1 package nom.tam.fits;
2
3 import java.io.PrintStream;
4
5 import nom.tam.fits.header.IFitsHeader;
6 import nom.tam.fits.header.Standard;
7 import nom.tam.util.ArrayFuncs;
8 import nom.tam.util.Cursor;
9
10 /*
11 * #%L
12 * nom.tam FITS library
13 * %%
14 * Copyright (C) 2004 - 2024 nom-tam-fits
15 * %%
16 * This is free and unencumbered software released into the public domain.
17 *
18 * Anyone is free to copy, modify, publish, use, compile, sell, or
19 * distribute this software, either in source code form or as a compiled
20 * binary, for any purpose, commercial or non-commercial, and by any
21 * means.
22 *
23 * In jurisdictions that recognize copyright laws, the author or authors
24 * of this software dedicate any and all copyright interest in the
25 * software to the public domain. We make this dedication for the benefit
26 * of the public at large and to the detriment of our heirs and
27 * successors. We intend this dedication to be an overt act of
28 * relinquishment in perpetuity of all present and future rights to this
29 * software under copyright law.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
34 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
35 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
36 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
37 * OTHER DEALINGS IN THE SOFTWARE.
38 * #L%
39 */
40
41 import static nom.tam.fits.header.Standard.NAXIS1;
42 import static nom.tam.fits.header.Standard.NAXIS2;
43 import static nom.tam.fits.header.Standard.TBCOLn;
44 import static nom.tam.fits.header.Standard.TFIELDS;
45 import static nom.tam.fits.header.Standard.TFORMn;
46 import static nom.tam.fits.header.Standard.TNULLn;
47 import static nom.tam.fits.header.Standard.TTYPEn;
48 import static nom.tam.fits.header.Standard.TUNITn;
49 import static nom.tam.fits.header.Standard.TZEROn;
50 import static nom.tam.fits.header.Standard.XTENSION;
51 import static nom.tam.fits.header.Standard.XTENSION_ASCIITABLE;
52
53 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
54
55 /**
56 * ASCII table header/data unit. ASCII table HDUs were desgined for human readability, e.g. on a console, without any
57 * special tools. However, they are far less flexible or compact than {@link BinaryTableHDU}. As such, users are
58 * generally discouraged from using this type of HDU to encapsulate FITS table data.
59 * {@link FitsFactory#setUseAsciiTables(boolean)} can be toggled to adjust whether {@link Fits#makeHDU(Object)} or
60 * similar methods should construct ASCII tables when possible. (The default setting is to produce binary tables
61 * always.)
62 *
63 * @see AsciiTable
64 * @see BinaryTableHDU
65 */
66 public class AsciiTableHDU extends TableHDU<AsciiTable> {
67
68 /**
69 * The standard column stems for an ASCII table. Note that TBCOL is not included here -- it needs to be handled
70 * specially since it does not simply shift.
71 */
72 private static final IFitsHeader[] KEY_STEMS = {TFORMn, TZEROn, TNULLn, TTYPEn, TUNITn};
73
74 /**
75 * Create an ASCII table header/data unit.
76 *
77 * @deprecated (<i>for internal use</i>) Its visibility should be reduced to package level in the future.
78 *
79 * @param h the template specifying the ASCII table.
80 * @param d the FITS data structure containing the table data.
81 */
82 @Deprecated
83 public AsciiTableHDU(Header h, AsciiTable d) {
84 super(h, d);
85 }
86
87 @Override
88 protected final String getCanonicalXtension() {
89 return XTENSION_ASCIITABLE;
90 }
91
92 /**
93 * @deprecated (<i>for internal use</i>) Use {@link AsciiTable#fromColumnMajor(Object[])} instead.
94 * Will reduce visibility in the future
95 *
96 * @return a ASCII table data structure from an array of objects representing the columns.
97 *
98 * @param o the array of object to create the ASCII table
99 *
100 * @throws FitsException if the table could not be created.
101 */
102 @Deprecated
103 public static AsciiTable encapsulate(Object o) throws FitsException {
104 return AsciiTable.fromColumnMajor((Object[]) o);
105 }
106
107 /**
108 * @deprecated (<i>for internal use</i>) Will reduce visibility in the future
109 *
110 * @return true if this data is usable as an ASCII table.
111 *
112 * @param o object representing the data
113 */
114 @SuppressFBWarnings(value = "HSM_HIDING_METHOD", justification = "deprecated existing method, kept for compatibility")
115 @Deprecated
116 public static boolean isData(Object o) {
117
118 if (o instanceof Object[]) {
119 for (Object element : (Object[]) o) {
120 if (!(element instanceof String[]) && //
121 !(element instanceof int[]) && //
122 !(element instanceof long[]) && //
123 !(element instanceof float[]) && //
124 !(element instanceof double[])) {
125 return false;
126 }
127 }
128 return true;
129 }
130
131 return false;
132 }
133
134 /**
135 * Check that this is a valid ascii table header.
