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.

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


        Item product = new Item(database, "product0");
        assertTrue(product.getRelated(tags).size() > 0);


        tags.add("customer");
        assertTrue(product.getRelated(tags).size() > 0);


        HashMap<String, Object> options = new HashMap<String, Object>();
        options.put("tagOperation", "OR");
        assertTrue(product.getRelated(tags, options).size() > 0);


        options.put("tagOperation", "AND");
        assertFalse(product.getRelated(tags, options).size() > 0);


        Item taggedAsBoth = new Item(database, "product35");
        taggedAsBoth.addTag("customer");
        taggedAsBoth.save();


        assertTrue(product.getRelated(tags, options).size() > 0);
    }

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    }


    @Test
    public void characters()
    {
        Item item = new Item(database, ";@%&!");
        item.setProperty("foo", "bar");
        item.save();


        item = new Item(database, ";@%&!");
        assertEquals("bar", item.getProperty("foo"));


        item = new Item(database, "foo/bar");
        item.setProperty("foo", "bar");
        item.save();


        item = new Item(database, "foo/bar");
        assertEquals("bar", item.getProperty("foo"));
    }

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    }


    @Test
    public void missingItem()
    {
        Item item = new Item(database, "missing");
        item.getRelated();
    }

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    @Test
    public void add()
    {
        updater = new Updater(database);
        Item item = new Item(updater.getDatabase(), "test1");
        item.addTag("test2");
        item.setProperty("test3", "test4");
        updater.export(item);
        updater.finish();


        item = new Item(updater.getDatabase(), "test1");
        assertTrue(item.getTags().contains("test2"));
        assertEquals("test4", item.getProperty("test3"));
    }

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    @Test
    public void subtract()
    {
        updater = new Updater(database, Updater.Method.Subtract);
        Item item = new Item(updater.getDatabase(), "customer1");
        assertTrue(item.getTags().contains("customer"));


        item = new Item(updater.getDatabase(), "customer1");
        item.removeTag("customer");
        updater.export(item);
        updater.finish();


        item = new Item(updater.getDatabase(), "customer1");
        assertFalse(item.getTags().contains("customer"));
        assertTrue(item.getLinks().size() > 0);
    }

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    }


    @Test
    public void create()
    {
        Item item = new Item(database, "test");
        item.linkTo("customer0");
        item.linkTo("customer1");
        item.save();


        item = new Item(database, "test");
        assertTrue(item.getLinks("").containsKey("customer0"));
        assertTrue(item.getLinks("").containsKey("customer1"));
    }

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    }


    @Test
    public void delete() throws ResourceException
    {
        Item item = new Item(database, "customer1");
        assertEquals(item.getLinks().size(), 1);
        item.destroy();
        item = new Item(database, "customer1");
        assertEquals(item.getLinks().size(), 0);


        boolean thrown = false;


        try
        {
            item.destroy();
        }
        catch (ResourceException ex)
        {
            thrown = true;
        }

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    }


    @Test
    public void unweightedLinks()
    {
        Item customer0 = new Item(database, "customer0");
        customer0.linkTo("customer1");
        customer0.save();


        customer0 = new Item(database, "customer0");
        assertTrue(customer0.getLinks("").containsKey("customer1"));


        customer0.unlinkFrom("customer1");
        customer0.save();
        customer0 = new Item(database, "customer0");
        assertFalse(customer0.getLinks("").containsKey("customer1"));
    }

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    }


    @Test
    public void weightedLinks()
    {
        Item customer0 = new Item(database, "customer0");
        customer0.linkTo("product7", 5);
        customer0.save();


        customer0 = new Item(database, "customer0");
        assertTrue(customer0.getLinks("").containsKey("product7"));
        assertEquals((int) customer0.getLinks("").get("product7"), 5);
        assertEquals(customer0.weightFor("product7"), 5);


        customer0.unlinkFrom("product7");
        customer0.save();
        customer0 = new Item(database, "customer0");
        assertFalse(customer0.getLinks("").containsKey("product7"));
    }

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    }


    @Test(expected = IllegalArgumentException.class)
    public void weightedLinksUpperLimit()
    {
        Item customer = new Item(database, "customer0");
        Item product = new Item(database, "product0");
        customer.linkTo(product, 11);
    }

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