graphql-java/src/main/java/graphql/Assert.java at master · feifeiq/graphql-java · GitHub

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package graphql;

import java.util.Collection;

@Internal

public class Assert {

public static <T> T assertNotNull(T object, String errorMessage) {

if (object != null) return object;

throw new AssertException(errorMessage);

}

public static <T> T assertNotNull(T object) {

if (object != null) return object;

throw new AssertException("Object required to be not null");

}

public static <T> T assertNeverCalled() {

throw new AssertException("Should never been called");

}

public static <T> T assertShouldNeverHappen(String errorMessage) {

throw new AssertException("Internal error: should never happen: " + errorMessage);

}

public static <T> T assertShouldNeverHappen() {

throw new AssertException("Internal error: should never happen");

}

public static <T> Collection<T> assertNotEmpty(Collection<T> c, String errorMessage) {

if (c == null || c.isEmpty()) throw new AssertException(errorMessage);

return c;

}

public static void assertTrue(boolean condition, String errorMessage) {

if (condition) return;

throw new AssertException(errorMessage);

}

private static final String invalidNameErrorMessage = "Name must be non-null, non-empty and match [_A-Za-z][_0-9A-Za-z]*";

/**

* 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(invalidNameErrorMessage);

}

graphql-java/src/main/java/graphql/Assert.java at master · feifeiq/graphql-java · GitHub

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