Examples of com.directededge.Item

com.directededge.Item
An item in a Directed Edge database There are of a collection of methods here for reading and writing to items. In general as few reads from the remote database as required will be used, specifically items cache all values when any of them are read and writes will not be made to the remote database until save() is called.

    }


    @Test(expected = IllegalArgumentException.class)
    public void weightedLinksLowerLimit()
    {
        Item customer = new Item(database, "customer0");
        Item product = new Item(database, "product0");
        customer.linkTo(product, -1);
    }

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    }


    @Test
    public void typedLinks()
    {
        Item customer = new Item(database, "customer0");
        Item product = new Item(database, "product0");
        customer.linkTo(product, "purchase");
        customer.save();


        customer = new Item(database, "customer0");
        assertTrue(customer.getLinks("purchase").containsKey("product0"));


        customer.linkTo(product, 5, "wishlist");
        customer.save();


        customer = new Item(database, "customer0");
        customer.getLinks();
        assertEquals(5, customer.getLinks("wishlist").get("product0").intValue());
    }

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    }


    @Test
    public void tags()
    {
        Item customer = new Item(database, "customer0");
        assertTrue(customer.getTags().contains("customer"));
        customer.addTag("test");
        assertTrue(customer.getTags().contains("test"));
        customer.save();
        customer = new Item(database, "customer0");
        assertTrue(customer.getTags().contains("test"));
        customer.removeTag("test");
        assertFalse(customer.getTags().contains("test"));
        customer.save();
        customer = new Item(database, "customer0");
        assertFalse(customer.getTags().contains("test"));
    }

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    }


    @Test
    public void properties()
    {
        Item customer = new Item(database, "customer0");
        customer.setProperty("test", "first");
        assertEquals("first", customer.getProperty("test"));
        customer.setProperty("test", "second");
        assertEquals("second", customer.getProperty("test"));
        customer.save();
        customer = new Item(database, "customer0");
        assertEquals(1, customer.getProperties().size());
        assertEquals("second", customer.getProperty("test"));
        customer.setProperty("test", "third");
        customer.save();
        assertEquals("third", customer.getProperty("test"));
        customer = new Item(database, "customer0");
        assertEquals("third", customer.getProperty("test"));
        customer.clearProperty("test");
        assertEquals(0, customer.getProperties().size());
        customer.save();
        customer = new Item(database, "customer0");
        assertEquals(0, customer.getProperties().size());
    }

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    public void recommended()
    {
        HashSet<String> tags = new HashSet<String>();
        tags.add("product");


        Item customer = new Item(database, "customer0");
        assertEquals(20, customer.getRecommended().size());
        assertEquals(20, customer.getRecommended(tags).size());
        assertEquals(5, customer.getRecommended(tags, 5).size());
    }

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    public void related()
    {
        HashSet<String> tags = new HashSet<String>();
        tags.add("product");


        Item product = new Item(database, "product0");
        assertEquals(20, product.getRelated().size());
        assertEquals(20, product.getRelated(tags).size());
        assertEquals(5, product.getRelated(tags, 5).size());


        HashMap<String, Object> options = new HashMap<String, Object>();
        options.put("popularity", 5);


        List<String> popular = product.getRelated(tags, options);


        options.put("popularity", 1);


        List<String> unpopular = product.getRelated(tags, options);


        assertFalse(popular.equals(unpopular));
    }

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        importTest(database);
    }


    private void importTest(Database database)
    {
        Item customer0 = new Item(database, "customer0");
        assertEquals(customer0.getLinks("").size(), 10);


        Item product49 = new Item(database, "product49");
        assertEquals(product49.getLinks("").size(), 0);
        assertTrue(product49.getTags().contains("product"));
        assertFalse(product49.getTags().contains("user"));
    }

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    }


    private void export(Exporter exporter) throws ParserConfigurationException,
            SAXException, IOException
    {
        Item first = new Item(exporter.getDatabase(), "first");
        Item second = new Item(exporter.getDatabase(), "second");
        first.linkTo(second);
        first.addTag("tag1");
        second.addTag("tag2");
        first.setProperty("testkey", "testvalue");
        exporter.export(first);
        exporter.export(second);
        exporter.finish();

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