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Assert.java
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103 lines (85 loc) · 3.12 KB
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package graphql;
import java.util.Collection;
import static java.lang.String.format;
@SuppressWarnings("TypeParameterUnusedInFormals")
@Internal
public class Assert {
public static <T> T assertNotNull(T object, String format, Object... args) {
if (object != null) {
return object;
}
throw new AssertException(format(format, args));
}
public static <T> T assertNotNull(T object) {
if (object != null) {
return object;
}
throw new AssertException("Object required to be not null");
}
public static <T> void assertNull(T object, String format, Object... args) {
if (object == null) {
return;
}
throw new AssertException(format(format, args));
}
public static <T> void assertNull(T object) {
if (object == null) {
return;
}
throw new AssertException("Object required to be null");
}
public static <T> T assertNeverCalled() {
throw new AssertException("Should never been called");
}
public static <T> T assertShouldNeverHappen(String format, Object... args) {
throw new AssertException("Internal error: should never happen: " + format(format, args));
}
public static <T> T assertShouldNeverHappen() {
throw new AssertException("Internal error: should never happen");
}
public static <T> Collection<T> assertNotEmpty(Collection<T> collection) {
if (collection == null || collection.isEmpty()) {
throw new AssertException("collection must be not null and not empty");
}
return collection;
}
public static <T> Collection<T> assertNotEmpty(Collection<T> collection, String format, Object... args) {
if (collection == null || collection.isEmpty()) {
throw new AssertException(format(format, args));
}
return collection;
}
public static void assertTrue(boolean condition, String format, Object... args) {
if (condition) {
return;
}
throw new AssertException(format(format, args));
}
public static void assertTrue(boolean condition) {
if (condition) {
return;
}
throw new AssertException("condition expected to be true");
}
public static void assertFalse(boolean condition, String format, Object... args) {
if (!condition) {
return;
}
throw new AssertException(format(format, args));
}
private static final String invalidNameErrorMessage = "Name must be non-null, non-empty and match [_A-Za-z][_0-9A-Za-z]* - was '%s'";
/**
* Validates that the Lexical token name matches the current spec.
* currently non null, non empty,
*
* @param name - the name to be validated.
*
* @return the name if valid, or AssertException if invalid.
*/
public static String assertValidName(String name) {
if (name != null && !name.isEmpty() && name.matches("[_A-Za-z][_0-9A-Za-z]*")) {
return name;
}
throw new AssertException(String.format(invalidNameErrorMessage, name));
}
}