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This specifies the fully-qualified name of the class of the object from which the actual print data comes, as returned by the Class. Thus the class name for byte is “[B”for char it is “[C”. A DocPrintJob obtains its print data by means of interface Doc. A Doc object lets the Docfavor determine the doc flavor the client can supply. A Jqva object also lets the DocPrintJob obtain an instance of the doc flavor’s representation class, from which the DocPrintJob then obtains the actual print data.
Client Formatted Print Data There are two broad categories of print data, client formatted print data and service formatted print data.
Java Examples for javax.print.DocFlavor
For client formatted print datathe client determines or knows the print data format. For example the client docfoavor have a JPEG encoded image, a URL for HTML code, or a disk file containing plain text in some encoding, possibly jsva from an external source, and requires a way to doclavor the data format to the print service. The doc flavor’s representation class is a conduit for the JPS DocPrintJob to obtain a javz of characters or bytes from the client.
The doc flavor’s MIME type is one of the standard media types telling how to interpret the sequence of characters or bytes. Interface Doc provides two utility operations, getReaderForText and docflavkrto help a Doc object’s client extract client formatted print data. For client formatted print data, the print data representation class is typically one of the following although other representation classes are permitted: Character array char — The print data consists of the Unicde characters in the array.
String — The print data consists of the Unicode characters in the string. Reader — The print data consists of javaa Unicode characters read from the stream up to the end-of-stream. Byte array byte — The print data consists of the bytes in the array.
The bytes are encoded in the character set specified by the doc flavor’s MIME type. InputStream — The print data consists of the bytes read from the stream up to the end-of-stream.
When the javx class is a URL, the print service itself accesses and downloads the document directly from its URL address, without involving the client. The service may be some form of network print service which is executing in a different environment. This means you should not use a URL print data flavor to print a document at a restricted URL that the client can see but the printer cannot see.
This also means you should not use a URL print data flavor to print a document stored in a local file that is not available at a URL accessible independently of the client.
To print such documents, let the client open an input stream on the URL or file and use an input stream data flavor. Also jsva that this is different than the behaviour of the Java runtime when interpreting a stream of bytes as text data. That vocflavor the default encoding for the user’s locale. Thus, when spooling a file in local encoding to a Java Print Service it is jwva to correctly specify the encoding. Developers working in the English locales should be particularly conscious of this, as their platform encoding corresponds to the default mime charset.
By this coincidence that particular case may work without specifying the encoding of platform data. Every instance of the Java virtual machine has a default character encoding determined during virtual-machine startup and typically depends upon the locale and charset being used by the underlying operating system. In a distributed environment there is no gurantee that two VM’s share the same default encoding.
Thus clients which want to stream platform encoded text data from the host platform to a Java Print Service instance must explicitly declare the charset docflabor not rely on defaults.
The preferred form is the official IANA primary name for an encoding. Applications which stream text data should always specify the charset in the mime type, which necessitates obtaining the encoding of the host platform for data eg files stored in that platform’s encoding.
A CharSet which corresponds to this and is suitable for use in a mime-type for a DocFlavor can be obtained from DocFlavor. See character encodings for more information on the character encodings supported on the Java platform. Nested classes docflavo class DocFlavor declare predefined static constant DocFlavor objects for these example doc flavors; class DocFlavor’s constructor can be used to create an arbitrary doc flavor.
In general, preformatted autosense print data is provided in a byte oriented representation class byte array, InputStream, URL. The doc flavor’s representation class denotes an interface whose methods the DocPrintJob invokes to jzva the content to be printed — such as a renderable image interface or a Java printable interface.
This MIME type is just a placeholder; what’s important is the print xocflavor representation class.
For service formatted print data, the print data representation class is typically one of the following although other representation classes are permitted. Renderable image object — The client supplies an object that implements interface RenderableImage. The printer calls methods in that interface to obtain the image to be printed. Printable object — The client supplies an object that implements docvlavor Printable.
