本文整理汇总了Java中nl.flotsam.xeger.Xeger类的典型用法代码示例。如果您正苦于以下问题：Java Xeger类的具体用法？Java Xeger怎么用？Java Xeger使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
Xeger类属于nl.flotsam.xeger包，在下文中一共展示了Xeger类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: GenerateMatchingTupleHelper
import nl.flotsam.xeger.Xeger; //导入依赖的package包/类
ConstraintResult GenerateMatchingTupleHelper(RegexExpression pred,
boolean invert) throws FrontendException, ExecException {
// now we are sure that the expression operators are the roots of the
// plan
Object rightConst = null;
int leftCol = -1;
ConstraintResult ret = new ConstraintResult();
LogicalExpression lhs = pred.getLhs();
if (lhs instanceof CastExpression)
lhs = ((CastExpression) lhs).getExpression();
// if (!(pred.getLhsOperand() instanceof ProjectExpression &&
// ((ProjectExpression)
// pred
// .getLhsOperand()).getProjection().size() == 1))
// return; // too hard
if (!(lhs instanceof ProjectExpression))
return ret;
//leftCol = ((ProjectExpression) lhs).getColNum();
// LogicalFieldSchema lfs = schema.getFieldSubNameMatch(((ProjectExpression)lhs).getFieldSchema().alias);
// if ( lfs != null) {
// leftCol = schema.getFields().indexOf(lfs);
// } else
// return ret;
leftCol = extr.extractPosition(schema, ((ProjectExpression)lhs).getFieldSchema().alias);
if(leftCol == -1)
return ret;
if (!(pred.getRhs() instanceof ConstantExpression))
return ret;
rightConst = ((ConstantExpression) (pred.getRhs())).getValue();
Xeger generator = new Xeger((String) rightConst);
String text = generator.generate();
// now we try to change some nulls to constants
if (invert)
tOut.set(leftCol, text + "edu.umass.cs.pig");
else
tOut.set(leftCol, text);
ret = new ConstraintResult(CntrTruth.toCntrTruth(invert));
return ret;
}
示例2: test
import nl.flotsam.xeger.Xeger; //导入依赖的package包/类
@Test
public void test() {
// String regex = "[ab]{4,6}c";
String regex = "(regular|tonic)(ly)?";
Xeger generator = new Xeger(regex);
String result = generator.generate();
assertTrue(result.matches(regex));
// bruteforce
Set<String> generated = new HashSet<>();
for (int i = 0; i < 100000; i++) {
generated.add(generator.generate());
}
for (String g : generated) {
System.out.println(g);
}
}
示例3: expand
import nl.flotsam.xeger.Xeger; //导入依赖的package包/类
public static Set<String> expand(String regex) {
Xeger generator = new Xeger(regex);
Set<String> generated = new HashSet<>();
for (int i = 0; i < 10000; i++) { // bruteforce
generated.add(generator.generate());
}
return generated;
}
示例4: GenerateMatchingTupleHelper
import nl.flotsam.xeger.Xeger; //导入依赖的package包/类
ConstraintResultCoral GenerateMatchingTupleHelper(RegexExpression pred,
boolean invert) throws FrontendException, ExecException {
// now we are sure that the expression operators are the roots of the
// plan
Object rightConst = null;
int leftCol = -1;
ConstraintResultCoral ret = new ConstraintResultCoral();
LogicalExpression lhs = pred.getLhs();
if (lhs instanceof CastExpression)
lhs = ((CastExpression) lhs).getExpression();
// if (!(pred.getLhsOperand() instanceof ProjectExpression &&
// ((ProjectExpression)
// pred
// .getLhsOperand()).getProjection().size() == 1))
// return; // too hard
if (!(lhs instanceof ProjectExpression))
return ret;
//leftCol = ((ProjectExpression) lhs).getColNum();
// LogicalFieldSchema lfs = schema.getFieldSubNameMatch(((ProjectExpression)lhs).getFieldSchema().alias);
// if ( lfs != null) {
// leftCol = schema.getFields().indexOf(lfs);
// } else
// return ret;
leftCol = extr.extractPosition(schema, ((ProjectExpression)lhs).getFieldSchema().alias);
if(leftCol == -1)
return ret;
if (!(pred.getRhs() instanceof ConstantExpression))
return ret;
rightConst = ((ConstantExpression) (pred.getRhs())).getValue();
Xeger generator = new Xeger((String) rightConst);
String text = generator.generate();
// now we try to change some nulls to constants
if (invert)
tOut.set(leftCol, text + "edu.umass.cs.pig");
else
tOut.set(leftCol, text);
ret = new ConstraintResultCoral(CntrTruth.toCntrTruth(invert));
return ret;
}
示例5: makeTraces
import nl.flotsam.xeger.Xeger; //导入依赖的package包/类
public String[] makeTraces(StringTracesMakerCmdParameters params) {
String regexp = "(" + params.regexps[0] + ")";
Double avgChrsPerString = 0.0;
long totalChrs = 0L;
// building the intersection of the regular expressions
for (int i = 1; i < params.regexps.length; i++) {
regexp += "&(" + params.regexps[i] + ")";
}
// limiting the vocabulary
String regexpLimitingTheVocabulary = "";
for (Character s : params.alphabet) {
regexpLimitingTheVocabulary += s;
}
regexp = "([" + regexpLimitingTheVocabulary + "]*)&" + regexp;
// limiting the number of characters per string
if (params.isMinChrsPerStringGiven() || params.isMaxChrsPerStringGiven()) {
regexp =
regexp +
"&(.{" +
( params.isMinChrsPerStringGiven()
? params.printMinChrsPerString()
: "0"
) +
"," +
( params.isMaxChrsPerStringGiven()
? params.printMaxChrsPerString()
: ""
) +
"})";
}
// generating random strings
Xeger generator = new Xeger(regexp);
String[] testBedArray = new String[params.size.intValue()];
int zeroPaddingCharsAmount = (int)(Math.ceil(Math.log10(testBedArray.length)));
if (zeroPaddingCharsAmount < 1)
zeroPaddingCharsAmount = 1;
for (int i = 0; i < testBedArray.length; i++) {
testBedArray[i] = generator.generate();
totalChrs += testBedArray[i].length();
logger.trace(String.format("%0" + zeroPaddingCharsAmount + "d", (i)) + ")\t" + testBedArray[i]);
}
avgChrsPerString = 1.0 * totalChrs / params.size;
logger.trace(
"\n"
+ "[Testbed]"
+ (
"\n\n"
+ "Regular expression(s) generating the proofs: " + params.printRegExps() + "\n"
+ "(extended: " + regexp + ")\n"
+ "conjunction of " + params.getNumberOfConstraints() + " constraint(s)" + "\n"
+ "over " + params.size + " cases" + "\n"
+ "(length of strings ranging from " + params.printMinChrsPerString()
+ " to " + params.printMaxChrsPerString() + ")\n"
+ "(average length of strings: " + avgChrsPerString + ")\n"
+ "with the alphabet: " + params.printAlphabet()
).replaceAll("\n", "\n\t")
);
if (store(params, testBedArray) && params.logFile != null) {
logger.info("Log file stored in: " + params.logFile.getAbsolutePath());
}
return testBedArray;
}