public class Velocity extends Object implements RuntimeConstants
RuntimeConstants.SpaceGobbling
CHECK_EMPTY_OBJECTS, CONTEXT_AUTOREFERENCE_KEY, CONTEXT_SCOPE_CONTROL, CONVERSION_HANDLER_CLASS, CONVERSION_HANDLER_INSTANCE, CUSTOM_DIRECTIVES, DEFAULT_PARSER_CLASS, DEFAULT_RUNTIME_DIRECTIVES, DEFAULT_RUNTIME_LOG_NAME, DEFAULT_RUNTIME_PROPERTIES, DEFINE_DIRECTIVE_MAXDEPTH, DS_RESOURCE_LOADER_DATASOURCE, DS_RESOURCE_LOADER_KEY_COLUMN, DS_RESOURCE_LOADER_TABLE, DS_RESOURCE_LOADER_TEMPLATE_COLUMN, DS_RESOURCE_LOADER_TIMESTAMP_COLUMN, ENCODING_DEFAULT, ERRORMSG_END, ERRORMSG_START, EVENTHANDLER_INCLUDE, EVENTHANDLER_INVALIDREFERENCES, EVENTHANDLER_INVALIDREFERENCES_NULL, EVENTHANDLER_INVALIDREFERENCES_QUIET, EVENTHANDLER_INVALIDREFERENCES_TESTED, EVENTHANDLER_METHODEXCEPTION, EVENTHANDLER_REFERENCEINSERTION, FILE_RESOURCE_LOADER_CACHE, FILE_RESOURCE_LOADER_PATH, INPUT_ENCODING, INTERPOLATE_STRINGLITERALS, INTROSPECTOR_RESTRICT_CLASSES, INTROSPECTOR_RESTRICT_PACKAGES, MAX_NUMBER_LOOPS, NUMBER_OF_PARSERS, PARSE_DIRECTIVE_MAXDEPTH, PARSER_CLASS, PARSER_HYPHEN_ALLOWED, PARSER_POOL_CLASS, PARSER_POOL_SIZE, PROVIDE_SCOPE_CONTROL, RESOURCE_LOADER, RESOURCE_LOADER_CACHE, RESOURCE_LOADER_CHECK_INTERVAL, RESOURCE_LOADER_CLASS, RESOURCE_LOADER_IDENTIFIER, RESOURCE_LOADER_INSTANCE, RESOURCE_LOADER_PATHS, RESOURCE_LOADERS, RESOURCE_MANAGER_CACHE_CLASS, RESOURCE_MANAGER_CLASS, RESOURCE_MANAGER_DEFAULTCACHE_SIZE, RESOURCE_MANAGER_INSTANCE, RESOURCE_MANAGER_LOGWHENFOUND, RUNTIME_LOG_INSTANCE, RUNTIME_LOG_METHOD_CALL_LOG_INVALID, RUNTIME_LOG_NAME, RUNTIME_LOG_REFERENCE_LOG_INVALID, RUNTIME_LOG_TRACK_LOCATION, RUNTIME_REFERENCES_STRICT, RUNTIME_REFERENCES_STRICT_ESCAPE, RUNTIME_STRING_INTERNING, SKIP_INVALID_ITERATOR, SPACE_GOBBLING, STRICT_MATH, UBERSPECT_CLASSNAME, VM_ARGUMENTS_STRICT, VM_BODY_REFERENCE, VM_ENABLE_BC_MODE, VM_LIBRARY, VM_LIBRARY_AUTORELOAD, VM_LIBRARY_DEFAULT, VM_MAX_DEPTH, VM_MESSAGES_ON, VM_PERM_ALLOW_INLINE, VM_PERM_ALLOW_INLINE_REPLACE_GLOBAL, VM_PERM_INLINE_LOCAL
OLD_CHECK_EMPTY_OBJECTS, OLD_CONTEXT_AUTOREFERENCE_KEY, OLD_CONVERSION_HANDLER_CLASS, OLD_CUSTOM_DIRECTIVES, OLD_DEFINE_DIRECTIVE_MAXDEPTH, OLD_DS_RESOURCE_LOADER_DATASOURCE, OLD_DS_RESOURCE_LOADER_KEY_COLUMN, OLD_DS_RESOURCE_LOADER_TEMPLATE_COLUMN, OLD_DS_RESOURCE_LOADER_TIMESTAMP_COLUMN, OLD_ERRORMSG_END, OLD_ERRORMSG_START, OLD_EVENTHANDLER_INCLUDE, OLD_EVENTHANDLER_INVALIDREFERENCES, OLD_EVENTHANDLER_METHODEXCEPTION, OLD_EVENTHANDLER_REFERENCEINSERTION, OLD_FILE_RESOURCE_LOADER_CACHE, OLD_FILE_RESOURCE_LOADER_PATH, OLD_INPUT_ENCODING, OLD_INTERPOLATE_STRINGLITERALS, OLD_MAX_NUMBER_LOOPS, OLD_PARSE_DIRECTIVE_MAXDEPTH, OLD_RESOURCE_LOADER_CHECK_INTERVAL, OLD_RESOURCE_LOADERS, OLD_RESOURCE_MANAGER_DEFAULTCACHE_SIZE, OLD_RESOURCE_MANAGER_LOGWHENFOUND, OLD_RUNTIME_LOG_REFERENCE_LOG_INVALID, OLD_RUNTIME_REFERENCES_STRICT, OLD_RUNTIME_REFERENCES_STRICT_ESCAPE, OLD_SKIP_INVALID_ITERATOR, OLD_SPACE_GOBBLING, OLD_STRICT_MATH, OLD_UBERSPECT_CLASSNAME, OLD_VM_BODY_REFERENCE, OLD_VM_ENABLE_BC_MODE, OLD_VM_LIBRARY, OLD_VM_LIBRARY_DEFAULT, OLD_VM_MAX_DEPTH, OLD_VM_PERM_ALLOW_INLINE, OLD_VM_PERM_ALLOW_INLINE_REPLACE_GLOBAL, OLD_VM_PERM_INLINE_LOCAL
