print.java

来自「java 的源代码」· Java 代码 · 共 53 行

package com.reddragon2046.base.utilities.data.functions;

import com.reddragon2046.base.utilities.data.UnaryFunction;
import java.io.*;

public final class Print
    implements UnaryFunction
{

    public Print()
    {
        stream = System.out;
    }

    public Print(PrintStream stream)
    {
        this.stream = stream;
    }

    public Object execute(Object object)
    {
        stream.println(object);
        return object;
    }

    private void writeObject(ObjectOutputStream stream)
        throws IOException
    {
        stream.defaultWriteObject();
        if(this.stream == System.out)
            stream.writeObject(new Boolean(true));
        else
        if(this.stream == System.err)
            stream.writeObject(new Boolean(false));
        else
            stream.writeObject(this.stream);
    }

    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException
    {
        stream.defaultReadObject();
        Object obj = stream.readObject();
        if(obj instanceof Boolean)
            this.stream = ((Boolean)obj).booleanValue() ? System.out : System.err;
        else
            this.stream = (PrintStream)obj;
    }

    transient PrintStream stream;
    static final long serialVersionUID = 0xaef29737514f92a5L;
}