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bugzilla 54137 - improved performance of DataFormatter with Fractions 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1410269 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yegor Kozlov 2012-11-16 09:46:28 +00:00
parent abc9ef9bb8
commit 2365cae199
3 changed files with 108 additions and 12 deletions
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1
src/documentation/content/xdocs/status.xml
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@ -34,6 +34,7 @@
<changes>
<release version="3.9-beta1" date="2012-??-??">
<action dev="poi-developers" type="fix">54137 - improved performance of DataFormatter with Fractions</action>
<action dev="poi-developers" type="fix">54099 - Ensure that CTHMerge and CTTcBorders go to poi-ooxml-schemas jar</action>
<action dev="poi-developers" type="fix">54111 - Fixed extracting text from table cells in HSLF</action>
<action dev="poi-developers" type="add">52583 - add support for drop-down lists in doc to html convertion</action>

80
src/java/org/apache/poi/ss/usermodel/DataFormatter.java
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@ -13,6 +13,10 @@
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
2012 - Alfresco Software, Ltd.
Alfresco Software has modified source of this file
The details of changes as svn diff can be found in svn at location root/projects/3rd-party/src
==================================================================== */
package org.apache.poi.ss.usermodel;
@ -248,6 +252,12 @@ public class DataFormatter {
}
private Format getFormat(double cellValue, int formatIndex, String formatStrIn) {
// // Might be better to separate out the n p and z formats, falling back to p when n and z are not set.
// // That however would require other code to be re factored.
// String[] formatBits = formatStrIn.split(";");
// int i = cellValue > 0.0 ? 0 : cellValue < 0.0 ? 1 : 2;
// String formatStr = (i < formatBits.length) ? formatBits[i] : formatBits[0];
String formatStr = formatStrIn;
// Excel supports positive/negative/zero, but java
// doesn't, so we need to do it specially
@ -364,10 +374,21 @@ public class DataFormatter {
}
// Excel supports fractions in format strings, which Java doesn't
if (!formatStr.contains("-") &&
(formatStr.indexOf("#/#") >= 0 && formatStr.indexOf("#/#") == formatStr.lastIndexOf("#/#")) ||
(formatStr.indexOf("?/?") >= 0 && formatStr.indexOf("?/?") == formatStr.lastIndexOf("?/?"))) {
return new FractionFormat(formatStr);
if (formatStr.indexOf("#/#") >= 0 || formatStr.indexOf("?/?") >= 0) {
// Strip custom text in quotes and escaped characters for now as it can cause performance problems in fractions.
String strippedFormatStr = formatStr.replaceAll("\\\\ ", " ").replaceAll("\\\\.", "").replaceAll("\"[^\"]*\"", " ");
boolean ok = true;
for (String part: strippedFormatStr.split(";")) {
int indexOfFraction = indexOfFraction(part);
if (indexOfFraction == -1 || indexOfFraction != lastIndexOfFraction(part)) {
ok = false;
break;
}
}
if (ok) {
return new FractionFormat(strippedFormatStr);
}
}
if (numPattern.matcher(formatStr).find()) {
@ -380,6 +401,18 @@ public class DataFormatter {
// TODO - when does this occur?
return null;
}
private int indexOfFraction(String format) {
int i = format.indexOf("#/#");
int j = format.indexOf("?/?");
return i == -1 ? j : j == -1 ? i : Math.min(i, j);
}
private int lastIndexOfFraction(String format) {
int i = format.lastIndexOf("#/#");
int j = format.lastIndexOf("?/?");
return i == -1 ? j : j == -1 ? i : Math.max(i, j);
}
private Format createDateFormat(String pFormatStr, double cellValue) {
String formatStr = pFormatStr;
@ -996,14 +1029,26 @@ public class DataFormatter {
}
public String format(Number num) {
double wholePart = Math.floor(num.doubleValue());
double decPart = num.doubleValue() - wholePart;
double doubleValue = num.doubleValue();
// Format may be p or p;n or p;n;z (okay we never get a z).
// Fall back to p when n or z is not specified.
