Reference.java

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.doris.common;

/**
 * "Indirection layer" that allows returning an object via an output
 * parameter of a function call, similar to a pointer or reference parameter
 * in C/C++.
 * Example:
 * Reference<T> ref = new Reference<T>();
 * createT(ref);  // calls ref.setRef()
 * <do something with ref.getRef()>;
 */
public class Reference<RefType> {
    protected RefType ref;

    public Reference(RefType ref) {
        this.ref = ref;
    }

    public Reference() {
        this.ref = null;
    }

    public RefType getRef() {
        return ref;
    }

    public void setRef(RefType ref) {
        this.ref = ref;
    }
}