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java.lang.Objectvisad.data.text.TextAdapter
public class TextAdapter
this is an VisAD file adapter for comma-, tab- and blank-separated ASCII text file data. It will attempt to create a FlatField from the data and descriptions given in the file and/or the constructor. The text files contained delimited data. The delimiter is determined as follows: if the file has a well-known extension (.csv, .tsv, .bsv) then the delimiter is implied by the extension. In all other cases, the delimiter for the data (and for the "column labels") is determined by reading the first line and looking, in order, for a tab, comma, or blank. Which ever one is found first is taken as the delimiter. Two extra pieces of information are needed: the VisAD "MathType" which is specified as a string (e.g., (x,y)->(temperature)) and may either be the first line of the file or passed in through one of the constructors. The second item are the "column labels" which contain the names of each field in the data. The names of all range components specified in the "MathType" must appear. The names of domain components are optional. The values in this string are separated by the delimiter, as defined above. See visad.data.text.README.text for more details.
Constructor Summary | |
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TextAdapter(java.lang.String filename)
Create a VisAD FlatField from a local Text (comma-, tab- or blank-separated values) ASCII file |
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TextAdapter(java.lang.String filename,
java.lang.String map,
java.lang.String params)
Create a VisAD FlatField from a local Text (comma-, tab- or blank-separated values) ASCII file |
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TextAdapter(java.net.URL url)
Create a VisAD FlatField from a remote Text (comma-, tab- or blank-separated values) ASCII file |
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TextAdapter(java.net.URL url,
java.lang.String map,
java.lang.String params)
Create a VisAD FlatField from a local Text (comma-, tab- or blank-separated values) ASCII file |
Method Summary | |
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Field |
getData()
get the data |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public TextAdapter(java.lang.String filename) throws java.io.IOException, VisADException
filename
- name of local file.
java.io.IOException
- if there was a problem reading the file.
VisADException
- if an unexpected problem occurs.public TextAdapter(java.lang.String filename, java.lang.String map, java.lang.String params) throws java.io.IOException, VisADException
filename
- name of local file.map
- the VisAD "MathType" as a string defining the FlatFieldparams
- the list of parameters used to define what columns
of the text file correspond to what MathType parameters.
java.io.IOException
- if there was a problem reading the file.
VisADException
- if an unexpected problem occurs.public TextAdapter(java.net.URL url) throws java.io.IOException, VisADException
url
- File URL.
java.io.IOException
- if there was a problem reading the file.
VisADException
- if an unexpected problem occurs.public TextAdapter(java.net.URL url, java.lang.String map, java.lang.String params) throws java.io.IOException, VisADException
url
- File URL.map
- the VisAD "MathType" as a string defining the FlatFieldparams
- the list of parameters used to define what columns
of the text file correspond to what MathType parameters.
java.io.IOException
- if there was a problem reading the file.
VisADException
- if an unexpected problem occurs.Method Detail |
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public Field getData()
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