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Copy pathTemplateMethod.java
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64 lines (54 loc) · 1.34 KB
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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package designpatterns;
import java.util.ArrayList;
/**
*
* @author jtherrell
*/
abstract class WordProcessorApplication {
private ArrayList<Document> docs;
protected Log log;
public WordProcessorApplication(Log log) {
docs = new ArrayList<Document>();
this.log = log;
}
public void openDocument(String filename) {
log.append("TEMPLATE METHOD START:");
if (!canOpenDocument(filename))
return;
Document doc = doCreateDocument(filename);
if (doc != null) {
docs.add(doc);
aboutToOpenDocument();
doc.open();
doc.read();
}
log.append("TEMPLATE METHOD END");
}
abstract public boolean canOpenDocument(String filename);
abstract public Document doCreateDocument(String filename);
abstract public void aboutToOpenDocument();
}
class UnixWordProcessorApplication extends WordProcessorApplication {
public UnixWordProcessorApplication(Log log) {
super(log);
}
@Override
public boolean canOpenDocument(String filename) {
log.append("UNIX canOpen:");
return true;
}
@Override
public Document doCreateDocument(String filename) {
log.append("UNIX doCreate:");
return new Document(filename);
}
@Override
public void aboutToOpenDocument() {
log.append("UNIX aboutTo:");
// Do any setup prior to opening doc
}
}