checker/src/main/java/org/checkerframework/checker/calledmethods/builder/BuilderFrameworkSupportUtils.java

package org.checkerframework.checker.calledmethods.builder;

import javax.lang.model.type.TypeMirror;

/** A utility class of static methods used in supporting builder-generation frameworks. */
public class BuilderFrameworkSupportUtils {
  /** This class is non-instantiable. */
  private BuilderFrameworkSupportUtils() {
    throw new Error("Do not instantiate");
  }

  /**
   * Returns true if the given type is one of the immutable collections defined in
   * com.google.common.collect.
   *
   * @param type a type
   * @return true if the type is a Guava immutable collection
   */
  public static boolean isGuavaImmutableType(TypeMirror type) {
    return type.toString().startsWith("com.google.common.collect.Immutable");
  }

  /**
   * Capitalizes the first letter of the given string.
   *
   * @param prop a String
   * @return the same String, but with the first character capitalized
   */
  public static String capitalize(String prop) {
    return prop.substring(0, 1).toUpperCase() + prop.substring(1);
  }
}