uk.ac.starlink.table.formats

Class HTMLTableWriter

java.lang.Object

uk.ac.starlink.table.formats.DocumentedStreamStarTableWriter

uk.ac.starlink.table.formats.HTMLTableWriter

All Implemented Interfaces:

Documented, DocumentedIOHandler, MultiStarTableWriter, StarTableWriter

public class HTMLTableWriter
extends DocumentedStreamStarTableWriter
implements MultiStarTableWriter

A StarTableWriter that outputs text to HTML. Depending on the value of the standalone attribute, the output may either be a complete HTML document or just a <TABLE> element suitable for inserting into an existing document. The output HTML is intended to conform to HTML 3.2 or 4.01, depending on options.

Author:

Mark Taylor (Starlink)

See Also:

HTML 3.2, HTML 4.01

Constructor Summary

Constructors

Constructor and Description
HTMLTableWriter() Constructs a new writer with default characteristics.
HTMLTableWriter(boolean standalone, boolean useRowGroups) Constructs a new writer indicating whether it will produce complete or partial HTML documents.

Method Summary

Modifier and Type	Method and Description
boolean	docIncludesExample() Indicates whether the serialization of some (short) example table should be added to the user documentation for this handler.
String	getFormatName() Gives the name of the format which is written by this writer.
int	getMaxWidth() Returns the maximum output width in characters for a single cell.
String	getMimeType() Returns a string suitable for use as the value of a MIME Content-Type header.
String	getXmlDescription() Returns user-directed documentation in XML format.
boolean	isStandalone() Indicates whether output tables will be complete HTML documents.
protected boolean	isUrl(String txt) Determines whether a string is apparently a URL.
protected void	printFooter(OutputStream ostrm) For standalone output, this method is invoked to output any text following the </TABLE> end tag.
protected void	printHeader(OutputStream ostrm, StarTable table) For standalone output, this method is invoked to output any text preceding the <TABLE> start tag.
void	setMaxWidth(int maxWidth) Sets the maximum output width in characters for a single cell.
void	setStandalone(boolean standalone) Sets whether output tables should be complete HTML documents.
void	writeStarTable(StarTable table, OutputStream out) Writes a StarTable object to a given output stream.
void	writeStarTables(TableSequence tableSeq, OutputStream out) Writes an array of StarTable objects to a given output stream.
void	writeStarTables(TableSequence tableSeq, String location, StarTableOutput sto) Writes an array of StarTable objects to a given location.

Methods inherited from class uk.ac.starlink.table.formats.DocumentedStreamStarTableWriter

getExtensions, looksLikeFile, writeStarTable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface uk.ac.starlink.table.StarTableWriter

looksLikeFile, writeStarTable

Methods inherited from interface uk.ac.starlink.table.formats.DocumentedIOHandler

matchesExtension, readText, toLink

Constructor Detail

HTMLTableWriter

public HTMLTableWriter()

Constructs a new writer with default characteristics.

HTMLTableWriter

public HTMLTableWriter(boolean standalone,
                       boolean useRowGroups)

Constructs a new writer indicating whether it will produce complete or partial HTML documents.

Method Detail

setStandalone

@ConfigMethod(property="standalone",
              doc="If true, the output is a freestanding HTML document complete with HTML, HEAD and BODY tags. If false, the output is just a TABLE element.")
public void setStandalone(boolean standalone)

Sets whether output tables should be complete HTML documents.

Parameters:

standalone - true if the output document should be a complete HTML document

isStandalone

public boolean isStandalone()

Indicates whether output tables will be complete HTML documents.

Returns:

true if the output documents will be complete HTML docs

setMaxWidth

@ConfigMethod(property="maxCell",
              doc="Maximum width in characters of an output table cell. Cells longer than this will be truncated.")
public void setMaxWidth(int maxWidth)

Sets the maximum output width in characters for a single cell.

Parameters:

maxWidth - new maximum cell width

getMaxWidth

public int getMaxWidth()

Returns the maximum output width in characters for a single cell.

