookup(TemplateKey tk,
CachedTemplate cachedTemplate, Exception e) {
cachedTemplate.templateOrException = e;
cachedTemplate.source = null;
cachedTemplate.lastModified = 0L;
storeCached(tk, cachedTemplate);
}
private void storeCached(TemplateKey tk, CachedTemplate cachedTemplate) {
if(isStorageConcurrent) {
storage.put(tk, cachedTemplate);
}
else {
synchronized(storage) {
storage.put(tk, cachedTemplate);
}
}
}
private Template loadTemplate(TemplateLoader loader, String name,
Locale locale, String encoding, boolean parse, Object source)
throws IOException
{
Template template;
CodeSource codeSource;
if(config.isSecure() && loader instanceof SecureTemplateLoader) {
codeSource = ((SecureTemplateLoader)loader).getCodeSource(source);
} else {
codeSource = null;
}
Reader reader = loader.getReader(source, encoding);
try {
if(parse) {
try {
template = createTemplate(name, reader, config, encoding, codeSource);
}
catch (Template.WrongEncodingException wee) {
encoding = wee.specifiedEncoding;
reader = loader.getReader(source, encoding);
template = createTemplate(name, reader, config, encoding, codeSource);
}
template.setLocale(locale);
}
else {
// Read the contents into a StringWriter, then construct a single-textblock
// template from it.
StringWriter sw = new StringWriter();
char[] buf = new char[4096];
for(;;) {
int charsRead = reader.read(buf);
if (charsRead > 0) {
sw.write(buf, 0, charsRead);
}
else if(charsRead == -1) {
break;
}
}
template = Template.getPlainTextTemplate(name, sw.toString(), config);
template.setLocale(locale);
}
template.setEncoding(encoding);
}
finally {
reader.close();
}
return template;
}
/**
* Gets the delay in milliseconds between checking for newer versions of a
* template source.
* @return the current value of the delay
*/
public synchronized long getDelay()
{
return delay;
}
/**
* Sets the delay in milliseconds between checking for newer versions of a
* template sources.
* @param delay the new value of the delay
*/
public synchronized void setDelay(long delay)
{
this.delay = delay;
}
/**
* Returns if localized template lookup is enabled or not.
* @return true if localized template lookup is enabled, false otherwise.
*/
public synchronized boolean getLocalizedLookup()
{
return localizedLookup;
}
/**
* Sets whether to enable localized template lookup or not.
* @param localizedLookup true to enable localized template lookup, false
* to disable it.
*/
public synchronized void setLocalizedLookup(boolean localizedLookup)
{
this.localizedLookup = localizedLookup;
}
/**
* Removes all entries from the cache, forcing reloading of templates
* on subsequent {@link #getTemplate(String, Locale, String, boolean)}
* calls.
*/
public void clear()
{
synchronized (storage) {
storage.clear();
if(mainLoader instanceof StatefulTemplateLoader) {
((StatefulTemplateLoader)mainLoader).resetState();
}
}
}
/**
* Resolves a relative template path to absolute template path for purposes
* of an inclusion via the include directive. Can only be invoked during
* template processing.
* @param env the Environment associated with the current thread.
* @param parentTemplateDir the absolute directory path of the template
* containing the include directive.
* @param templateNameString the potentially relative path specified in the
* include directive.
* @return the absolute path resolved against the specified parent
* directory.
*/
public static String getFullTemplatePath(Environment env, String parentTemplateDir, String templateNameString)
{
if (templateNameString.indexOf("://") >0) {
;
}
else if (templateNameString.length() > 0 && templateNameString.charAt(0) == '/') {
int protIndex = parentTemplateDir.indexOf("://");
if (protIndex >0) {
templateNameString = parentTemplateDir.substring(0, protIndex + 2) + templateNameString;
} else {
templateNameString = templateNameString.substring(1);
}
}
else {
templateNameString = parentTemplateDir + templateNameString;
}
return templateNameString;
}
private Object findTemplateSource(String name, Locale locale)
throws
IOException
{
if (getLocalizedLookup()) {
int lastDot = name.lastIndexOf('.');
String prefix = lastDot == -1 ? name : name.substring(0, lastDot);
String suffix = lastDot == -1 ? "" : name.substring(lastDot);
String localeName = LOCALE_SEPARATOR + locale.toString();
StringBuilder buf = new StringBuilder(name.length() + localeName.length());
buf.append(prefix);
for (;;) {
buf.setLength(prefix.length());
String path = buf.append(localeName).append(suffix).toString();
Object templateSource = acquireTemplateSource(path);
if (templateSource != null) {
return templateSource;
}
int lastUnderscore = localeName.lastIndexOf('_');
if (lastUnderscore == -1) {
break;
}
localeName = localeName.substring(0, lastUnderscore);
}
return null;
}
else {
return acquireTemplateSource(name);
}
}
private Object acquireTemplateSource(String path) throws IOException
{
int asterisk = path.indexOf(ASTERISK);
// Shortcut in case there is no acquisition
if(asterisk == -1) {
return mainLoader.findTemplateSource(path);
}
StringTokenizer tok = new StringTokenizer(path, "/");
int lastAsterisk = -1;
List<String> tokpath = new ArrayList<String>();
while(tok.hasMoreTokens()) {
String pathToken = tok.nextToken();
if(pathToken.equals(ASTERISKSTR)) {
if(lastAsterisk != -1) {
tokpath.remove(lastAsterisk);
}
lastAsterisk = tokpath.size();
}
tokpath.add(pathToken);
}
String basePath = concatPath(tokpath, 0, lastAsterisk);
String resourcePath = concatPath(tokpath, lastAsterisk + 1,
tokpath.size());
if(resourcePath.endsWith("/")) {
resourcePath = resourcePath.substring(0, resourcePath.length() - 1);
}
StringBuilder buf = new StringBuilder(path.length()).append(basePath);
int l = basePath.length();
boolean debug = logger.isDebugEnabled();
for(;;) {
String fullPath = buf.append(resourcePath).toString();
if(debug) {
logger.debug("Trying to find template source " + fullPath);
}
Object templateSource = mainLoader.findTemplateSource(fullPath);
if(templateSource != null) {
return templateSource;
}
if(l == 0) {
return null;
}
l = basePath.lastIndexOf(SLASH, l - 2) + 1;
buf.setLength(l);
}
}
private static String concatPath(List path, int from, int to)
{
StringBuilder buf = new StringBuilder((to - from) * 16);
for(int i = from; i < to; ++i) {
buf.append(path.get(i)).append('/');
}
return buf.toString();
}
protected Template createTemplate(String name, Reader reader, Configuration config, String encoding, CodeSource codeSource) throws IOException {
return new Template(name, reader, config, encoding, codeSource);
}
private static String normalizeName(String name) {
if (name.indexOf("://") >0) {
return name;
}
for(;;) {
int parentDirPathLoc = name.indexOf(PARENT_DIR_PATH);
if(parentDirPathLoc == 0) {
// If it starts with /../, then it reaches outside the template
// root.
