zzh
/
gatk-3.8
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added fast split(str, delimiter) methodf 

git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@3384 348d0f76-0448-11de-a6fe-93d51630548a
This commit is contained in:
weisburd 2010-05-19 03:37:26 +00:00
parent aedb9f6734
commit 2f3933148d
1 changed files with 51 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
java/src/org/broadinstitute/sting/utils/Utils.java
View File

@ -25,12 +25,19 @@
package org.broadinstitute.sting.utils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.samtools.util.StringUtil;
import org.apache.log4j.Logger;
import org.broadinstitute.sting.utils.collections.Pair;
import java.util.*;
/**
* Created by IntelliJ IDEA.
* User: depristo
@ -150,6 +157,40 @@ public class Utils {
return join(recordSeperator,joinedKeyValues);
}
/**
* Splits a String using indexOf instead of regex to speed things up.
*
* @param str the string to split.
* @param delimiter the delimiter used to split the string.
* @return an array of tokens.
*/
public static ArrayList<String> split(String str, String delimiter) {
return split(str, delimiter, 10);
}
/**
* Splits a String using indexOf instead of regex to speed things up.
*
* @param str the string to split.
* @param delimiter the delimiter used to split the string.
* @param expectedNumTokens The number of tokens expected. This is used to initialize the ArrayList.
* @return an array of tokens.
*/
public static ArrayList<String> split(String str, String delimiter, int expectedNumTokens) {
final ArrayList<String> result = new ArrayList<String>(expectedNumTokens);
int delimiterIdx = -1;
do {
final int tokenStartIdx = delimiterIdx + 1;
delimiterIdx = str.indexOf(delimiter, tokenStartIdx);
final String token = (delimiterIdx != -1 ? str.substring(tokenStartIdx, delimiterIdx) : str.substring(tokenStartIdx) );
result.add(token);
} while( delimiterIdx != -1 );
return result;
}
/**
* join an array of strings given a seperator
* @param separator the string to insert between each array element
@ -177,12 +218,14 @@ public class Utils {
//}
public static <T> String join(String separator, Collection<T> objects) {
final StringBuilder ret = new StringBuilder();
for(final Object o : objects) {
if(ret.length() != 0) {
ret.append(separator);
}
ret.append(o.toString());
if(objects.isEmpty()) {
return "";
}
Iterator<T> iter = objects.iterator();
final StringBuilder ret = new StringBuilder(iter.next().toString());
while(iter.hasNext()) {
ret.append(separator);
ret.append(iter.next().toString());
}
return ret.toString();