java regex extract not working?

Question

What am i missing??

This is the 'dataStoreConstructor' I am passing to the method code below -

url='https://www.salesforce.com/services/Soap/u/26.0',corpnet_prodnet='Corpnet'

  public void registerDataStoreInRepository(String dataStoreConstructor) throws DragonException{
    String constructorPattern = "url='([^']*?)',corpnet_prodnet='([^']*?)'";
    System.out.println(constructorPattern);
    System.out.println(dataStoreConstructor);
    Pattern pattern = Pattern.compile(constructorPattern);
    Matcher matcher = pattern.matcher(dataStoreConstructor);

    SalesforceDataStore sfDataStore = new SalesforceDataStore.Builder(this, matcher.group(1), matcher.group(0)).build();
  };

This is the output I see -

url='([^']*?)',corpnet_prodnet='([^']*?)'Exception in thread "main" 
url='https://www.salesforce.com/services/Soap/u/26.0',corpnet_prodnet='Corpnet'
java.lang.IllegalStateException: No match found
    at java.util.regex.Matcher.group(Matcher.java:485)
    at com.dragon.dictionary.salesforce.SalesforcePlatform.registerDataStoreInRepository(SalesforcePlatform.java:63)

sorry for the typo in the output - Why is this causing a 'No match found' exception then? — Bi Act
– Bi Act, Commented Sep 26, 2014 at 5:45
The pattern looks good, however the lazy quantifiers are useless since you use a negated character class: '([^']*)' — Casimir et Hippolyte
– Casimir et Hippolyte, Commented Sep 26, 2014 at 5:52

blackSmith · Accepted Answer · 2014-09-26 05:49:49Z

3

Regex is fine. Just call :

matcher.find()

once before calling matcher.group().Your problem will be solved.

answered Sep 26, 2014 at 5:49

blackSmith

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Erwin Bolwidt · Accepted Answer · 2014-09-26 05:49:48Z

2

Use this:

if (matcher.find()) {
    SalesforceDataStore sfDataStore = new SalesforceDataStore.Builder(this, matcher.group(1), matcher.group(0)).build();
}

You've forgotten to tell the matcher to go and find something :-)

answered Sep 26, 2014 at 5:49

Erwin Bolwidt

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