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com.facebook.presto.jdbc.internal.javax.annotation.RegEx Maven / Gradle / Ivy

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package com.facebook.presto.jdbc.internal.javax.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;

import com.facebook.presto.jdbc.internal.javax.annotation.meta.TypeQualifierNickname;
import com.facebook.presto.jdbc.internal.javax.annotation.meta.TypeQualifierValidator;
import com.facebook.presto.jdbc.internal.javax.annotation.meta.When;

/**
 * This qualifier is used to denote String values that should be a Regular
 * expression.
 * 

* When this annotation is applied to a method it applies to the method return value. */ @Documented @Syntax("RegEx") @TypeQualifierNickname @Retention(RetentionPolicy.RUNTIME) public @interface RegEx { When when() default When.ALWAYS; static class Checker implements TypeQualifierValidator { public When forConstantValue(RegEx annotation, Object value) { if (!(value instanceof String)) return When.NEVER; try { Pattern.compile((String) value); } catch (PatternSyntaxException e) { return When.NEVER; } return When.ALWAYS; } } }





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