Constructor and Description |
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Velocity() |
Modifier and Type | Method and Description |
---|---|
static void |
addProperty(String key,
Object value)
Add a Velocity Runtime property.
|
static void |
clearProperty(String key)
Clear a Velocity Runtime property.
|
static boolean |
evaluate(Context context,
Writer writer,
String logTag,
Reader reader)
Renders the input reader using the context into the output writer.
|
static boolean |
evaluate(Context context,
Writer out,
String logTag,
String instring)
renders the input string using the context into the output writer.
|
static org.slf4j.Logger |
getLog()
Returns the current logger.
|
static Object |
getProperty(String key)
Get a Velocity Runtime property.
|
static Template |
getTemplate(String name)
Returns a
Template from the Velocity
resource management system. |
static Template |
getTemplate(String name,
String encoding)
Returns a
Template from the Velocity
resource management system. |
static void |
init()
initialize the Velocity runtime engine, using the default
properties of the Velocity distribution
|
static void |
init(Properties p)
initialize the Velocity runtime engine, using default properties
plus the properties in the passed in java.util.Properties object
|
static void |
init(String propsFilename)
initialize the Velocity runtime engine, using default properties
plus the properties in the properties file passed in as the arg
|
static boolean |
invokeVelocimacro(String vmName,
String logTag,
String[] params,
Context context,
Writer writer)
Invokes a currently registered Velocimacro with the params provided
and places the rendered stream into the writer.
|
void |
loadDirective(String directiveClass)
Instantiates and loads the directive with some basic checks.
|
static boolean |
mergeTemplate(String templateName,
String encoding,
Context context,
Writer writer)
Merges a template and puts the rendered stream into the writer
|
void |
removeDirective(String name)
Remove a directive.
|
static void |
reset()
Resets the instance, so Velocity can be re-initialized again.
|
static boolean |
resourceExists(String resourceName)
Determines whether a resource is accessible via the
currently configured resource loaders.
|
static void |
setApplicationAttribute(Object key,
Object value)
Set the an ApplicationAttribue, which is an Object
set by the application which is accessible from
any component of the system that gets a RuntimeServices.
|
static void |
setProperties(Properties configuration)
Set an entire configuration at once.
|
static void |
setProperty(String key,
Object value)
Set a Velocity Runtime property.