Returns:

maximum cell width

getFormatName

public String getFormatName()

Description copied from interface: StarTableWriter

Gives the name of the format which is written by this writer. Matching against this string may be used by callers to identify or select this writer from a list.

Specified by:

getFormatName in interface StarTableWriter

Returns:

a short string identifying the output format of this writer

getMimeType

public String getMimeType()

Description copied from interface: StarTableWriter

Returns a string suitable for use as the value of a MIME Content-Type header. If no suitable MIME type is available or known, one of "application/octet-stream" (for binary formats) or "text/plain" for ASCII ones) is recommended.

Specified by:

getMimeType in interface StarTableWriter

Returns:

MIME content type

docIncludesExample

public boolean docIncludesExample()

Description copied from interface: DocumentedIOHandler

Indicates whether the serialization of some (short) example table should be added to the user documentation for this handler. Binary formats, or instances for which the Documented.getXmlDescription() method already includes some example output, should return false.

Specified by:

docIncludesExample in interface DocumentedIOHandler

Returns:

true if the user documentation would benefit from the addition of an example serialization

getXmlDescription

public String getXmlDescription()

Description copied from interface: Documented

Returns user-directed documentation in XML format.

The output should be a sequence of one or more <P> elements, using XHTML-like XML. Since rendering may be done in a number of contexts however, use of the full range of XHTML elements is discouraged. Where possible, the content should stick to simple markup such as the elements P, A, UL, OL, LI, DL, DT, DD EM, STRONG, I, B, CODE, TT, PRE.

Specified by:

getXmlDescription in interface Documented

Returns:

XML description of this object

writeStarTable

public void writeStarTable(StarTable table,
                           OutputStream out)
                    throws IOException

Description copied from interface: StarTableWriter

Writes a StarTable object to a given output stream. The implementation can assume that out is suitable for direct writing (for instance it should not normally wrap it in a BufferedOutputStream), and should not close it at the end of the call.

Not all table writers are capable of writing to a stream; an implementation may throw a TableFormatException to indicate that it cannot do so.

Specified by:

writeStarTable in interface StarTableWriter

Parameters:

table - the table to write

out - the output stream to which startab should be written

Throws:

TableFormatException - if this table cannot be written to a stream

IOException - if there is some I/O error

writeStarTables

public void writeStarTables(TableSequence tableSeq,
                            OutputStream out)
                     throws IOException

Description copied from interface: MultiStarTableWriter

Writes an array of StarTable objects to a given output stream. The implementation can assume that the stream is suitable for direct writing (for instance it should not normally wrap it in a BufferedOutputStream), and should not close it at the end of the call.

Specified by:

writeStarTables in interface MultiStarTableWriter

Parameters:

tableSeq - sequence of tables to write

out - destination stream

Throws:

IOException

writeStarTables

public void writeStarTables(TableSequence tableSeq,
                            String location,
                            StarTableOutput sto)
                     throws IOException

Description copied from interface: MultiStarTableWriter

Writes an array of StarTable objects to a given location. Implementations are free to interpret the location argument in any way appropriate for them. Typically however the location will simply be used to get an output stream (for instance interpreting it as a filename). In this case the sto argument should normally be used to turn location into a stream.

Specified by:

writeStarTables in interface MultiStarTableWriter

Parameters:

tableSeq - sequence of tables to write

location - destination for tables

sto - StarTableOutput instance

Throws:

IOException

printHeader

protected void printHeader(OutputStream ostrm,
                           StarTable table)
                    throws IOException

For standalone output, this method is invoked to output any text preceding the <TABLE> start tag. May be overridden to modify the form of output documents.

Parameters:

ostrm - output stream

table - table for which header is required; may be null for multi-table output

Throws:

IOException

printFooter

protected void printFooter(OutputStream ostrm)
                    throws IOException

For standalone output, this method is invoked to output any text following the </TABLE> end tag. May be overridden to modify the form of output documents.

Parameters:

ostrm - output stream

Throws:

IOException

isUrl

protected boolean isUrl(String txt)

Determines whether a string is apparently a URL. If this returns true, it is appropriate to format it within an HTML "a" element.

Parameters:

txt - string to test

Returns:

true iff txt looks like a URL