136 *
137 * @deprecated (<i>for internal use</i>) Will reduce visibility in the future
138 *
139 * @param header to validate.
140 *
141 * @return <CODE>true</CODE> if this is an ascii table header.
142 */
143 @SuppressFBWarnings(value = "HSM_HIDING_METHOD", justification = "deprecated existing method, kept for compatibility")
144 @Deprecated
145 public static boolean isHeader(Header header) {
146 String xtension = header.getStringValue(XTENSION);
147 xtension = xtension == null ? "" : xtension.trim();
148 return XTENSION_ASCIITABLE.equals(xtension);
149 }
150
151 /**
152 * Prepares a data object into which the actual data can be read from an input subsequently or at a later time.
153 *
154 * @deprecated (<i>for internal use</i>) Will reduce visibility in the future
155 *
156 * @param hdr The FITS header that describes the data
157 *
158 * @return A data object that support reading content from a stream.
159 *
160 * @throws FitsException if the data could not be prepared to prescriotion.
161 */
162 @Deprecated
163 public static AsciiTable manufactureData(Header hdr) throws FitsException {
164 return new AsciiTable(hdr);
165 }
166
167 /**
168 * @deprecated (<i>for internal use</i>) Will reduce visibility in the future
169 *
170 * @return a created header to match the input data.
171 *
172 * @param d data to create a header for
173 *
174 * @throws FitsException if the header could not b e created
175 */
176 @Deprecated
177 public static Header manufactureHeader(Data d) throws FitsException {
178 Header hdr = new Header();
179 d.fillHeader(hdr);
180 hdr.iterator();
181 return hdr;
182 }
183
184 @Override
185 public void setColumnName(int index, String name, String comment)
186 throws IndexOutOfBoundsException, HeaderCardException {
187 super.setColumnName(index, name, comment);
188 myData.setColumnName(index, name);
189 }
190
191 @SuppressWarnings("deprecation")
192 @Override
193 public int addColumn(Object newCol) throws FitsException {
194 Standard.context(AsciiTable.class);
195 myData.addColumn(newCol);
196 // Move the iterator to point after all the data describing
197 // the previous column.
198
199 Cursor<String, HeaderCard> iter = myHeader.positionAfterIndex(TBCOLn, myData.getNCols());
200
201 int rowlen = myData.addColInfo(getNCols() - 1, iter);
202 int oldRowlen = myHeader.getIntValue(NAXIS1);
203 myHeader.setNaxis(1, rowlen + oldRowlen);
204
205 super.addColumn(newCol);
206 Standard.context(null);
207 return getNCols();
208 }
209
210 @Override
211 protected IFitsHeader[] columnKeyStems() {
212 return KEY_STEMS;
213 }
214
215 @Override
216 public void info(PrintStream stream) {
217 stream.println("ASCII Table:");
218 stream.println(" Header:");
219 stream.println(" Number of fields:" + myHeader.getIntValue(TFIELDS));
220 stream.println(" Number of rows: " + myHeader.getIntValue(NAXIS2));
221 stream.println(" Length of row: " + myHeader.getIntValue(NAXIS1));
222 stream.println(" Data:");
223 Object[] data = (Object[]) getKernel();
224 for (int i = 0; i < getNCols(); i++) {
225 stream.println(" " + i + ":" + ArrayFuncs.arrayDescription(data[i]));
226 }
227 }
228
229 /**
230 * Checks if a table entry is <code>null</code>
231 *
232 * @param row row index of the element
233 * @param col column index of the element
234 *
235 * @return <code>true</code> if the specified element is <code>null</code>
236 *
237 * @see #setNull(int, int, boolean)
238 * @see AsciiTable#isNull(int, int)
239 */
240 public boolean isNull(int row, int col) {
241 return myData.isNull(row, col);
242 }
243
244 /**
245 * Mark an entry as null.
246 *
247 * @param row row index of the element
248 * @param col column index of the element
249 * @param flag set to null or not
250 *
251 * @see #isNull(int, int)
252 * @see AsciiTable#setNull(int, int, boolean)
253 */
254 public void setNull(int row, int col, boolean flag) {
255
256 if (flag) {
257 String nullStr = myHeader.getStringValue(TNULLn.n(col + 1));
258 if (nullStr == null) {
259 setNullString(col, "NULL");
260 }
261 }
262 myData.setNull(row, col, flag);
263 }
264
265 /**
266 * Set the null string for a column.
267 *
268 * @param col the column index
269 * @param newNull the String representing null
270 *
271 * @throws IllegalArgumentException if the string argument contains characters that are not allowed in FITS headers.
272 * That is if it contains characters outside the range of 0x20 thru 0x7E.
273 */
274 public void setNullString(int col, String newNull) throws IllegalArgumentException {
275 myHeader.positionAfterIndex(TBCOLn, col + 1);
276 HeaderCard card = HeaderCard.create(TNULLn.n(col + 1), newNull);
277 myHeader.deleteKey(card.getKey());
278 myHeader.addLine(card);
279 myData.setNullString(col, newNull);
280 }
281
282 }