Commit 1e4cd1e

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fly weight pattern

design with handling tags in database

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Lines changed: 25 additions & 0 deletions

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	`1`	`+package sdp.flyweight;`
	`2`	`+`
	`3`	`+/**`
	`4`	`+ *`
	`5`	`+ * @author rafiul islam`
	`6`	`+ */`
	`7`	`+public class HashTag implements Tag{`
	`8`	`+ private String tagName;`
	`9`	`+ private int primaryKey;`
	`10`	`+`
	`11`	`+ public HashTag(String tagName, int primaryKey){`
	`12`	`+ this.tagName = tagName;`
	`13`	`+ this.primaryKey = primaryKey;`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ @Override`
	`17`	`+ public String name(){`
	`18`	`+ return tagName;`
	`19`	`+ }`
	`20`	`+`
	`21`	`+ @Override`
	`22`	`+ public int id(){`
	`23`	`+ return primaryKey;`
	`24`	`+ }`
	`25`	`+}`

Lines changed: 23 additions & 0 deletions

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	`1`	`+package sdp.flyweight;`
	`2`	`+`
	`3`	`+import java.util.HashMap;`
	`4`	`+`
	`5`	`+/**`
	`6`	`+ *`
	`7`	`+ * @author rafiul islam`
	`8`	`+ */`
	`9`	`+public class HashTagTable {`
	`10`	`+ private static int autoPrimaryKey = 1;`
	`11`	`+ private static HashMap table = new HashMap();`
	`12`	`+`
	`13`	`+ public static HashTag getOrCreate(String tag){`
	`14`	`+ tag = tag.toLowerCase();`
	`15`	`+ HashTag hashTag = (HashTag) table.get(tag);`
	`16`	`+`
	`17`	`+ if(hashTag == null){`
	`18`	`+ hashTag = new HashTag(tag, autoPrimaryKey++);`
	`19`	`+ table.put(tag, hashTag);`
	`20`	`+ }`
	`21`	`+ return hashTag;`
	`22`	`+ }`
	`23`	`+}`

Lines changed: 17 additions & 0 deletions

Original file line number	Diff line number	Diff line change
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	`1`	`+package sdp.flyweight;`
	`2`	`+`
	`3`	`+/**`
	`4`	`+ *`
	`5`	`+ * @author rafiul islam`
	`6`	`+ */`
	`7`	`+public class Main {`
	`8`	`+ public static void main(String[] args) {`
	`9`	`+ String[] tags = {"endgame","EndGame", "avengers", "Avengers", "ENDGAME"};`
	`10`	`+`
	`11`	`+ HashTag twitterHashTag;`
	`12`	`+ for(String item : tags){`
	`13`	`+ twitterHashTag = HashTagTable.getOrCreate(item);`
	`14`	`+ System.out.println(twitterHashTag.id()+" : "+twitterHashTag.name());`
	`15`	`+ }`
	`16`	`+ }`
	`17`	`+}`

Lines changed: 10 additions & 0 deletions

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