Examples of org.apache.commons.configuration2.tree.ModelTransaction

Package org.apache.commons.configuration2.tree

Examples of org.apache.commons.configuration2.tree.ModelTransaction

org.apache.commons.configuration2.io.FileHandler
An internally used helper class for an atomic update of an {@link InMemoryNodeModel}.

This class performs updates on the node structure of a node model consisting of {@link ImmutableNode} objects. Because the nodes themselves cannot bechanged updates are achieved by replacing parts of the structure with new nodes; the new nodes are copies of original nodes with the corresponding manipulations applied. Therefore, each update of a node in the structure results in a new structure in which the affected node is replaced by a new one, and this change bubbles up to the root node (because all parent nodes have to be replaced by instances with an updated child reference).

A single update of a model may consist of multiple changes on nodes. For instance, a remove property operation can include many nodes. There are some reasons why such updates should be handled in a single "transaction" rather than executing them on altered node structures one by one:
- An operation is typically executed on a set of source nodes from the original node hierarchy. While manipulating nodes, nodes of this set may be replaced by new ones. The handling of these replacements complicates things a lot.
- Performing all updates one after the other may cause more updates of nodes than necessary. Nodes near to the root node always have to be replaced when a child of them gets manipulated. If all these updates are deferred and handled in a single transaction, the resulting operation is more efficient.
@version $Id: ModelTransaction.java 1624601 2014-09-12 18:04:36Z oheger $

    }


    @Override
    public <T> T to(Object src, Class<T> targetCls, ConfigurationInterpolator ci)
    {
        ConfigurationInterpolator interpolator = fetchInterpolator(ci);
        return convert(interpolator.interpolate(src), targetCls, interpolator);
    }

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        if (isEmptyElement(src))
        {
            return Array.newInstance(elemClass, 0);
        }


        ConfigurationInterpolator interpolator = fetchInterpolator(ci);
        return elemClass.isPrimitive() ? toPrimitiveArray(src, elemClass,
                interpolator) : toObjectArray(src, elemClass, interpolator);
    }

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                    "Target collection must not be null!");
        }


        if (src != null && !isEmptyElement(src))
        {
            ConfigurationInterpolator interpolator = fetchInterpolator(ci);
            convertToCollection(src, elemClass, interpolator, dest);
        }
    }

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    @Override
    public final void installInterpolator(
            Map<String, ? extends Lookup> prefixLookups,
            Collection<? extends Lookup> defLookups)
    {
        InterpolatorSpecification spec =
                new InterpolatorSpecification.Builder()
                        .withPrefixLookups(prefixLookups)
                        .withDefaultLookups(defLookups)
                        .withDefaultLookup(new ConfigurationLookup(this))
                        .create();

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        parent.addProperty("tablespaces.tablespace.name", "default");
        parent.addProperty("tablespaces.tablespace(-1).name", "test");
        parent.addProperty("tables.table(0).var", "${brackets:x}");


        ConfigurationInterpolator interpolator = parent.getInterpolator();
        interpolator.registerLookup("brackets", new Lookup() {


            public String lookup(String key) {
                return "(" + key + ")";
            }

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        do
        {
            ConfigurationInterpolator ciOld = getInterpolator();
            ConfigurationInterpolator ciNew =
                    (ciOld != null) ? ciOld : new ConfigurationInterpolator();
            Lookup confLookup = findConfigurationLookup(ciNew);
            if (confLookup == null)
            {
                confLookup = new ConfigurationLookup(this);
            }
            else

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    protected void cloneInterpolator(AbstractConfiguration orgConfig)
    {
        interpolator = new AtomicReference<ConfigurationInterpolator>();
        ConfigurationInterpolator orgInterpolator = orgConfig.getInterpolator();
        List<Lookup> defaultLookups = orgInterpolator.getDefaultLookups();
        Lookup lookup = findConfigurationLookup(orgInterpolator, orgConfig);
        if (lookup != null)
        {
            defaultLookups.remove(lookup);
        }

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    @Before
    public void setUp() throws Exception
    {
        // any concrete class will do
        PropertiesConfiguration c = new PropertiesConfiguration();
        new FileHandler(c).load(ConfigurationAssert
                .getTestFile("test.properties"));
        sync = new SynchronizerTestImpl();
        c.setSynchronizer(sync);
        config = c;
    }

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    @Before
    public void setUp() throws Exception
    {
        CompositeConfiguration cc = new CompositeConfiguration();
        PropertiesConfiguration pc = new PropertiesConfiguration();
        FileHandler handler = new FileHandler(pc);
        handler.setFileName(testProperties);
        handler.load();
        cc.addConfiguration(pc);
        conf = cc;
        nonStringTestHolder.setConfiguration(conf);
    }

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    @Before
    public void setUp() throws Exception
    {
        XMLConfiguration c = new XMLConfiguration();
        testFile = ConfigurationAssert.getTestFile("test.xml");
        new FileHandler(c).load(testFile);
        sync = new SynchronizerTestImpl();
        c.setSynchronizer(sync);
        config = c;
    }

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