|
public static void init()
public static void reset()
public static void init(String propsFilename)
propsFilename
- file containing properties to use to initialize
the Velocity runtimepublic static void init(Properties p)
p
- Properties object containing initialization propertiespublic static void setProperty(String key, Object value)
key
- The property key.value
- The property value.public static void addProperty(String key, Object value)
key
- The property key.value
- The property value.public static void clearProperty(String key)
key
- of property to clearpublic static void setProperties(Properties configuration)
configuration
- A configuration object.public static Object getProperty(String key)
key
- property to retrievepublic static boolean evaluate(Context context, Writer out, String logTag, String instring) throws ParseErrorException, MethodInvocationException, ResourceNotFoundException
context
- context to use in rendering input stringout
- Writer in which to render the outputlogTag
- string to be used as the template name for log
messages in case of errorinstring
- input string containing the VTL to be renderedParseErrorException
- The template could not be parsed.MethodInvocationException
- A method on a context object could not be invoked.ResourceNotFoundException
- A referenced resource could not be loaded.public static boolean evaluate(Context context, Writer writer, String logTag, Reader reader) throws ParseErrorException, MethodInvocationException, ResourceNotFoundException
context
- context to use in rendering input stringwriter
- Writer in which to render the outputlogTag
- string to be used as the template name for log messages
in case of errorreader
- Reader containing the VTL to be renderedParseErrorException
- The template could not be parsed.MethodInvocationException
- A method on a context object could not be invoked.ResourceNotFoundException
- A referenced resource could not be loaded.public static boolean invokeVelocimacro(String vmName, String logTag, String[] params, Context context, Writer writer)
vmName
- name of Velocimacro to calllogTag
- string to be used for template name in case of error. if null,
the vmName will be usedparams
- keys for args used to invoke Velocimacro, in java format
rather than VTL (eg "foo" or "bar" rather than "$foo" or "$bar")context
- Context object containing data/objects used for rendering.writer
- Writer for output streampublic static boolean mergeTemplate(String templateName, String encoding, Context context, Writer writer) throws ResourceNotFoundException, ParseErrorException, MethodInvocationException
templateName
- name of template to be used in mergeencoding
- encoding used in templatecontext
- filled context to be used in mergewriter
- writer to write template intoParseErrorException
- The template could not be parsed.MethodInvocationException
- A method on a context object could not be invoked.ResourceNotFoundException
- A referenced resource could not be loaded.public static Template getTemplate(String name) throws ResourceNotFoundException, ParseErrorException
Template
from the Velocity
resource management system.name
- The file name of the desired template.ResourceNotFoundException
- if template not found
from any available source.ParseErrorException
- if template cannot be parsed due
to syntax (or other) error.public static Template getTemplate(String name, String encoding) throws ResourceNotFoundException, ParseErrorException
Template
from the Velocity
resource management system.name
- The file name of the desired template.encoding
- The character encoding to use for the template.ResourceNotFoundException
- if template not found
from any available source.ParseErrorException
- if template cannot be parsed due
to syntax (or other) error.public static boolean resourceExists(String resourceName)
Determines whether a resource is accessible via the
currently configured resource loaders. Resource
is the generic
description of templates, static content, etc.
Note that the current implementation will not change the state of the system in any real way - so this cannot be used to pre-load the resource cache, as the previous implementation did as a side-effect.
resourceName
- The name of the resource to search for.public static org.slf4j.Logger getLog()
public static void setApplicationAttribute(Object key, Object value)
Set the an ApplicationAttribue, which is an Object set by the application which is accessible from any component of the system that gets a RuntimeServices. This allows communication between the application environment and custom pluggable components of the Velocity engine, such as loaders and loggers.
Note that there is no enforcement or rules for the key used - it is up to the application developer. However, to help make the intermixing of components possible, using the target Class name (e.g. com.foo.bar ) as the key might help avoid collision.
key
- object 'name' under which the object is storedvalue
- object to store under this keypublic void removeDirective(String name)
name
- name of the directive.public void loadDirective(String directiveClass)
directiveClass
- classname of directive to loadCopyright © 2000–2020 The Apache Software Foundation. All rights reserved.