com.fitbur.bytebuddy.matcher.FailSafeMatcher Maven / Gradle / Ivy
package com.fitbur.bytebuddy.matcher;
/**
* A fail-safe matcher catches exceptions that are thrown by a delegate matcher and returns an alternative value.
*
* @param The type of the matched entity.
*/
public class FailSafeMatcher extends ElementMatcher.Junction.AbstractBase {
/**
* The delegate matcher that might throw an exception.
*/
private final ElementMatcher delegate;
/**
* The fallback value in case of an exception.
*/
private final boolean fallback;
/**
* Creates a new fail-safe element matcher.
*
* @param delegate The delegate matcher that might throw an exception.
* @param fallback The fallback value in case of an exception.
*/
public FailSafeMatcher(ElementMatcher delegate, boolean fallback) {
this.delegate = delegate;
this.fallback = fallback;
}
@Override
public boolean matches(T target) {
try {
return delegate.matches(target);
} catch (Exception ignored) {
return fallback;
}
}
@Override
public boolean equals(Object other) {
if (this == other) return true;
if (other == null || getClass() != other.getClass()) return false;
FailSafeMatcher that = (FailSafeMatcher) other;
return fallback == that.fallback && delegate.equals(that.delegate);
}
@Override
public int hashCode() {
int result = delegate.hashCode();
result = 31 * result + (fallback ? 1 : 0);
return result;
}
@Override
public String toString() {
return "failSafe(try(" + delegate + ") or " + fallback + ")";
}
}