String[] formatBits = str.split(";");
int f = doubleValue > 0.0 ? 0 : doubleValue < 0.0 ? 1 : 2;
String str = (f < formatBits.length) ? formatBits[f] : formatBits[0];
double wholePart = Math.floor(Math.abs(doubleValue));
double decPart = Math.abs(doubleValue) - wholePart;
if (wholePart + decPart == 0) {
return "0";
}
if (doubleValue < 0.0) {
wholePart *= -1.0;
}
// Split the format string into decimal and fraction parts
String[] parts = str.split(" ");
String[] parts = str.replaceAll(" *", " ").split(" ");
String[] fractParts;
if (parts.length == 2) {
fractParts = parts[1].split("/");
@ -1017,11 +1062,12 @@ public class DataFormatter {
}
if (fractParts.length == 2) {
int fractPart1Length = Math.min(countHashes(fractParts[1]), 4); // Any more than 3 and we go around the loops for ever
double minVal = 1.0;
double currDenom = Math.pow(10 , fractParts[1].length()) - 1d;
double currDenom = Math.pow(10 , fractPart1Length) - 1d;
double currNeum = 0;
for (int i = (int)(Math.pow(10, fractParts[1].length())- 1d); i > 0; i--) {
for(int i2 = (int)(Math.pow(10, fractParts[1].length())- 1d); i2 > 0; i2--){
for (int i = (int)(Math.pow(10, fractPart1Length)- 1d); i > 0; i--) {
for(int i2 = (int)(Math.pow(10, fractPart1Length)- 1d); i2 > 0; i2--){
if (minVal >= Math.abs((double)i2/(double)i - decPart)) {
currDenom = i;
currNeum = i2;
@ -1040,9 +1086,19 @@ public class DataFormatter {
return result;
}
} else {
throw new IllegalArgumentException("Fraction must have 2 parts, found " + fractParts.length + " for fraction format " + str);
throw new IllegalArgumentException("Fraction must have 2 parts, found " + fractParts.length + " for fraction format " + this.str);
}
}
private int countHashes(String format) {
int count = 0;
for (int i=format.length()-1; i >= 0; i--) {
if (format.charAt(i) == '#') {
count++;
}
}
return count;
}
public StringBuffer format(Object obj, StringBuffer toAppendTo, FieldPosition pos) {
return toAppendTo.append(format((Number)obj));

39
src/testcases/org/apache/poi/ss/usermodel/TestDataFormatter.java
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@ -13,6 +13,10 @@
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
2012 - Alfresco Software, Ltd.
Alfresco Software has modified source of this file
The details of changes as svn diff can be found in svn at location root/projects/3rd-party/src
==================================================================== */
package org.apache.poi.ss.usermodel;
@ -195,6 +199,41 @@ public class TestDataFormatter extends TestCase {
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "# ?/?"));
assertEquals("321 26/81", dfUS.formatRawCellContents(321.321, -1, "# ?/??"));
assertEquals("26027/81", dfUS.formatRawCellContents(321.321, -1, "?/??"));
// p;n;z;s parts
assertEquals( "321 1/3", dfUS.formatRawCellContents(321.321, -1, "# #/#;# ##/#;0;xxx"));
assertEquals("-321 1/3", dfUS.formatRawCellContents(-321.321, -1, "# #/#;# ##/#;0;xxx"));
assertEquals("0", dfUS.formatRawCellContents(0, -1, "# #/#;# ##/#;0;xxx"));
// assertEquals("0.0", dfUS.formatRawCellContents(0, -1, "# #/#;# ##/#;#.#;xxx")); // currently hard coded to 0
// Custom formats with text are not currently supported
// assertEquals("+ve", dfUS.formatRawCellContents(0, -1, "+ve;-ve;zero;xxx"));
// assertEquals("-ve", dfUS.formatRawCellContents(0, -1, "-ve;-ve;zero;xxx"));
// assertEquals("zero", dfUS.formatRawCellContents(0, -1, "zero;-ve;zero;xxx"));
// Custom formats - check text is stripped, including multiple spaces
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "# #/#"));
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "#\" \" #/#"));
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "#\"FRED\" #/#"));
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "#\\ #/#"));
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "# \\q#/#"));
// Cases that were very slow
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "0\" \"?/?;?/?")); // 0" "?/?;?/? - length of -ve part was used
assertEquals("321 1/3", dfUS.formatRawCellContents(321.321, -1, "0 \"#\"\\#\\#?/?")); // 0 "#"\#\#?/? - length of text was used
assertEquals("321 295/919", dfUS.formatRawCellContents(321.321, -1, "# #/###"));
assertEquals("321 321/1000", dfUS.formatRawCellContents(321.321, -1, "# #/####")); // Code limits to #### as that is as slow as we want to get
assertEquals("321 321/1000", dfUS.formatRawCellContents(321.321, -1, "# #/##########"));
// Not a valid fraction formats (too many #/# or ?/?) - hence the strange expected results
assertEquals("321 / ?/?", dfUS.formatRawCellContents(321.321, -1, "# #/# ?/?"));
assertEquals("321 / /", dfUS.formatRawCellContents(321.321, -1, "# #/# #/#"));
assertEquals("321 ?/? ?/?", dfUS.formatRawCellContents(321.321, -1, "# ?/? ?/?"));
assertEquals("321 ?/? / /", dfUS.formatRawCellContents(321.321, -1, "# ?/? #/# #/#"));
// Where both p and n don't include a fraction, so cannot always be formatted
assertEquals("123", dfUS.formatRawCellContents(-123.321, -1, "0 ?/?;0"));
}
/**