ex7_25.txt

j2ee core design patterns

Example 7.25 SkillSet-dependent object implements DirtyMarker interface

public class SkillSetTO
implements DirtyMarker, java.io.Serializable {
	private String skillName;
	private String expertiseLevel;
	private String info;
	...

	// dirty flag
	private boolean dirty = false;

	// new flag
	private boolean isnew = true;

	// deleted flag
	private boolean deleted = false;

	public SkillSetTO(...) {
		// initialization
		...
		// is new TO
		setNew();
	}

	// get, set and other methods for SkillSet
	// all set methods and modifier methods
	// must call setDirty()
	public setSkillName(String newSkillName) {
		skillName = newSkillName;
		setDirty();
	}
	...

	// DirtyMarker methods
	// used for modified transfer objects only

	public void setDirty() {
		dirty = true;
	}
	public void resetDirty() {
		dirty = false;
	}
	public boolean isDirty() {
		return dirty;
	}

	// used for new transfer objects only
	public void setNew() {
		isnew = true;
	}
	public void resetNew() {
		isnew = false;
	}
	public boolean isNew() {
		return isnew;
	}

	// used for deleted objects only
	public void setDeleted() {
		deleted = true;
	}
	public boolean isDeleted() {
		return deleted;
	}
	public void resetDeleted() {
		deleted = false;
	}

}