org.apache.poi.hssf.usermodel.HSSFDataFormat Maven / Gradle / Ivy
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this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
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distributed under the License is distributed on an "AS IS" BASIS,
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See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
/*
* HSSFDataFormat.java
*
* Created on December 18, 2001, 12:42 PM
*/
package org.apache.poi.hssf.usermodel;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import org.apache.poi.hssf.model.InternalWorkbook;
import org.apache.poi.hssf.record.FormatRecord;
import org.apache.poi.ss.usermodel.BuiltinFormats;
import org.apache.poi.ss.usermodel.DataFormat;
/**
* Identifies both built-in and user defined formats within a workbook.
* See {@link BuiltinFormats} for a list of supported built-in formats.
*
* International Formats
* Since version 2003 Excel has supported international formats. These are denoted
* with a prefix "[$-xxx]" (where xxx is a 1-7 digit hexadecimal number).
* See the Microsoft article
*
* Creating international number formats
* for more details on these codes.
*
* @author Andrew C. Oliver (acoliver at apache dot org)
* @author Shawn M. Laubach (slaubach at apache dot org)
*/
public final class HSSFDataFormat implements DataFormat {
private static final String[] _builtinFormats = BuiltinFormats.getAll();
private final Vector _formats = new Vector();
private final InternalWorkbook _workbook;
private boolean _movedBuiltins = false; // Flag to see if need to
// check the built in list
// or if the regular list
// has all entries.
/**
* Constructs a new data formatter. It takes a workbook to have
* access to the workbooks format records.
* @param workbook the workbook the formats are tied to.
*/
HSSFDataFormat(InternalWorkbook workbook) {
_workbook = workbook;
@SuppressWarnings("unchecked")
Iterator i = workbook.getFormats().iterator();
while (i.hasNext()) {
FormatRecord r = i.next();
ensureFormatsSize(r.getIndexCode());
_formats.set(r.getIndexCode(), r.getFormatString());
}
}
public static List getBuiltinFormats() {
return Arrays.asList(_builtinFormats);
}
/**
* get the format index that matches the given format string
* Automatically converts "text" to excel's format string to represent text.
* @param format string matching a built in format
* @return index of format or -1 if undefined.
*/
public static short getBuiltinFormat(String format) {
return (short) BuiltinFormats.getBuiltinFormat(format);
}
/**
* Get the format index that matches the given format
* string, creating a new format entry if required.
* Aliases text to the proper format as required.
* @param pFormat string matching a built in format
* @return index of format.
*/
public short getFormat(String pFormat) {
// Normalise the format string
String format;
if (pFormat.toUpperCase().equals("TEXT")) {
format = "@";
} else {
format = pFormat;
}
// Merge in the built in formats if we haven't already
if (!_movedBuiltins) {
for (int i=0; i<_builtinFormats.length; i++) {
ensureFormatsSize(i);
if (_formats.get(i) == null) {
_formats.set(i, _builtinFormats[i]);
} else {
// The workbook overrides this default format
}
}
_movedBuiltins = true;
}
// See if we can find it
for(int i=0; i<_formats.size(); i++) {
if(format.equals(_formats.get(i))) {
return (short)i;
}
}
// We can't find it, so add it as a new one
short index = _workbook.getFormat(format, true);
ensureFormatsSize(index);
_formats.set(index, format);
return index;
}
/**
* get the format string that matches the given format index
* @param index of a format
* @return string represented at index of format or null if there is not a format at that index
*/
public String getFormat(short index) {
if (_movedBuiltins) {
return _formats.get(index);
}
if(index == -1) {
// YK: formatIndex can be -1, for example, for cell in column Y in test-data/spreadsheet/45322.xls
// return null for those
return null;
}
String fmt = _formats.size() > index ? _formats.get(index) : null;
if (_builtinFormats.length > index && _builtinFormats[index] != null) {
// It's in the built in range
if (fmt != null) {
// It's been overriden, use that value
return fmt;
} else {
// Standard built in format
return _builtinFormats[index];
}
}
return fmt;
}
/**
* get the format string that matches the given format index
* @param index of a built in format
* @return string represented at index of format or null if there is not a builtin format at that index
*/
public static String getBuiltinFormat(short index) {
return BuiltinFormats.getBuiltinFormat(index);
}
/**
* get the number of built-in and reserved builtinFormats
* @return number of built-in and reserved builtinFormats
*/
public static int getNumberOfBuiltinBuiltinFormats() {
return _builtinFormats.length;
}
/**
* Ensures that the formats list can hold entries
* up to and including the entry with this index
*/
private void ensureFormatsSize(int index) {
if(_formats.size() <= index) {
_formats.setSize(index+1);
}
}
}