return null;
}
if(parentDirPathLoc == -1) {
if(name.startsWith(PARENT_DIR_PATH_PREFIX)) {
// Another attempt to reach out of template root.
return null;
}
break;
}
int previousSlashLoc = name.lastIndexOf(SLASH, parentDirPathLoc - 1);
name = name.substring(0, previousSlashLoc + 1) +
name.substring(parentDirPathLoc + PARENT_DIR_PATH.length());
}
for(;;) {
int currentDirPathLoc = name.indexOf(CURRENT_DIR_PATH);
if(currentDirPathLoc == -1) {
if(name.startsWith(CURRENT_DIR_PATH_PREFIX)) {
name = name.substring(CURRENT_DIR_PATH_PREFIX.length());
}
break;
}
name = name.substring(0, currentDirPathLoc) +
name.substring(currentDirPathLoc + CURRENT_DIR_PATH.length() - 1);
}
// Editing can leave us with a leading slash; strip it.
if(name.length() > 1 && name.charAt(0) == SLASH) {
name = name.substring(1);
}
return name;
}
/**
* This class holds a (name, locale) pair and is used as the key in
* the cached templates map.
*/
private static final class TemplateKey
{
private final String name;
private final Locale locale;
private final String encoding;
private final boolean parse;
TemplateKey(String name, Locale locale, String encoding, boolean parse)
{
this.name = name;
this.locale = locale;
this.encoding = encoding;
this.parse = parse;
}
public boolean equals(Object o)
{
if (o instanceof TemplateKey) {
TemplateKey tk = (TemplateKey)o;
return
parse == tk.parse &&
name.equals(tk.name) &&
locale.equals(tk.locale) &&
encoding.equals(tk.encoding);
}
return false;
}
public int hashCode()
{
return
name.hashCode() ^
locale.hashCode() ^
encoding.hashCode() ^
(parse ? Boolean.FALSE : Boolean.TRUE).hashCode();
}
}
/**
* This class holds the cached template and associated information
* (the source object, and the last-checked and last-modified timestamps).
* It is used as the value in the cached templates map. Note: this class
* is Serializable to allow custom 3rd party CacheStorage implementations
* to serialize/replicate them; FreeMarker code itself doesn't rely on its
* serializability.
*/
private static final class CachedTemplate implements Cloneable, Serializable
{
private static final long serialVersionUID = 1L;
Object templateOrException;
Object source;
long lastChecked;
long lastModified;
public CachedTemplate cloneCachedTemplate() {
try {
return (CachedTemplate)super.clone();
}
catch(CloneNotSupportedException e) {
throw new UndeclaredThrowableException(e);
}
}
}
}
The table below shows all metrics for TemplateCache.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 110.00 | Number of blocks | |
| BLOCK_COMMENT | 51.00 | Number of block comment lines | |
| COMMENTS | 207.00 | Comment lines | |
| COMMENT_DENSITY | 0.57 | Comment density | |
| COMPARISONS | 67.00 | Number of comparison operators | |
| CYCLOMATIC | 109.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 20.00 | Comments in declarations | |
| DOC_COMMENT | 135.00 | Number of javadoc comment lines | |
| ELOC | 365.00 | Effective lines of code | |
| EXEC_COMMENTS | 15.00 | Comments in executable code | |
| EXITS | 68.00 | Procedure exits | |
| FUNCTIONS | 28.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 93.34 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 107.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 1.00 | 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 | 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 | 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 | 1.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 1.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 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 | 2.00 | 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 | 5.00 | 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 | 1.00 | 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 | 1.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 1.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 4.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 1.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 2.00 | 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 | 1.00 | 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 | 1.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 3.00 | 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 | 1.00 | 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 | 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 | 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 | 748.00 | Number of lines in the source file | |
| LINE_COMMENT | 21.00 | Number of line comments | |
| LOC | 498.00 | Lines of code | |
| LOGICAL_LINES | 229.00 | Number of statements | |
| LOOPS | 7.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 1012.00 | Number of operands | |
| OPERATORS | 1862.00 | Number of operators | |
| PARAMS | 47.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2874.00 | Halstead program length | |
| PROGRAM_VOCAB | 366.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 60.00 | Number of return points from functions | |
| SIZE | 29757.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 309.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 57.00 | Number of unique operators | |
| WHITESPACE | 43.00 | Number of whitespace lines | |