Red Hat Web Application Framework 6.1 Manual do Utilizador descarregar pdf (Página 144)

130 Chapter 11. Services Tutorials

Category b = new Category(new OID(124));

Category c = new Category(new OID(125));

if ( a != null && b != null && c != null ) {

// Makes Category B the parent of Category A

b.addChild(a);

// Makes Category C the parent of Category A

c.addChild(a);

// Sets Category B as the default parent of Category A

a.setDefaultParentCategory(b);

}

Example 11-3. Adding more parent categories

Figure 11-6. Category hierarchy before and after adding parent categories.

11.2.4. Removing Parent Categories

// Fetch category A from the database.

Category a = new Category(new OID(123));

// Fetch the parent category

Category b = a.getDefaultParentCategory();

b.removeChild(a);

a.setDefaultParentCategory(b.getDefaultParentCategory());

Example 11-4. Removing Parent Categories

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Red Hat Web Application Framework 6.1 Manual do Utilizador Página 144