The printer calls methods in that interface to obtain the pages to be printed, one by one. For each page, the printer supplies a graphics context, and whatever the client jsva in that graphics context gets printed. Pageable object — The client supplies an object that implements interface Pageable. Pre-defined Doc Flavors A Java Print Service instance is not required to support the following print data formats and print data representation classes.
In fact, a developer using this class should never assume that a particular print service supports the document types corresponding to these pre-defined doc flavors. Always query the print service to determine what doc flavors it supports. However, developers who have print services that support these doc flavors are encouraged to refer to the predefined singleton instances created here. Plain text print data provided through a byte stream.
Specifically, the following doc flavors are recommended to be supported: InputStream” Renderable image objects. Specifically, the following doc flavor is recommended to be supported: RenderableImage” A Java Print Service instance is allowed to support any other doc flavors or none in addition to the above mandatory ones, at the implementation’s choice. Support for the above doc flavors is desirable so a printing client can rely on being able to print on any JPS printer, regardless of which doc flavors the printer supports.
If the printer doesn’t support the client’s preferred doc flavor, the client can at least print plain text, or the client can uava its data to a renderable image and print the image.
Furthermore, every Java Print Service instance must fulfill these requirements for processing plain text print data: The character pair carriage return-line feed CR-LF means “go to column 1 of the next line. Design Rationale Class DocFlavor in package javax.
Java example source code file (PrintAutoSenseData.java)
The implementation of class java. DataFlavor does not guarantee that equivalent data flavors will have the same serialized representation. DocFlavor does, and can be used in services which need this. DataFlavor includes a human presentable name as part of the serialized representation. This is not appropriate mava part of a service matching constraint. Thus, docglavor doc flavors with MIME types that are not identical but that are equivalent that have the same canonical form may be considered equal.
The media type, media subtype, and parameters doxflavor retained, but all comments and whitespace characters are discarded. The media type, media subtype, and parameter names are converted to lowercase. The parameter values retain their original case, except a charset parameter value for a text media type is converted to lowercase.
Quote characters surrounding parameter values are removed. Quoting backslash characters inside parameter values are removed.
Java Code Examples of vor
The parameters are arranged in ascending order of parameter name. Class Docflavoe serialized representation also contains the fully-qualified class name of the representation class a String objectrather than the representation class itself a Class object.
This allows a client to examine the doc flavors a Java Print Service instance supports without having to load the representation classes, which may be problematic for limited-resource clients.
InputStream as the print data representation class. Reader as the jaav data representation class. String as the print data representation class. URL dlcflavor predefined static constant DocFlavor objects. String getRepresentationClassName Returns the name of this doc flavor object’s representation class. String toString Converts this DocFlavor to a string.
IANA Charset Registration Procedures except where historical names are returned for compatibility with previous versions of the Java platform. The value returned from method is valid only for the VM which returns it, for use in a DocFlavor. The given MIME type is converted into canonical form and stored internally. Each parameter value is enclosed in quotes.
Mime types may include parameters which are usually optional. The charset for text types is a commonly useful example. This convenience method will return the value of the specified parameter if one was specified in the mime type for this flavor. This name dkcflavor internally converted to the canonical lower case format before performing the match. String representing a mime parameter, or null if that parameter is not in the mime type string. MIME type string based on the canonical form.
The two are equal if the given object is not null, is an instance of DocFlavorhas a Docflacor type equivalent to this doc flavor object’s MIME type that is, the MIME types have the same media type, media subtype, and parametersand has the same representation class name docfkavor this doc flavor object.
Thus, if two doc flavor objects’ MIME types are the same except for comments, they are considered equal. True if this doc flavor object equals objfalse otherwise. That documentation docflavod more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Use is subject to license terms. Also see the documentation redistribution policy. DocFlavor All Implemented Interfaces: SerializableCloneable Direct Known Subclasses: Additionally a few historical names supported by earlier versions of the Java docflafor may be recognized.