uk.ac.starlink.table.formats

Class TextTableWriter

java.lang.Object

uk.ac.starlink.table.formats.DocumentedStreamStarTableWriter

uk.ac.starlink.table.formats.AbstractTextTableWriter

uk.ac.starlink.table.formats.TextTableWriter

All Implemented Interfaces:

Documented, DocumentedIOHandler, MultiStarTableWriter, StarTableWriter

public class TextTableWriter
extends AbstractTextTableWriter
implements MultiStarTableWriter

A StarTableWriter which outputs text to a human-readable text file. Table parameters (per-table metadata) can optionally be output as well as the table data themselves.

Constructor Summary

Constructors

Constructor and Description
TextTableWriter()

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.
protected java.lang.String	formatValue(java.lang.Object val, ValueInfo vinfo, int width) Formats a data value for output.
java.lang.String	getFormatName() Returns "text";
java.lang.String	getMimeType() Returns a string suitable for use as the value of a MIME Content-Type header.
java.lang.String	getXmlDescription() Returns user-directed documentation in XML format.
boolean	looksLikeFile(java.lang.String location) Returns true if the location argument is equal to "-", indicating standard output.
protected void	printColumnHeads(java.io.OutputStream strm, int[] colwidths, ColumnInfo[] cinfos) Outputs headings for the table columns.
protected void	printLine(java.io.OutputStream strm, int[] colwidths, java.lang.String[] data) Outputs a line of table data.
protected void	printParam(java.io.OutputStream strm, java.lang.String name, java.lang.String value, java.lang.Class<?> clazz) Outputs a parameter and its value.
protected void	printSeparator(java.io.OutputStream strm, int[] colwidths) Outputs a decorative separator line, of the sort you might find between the column headings and the table data.
void	writeStarTables(TableSequence tableSeq, java.io.OutputStream out) Writes an array of StarTable objects to a given output stream.
void	writeStarTables(TableSequence tableSeq, java.lang.String location, StarTableOutput sto) Writes an array of StarTable objects to a given location.

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

getBytes, getMaximumParameterLength, getMaxWidth, getMinNameWidth, getSampledRows, getWriteParameters, setMaximumParameterLength, setMaxWidth, setSampledRows, setWriteParameters, writeStarTable

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

getExtensions, 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

writeStarTable, writeStarTable

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

matchesExtension, readText, toLink

Constructor Detail

TextTableWriter

public TextTableWriter()

Method Detail

getFormatName

public java.lang.String getFormatName()

Returns "text";

Specified by:

getFormatName in interface StarTableWriter

Overrides:

getFormatName in class AbstractTextTableWriter

Returns:

"text"

getMimeType

public java.lang.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

Overrides:

getMimeType in class AbstractTextTableWriter

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 java.lang.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

looksLikeFile

public boolean looksLikeFile(java.lang.String location)

Returns true if the location argument is equal to "-", indicating standard output.

Specified by:

looksLikeFile in interface StarTableWriter

Overrides:

looksLikeFile in class DocumentedStreamStarTableWriter

Parameters:

location - the location name (probably filename)

Returns:

true iff it looks like a file this writer would normally write

writeStarTables

public void writeStarTables(TableSequence tableSeq,
                            java.io.OutputStream out)
                     throws java.io.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:

java.io.IOException

writeStarTables

public void writeStarTables(TableSequence tableSeq,
                            java.lang.String location,
                            StarTableOutput sto)
                     throws java.io.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:

java.io.IOException

formatValue

protected java.lang.String formatValue(java.lang.Object val,
                                       ValueInfo vinfo,
                                       int width)

Description copied from class: AbstractTextTableWriter

Formats a data value for output.

Specified by:

formatValue in class AbstractTextTableWriter

Parameters:

val - the value

vinfo - the metadata object describing val's type

width - maximum preferred width into which the value should be formatted

Returns:

formatted string meaning value, preferably no longer than width characters

printSeparator

protected void printSeparator(java.io.OutputStream strm,
                              int[] colwidths)
                       throws java.io.IOException

Description copied from class: AbstractTextTableWriter

Outputs a decorative separator line, of the sort you might find between the column headings and the table data.

Specified by:

printSeparator in class AbstractTextTableWriter

Parameters:

strm - stream to write into

colwidths - column widths in characters

Throws:

java.io.IOException

printColumnHeads

protected void printColumnHeads(java.io.OutputStream strm,
                                int[] colwidths,
                                ColumnInfo[] cinfos)
                         throws java.io.IOException

Description copied from class: AbstractTextTableWriter

Outputs headings for the table columns.

Specified by:

printColumnHeads in class AbstractTextTableWriter

Parameters:

strm - stream to write into

colwidths - column widths in characters

cinfos - array of column headings

Throws:

java.io.IOException

printLine

protected void printLine(java.io.OutputStream strm,
                         int[] colwidths,
                         java.lang.String[] data)
                  throws java.io.IOException

Description copied from class: AbstractTextTableWriter

Outputs a line of table data.

Specified by:

printLine in class AbstractTextTableWriter

Parameters:

strm - stream to write into

colwidths - column widths in characters

data - array of strings to be output, one per column

Throws:

java.io.IOException

printParam

protected void printParam(java.io.OutputStream strm,
                          java.lang.String name,
                          java.lang.String value,
                          java.lang.Class<?> clazz)
                   throws java.io.IOException

Description copied from class: AbstractTextTableWriter

Outputs a parameter and its value.

Specified by:

printParam in class AbstractTextTableWriter

Parameters:

strm - stream to write into

name - parameter name

value - formatted parameter value

clazz - type of value

Throws:

java.io.IOException