31 lines
886 B
Java
31 lines
886 B
Java
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package com.iluwatar;
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import java.io.FileWriter;
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import java.io.IOException;
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/**
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* The Execute Around idiom specifies some code to be executed before and after
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* a method. Typically the idiom is used when the API has methods to be executed in
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* pairs, such as resource allocation/deallocation or lock acquisition/release.
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*
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* In this example, we have SimpleFileWriter class that opens and closes the file
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* for the user. The user specifies only what to do with the file by providing the
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* FileWriterAction implementation.
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*
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*/
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public class App {
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public static void main( String[] args ) throws IOException {
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new SimpleFileWriter("testfile.txt", new FileWriterAction() {
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@Override
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public void writeFile(FileWriter writer) throws IOException {
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writer.write("Hello");
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writer.append(" ");
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writer.append("there!");
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}
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});
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}
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}
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