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• 1.1.0
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• Function.java

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com.bluecatcode.common.functions.Function Maven / Gradle / Ivy

package com.bluecatcode.common.functions;

import javax.annotation.Nullable;

/**
 * Determines an output value based on an input value.
 *
 * @since 1.1.0
 */
public interface Function extends CheckedFunction {
  /**
   * Returns the result of applying this function to {@code input}. This method is generally
   * expected, but not absolutely required, to have the following properties:
   *
   * 

   * 
Its execution does not cause any observable side effects.
   * 
The computation is consistent with equals
   * 
   *
   * @throws NullPointerException if {@code input} is null and this function does not accept null arguments
   * @throws RuntimeException if unable to compute
   */
  @Nullable
  T apply(@Nullable F input) throws RuntimeException;
}