Example usage for org.apache.commons.lang3 ObjectUtils NULL

List of usage examples for org.apache.commons.lang3 ObjectUtils NULL

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In this page you can find the example usage for org.apache.commons.lang3 ObjectUtils NULL.

Prototype

Null NULL

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Document

Singleton used as a null placeholder where null has another meaning.

For example, in a HashMap the java.util.HashMap#get(java.lang.Object) method returns null if the Map contains null or if there is no matching key.

Usage

From source file:com.ebuddy.cassandra.structure.DecomposerTest.java

@Test(groups = "unit")
public void decomposeSimpleObjectsWithSimplePaths() throws Exception {
    Map<Path, Object> structures = new HashMap<Path, Object>();
    structures.put(DefaultPath.fromStrings("x"), "");
    structures.put(DefaultPath.fromStrings("y"), 42);
    structures.put(DefaultPath.fromStrings("z"), true);
    structures.put(DefaultPath.fromStrings("N"), null);

    Map<Path, Object> result = decomposer.decompose(structures);

    assertNotSame(result, structures);//from   w  w w .j  a  v  a 2  s  .  com

    // output of only simple objects is still equal to the input
    // with one exception, nulls are replaced by the NULL token
    structures.put(DefaultPath.fromStrings("N"), ObjectUtils.NULL);
    assertEquals(result, structures);
}

From source file:com.ebuddy.cassandra.structure.DecomposerTest.java

@Test(groups = "unit")
public void decomposeSimpleObjectsWithLongerPaths() throws Exception {
    Map<Path, Object> structures = new HashMap<Path, Object>();
    structures.put(DefaultPath.fromEncodedPathString("a/b@/c"), "");
    structures.put(DefaultPath.fromEncodedPathString("d/e#/f"), 42);
    structures.put(DefaultPath.fromEncodedPathString("g/h/i"), true);
    structures.put(DefaultPath.fromEncodedPathString("j/k/l"), null);

    Map<Path, Object> result = decomposer.decompose(structures);

    assertNotSame(result, structures);//from w w  w . ja va 2 s . co m

    // output of only simple objects is equal to the input
    //  except nulls are replaced by the NULL token.
    //  Note that the special characters are not URL-encoded in input paths  
    structures.put(DefaultPath.fromEncodedPathString("j/k/l"), ObjectUtils.NULL);
    assertEquals(result, structures);
}

From source file:edu.umich.flowfence.service.SandboxManager.java

public synchronized int setMaxHotSpare(int count) {
    int oldCount = mMaxHotSpares;
    int newCount = Math.max(mMinHotSpares, Math.min(count, SANDBOX_COUNT));
    Log.i(TAG, "Changing max hot spares from " + oldCount + " to " + newCount);
    dumpSandboxes();//from w ww .j  a v a2s .  co  m

    mMaxHotSpares = newCount;
    while (mHotSpares.size() > mMaxHotSpares) {
        mIdleSandboxes.put(mHotSpares.remove(), ObjectUtils.NULL);
    }
    trimIdle();

    return oldCount;
}

From source file:edu.umich.flowfence.service.SandboxManager.java

public synchronized Sandbox tryGetSandboxById(final int id, final CallRecord record) {
    final Sandbox sb = Sandbox.get(id);
    if (localLOGD) {
        Log.d(TAG, "getSandboxById " + sb);
    }/*w  ww  .j a v a2 s .  c  o m*/
    if (mRunningSandboxes.contains(sb)) {
        Log.i(TAG, "Explicitly requested sandbox " + sb + " busy");
        return null;
    }

    if (mStoppedSandboxes.remove(sb)) {
        sb.start(this);
    }
    if (mHotSpares.remove(sb)) {
        refillHotSpares();
    }
    // Put into mIdleSandboxes temporarily, beginExecution expects it.
    mIdleSandboxes.put(sb, ObjectUtils.NULL);

    if (record != null) {
        String packageName = record.getQM().getDescriptor().definingClass.getPackageName();
        String assignedName = sb.getAssignedPackage();
        if ((assignedName != null && !assignedName.equals(packageName))
                || !record.getInboundTaints().isSubsetOf(sb.getTaints())) {
            // We need to restart this sandbox for security reasons.
            Log.i(TAG, "Restarting " + sb + " for explicit request");
            sb.restart();
        }
    }

    return sb;
}

From source file:edu.umich.oasis.service.SandboxManager.java

public synchronized Sandbox tryGetSandboxById(final int id, final CallRecord record) {
    final Sandbox sb = Sandbox.get(id);
    if (localLOGD) {
        Log.d(TAG, "getSandboxById " + sb);
    }/*  ww  w  .jav  a2  s . c om*/
    if (mRunningSandboxes.contains(sb)) {
        Log.i(TAG, "Explicitly requested sandbox " + sb + " busy");
        return null;
    }

    if (mStoppedSandboxes.remove(sb)) {
        sb.start(this);
    }
    if (mHotSpares.remove(sb)) {
        refillHotSpares();
    }
    // Put into mIdleSandboxes temporarily, beginExecution expects it.
    mIdleSandboxes.put(sb, ObjectUtils.NULL);

    if (record != null) {
        String packageName = record.getSODA().getDescriptor().definingClass.getPackageName();
        String assignedName = sb.getAssignedPackage();
        if ((assignedName != null && !assignedName.equals(packageName))
                || !record.getInboundTaints().isSubsetOf(sb.getTaints())) {
            // We need to restart this sandbox for security reasons.
            Log.i(TAG, "Restarting " + sb + " for explicit request");
            sb.restart();
        }
    }

    return sb;
}

From source file:edu.umich.flowfence.service.NamespaceSharedPrefs.java

public void registerOnNamespacePreferenceChangedListener(OnNamespacePreferenceChangeListener listener) {
    synchronized (mListenerMap) {
        mListenerMap.put(listener, ObjectUtils.NULL);
    }/*from  w ww  .jav a  2 s.c o m*/
}

From source file:edu.umich.flowfence.service.SandboxManager.java

public void putSandbox(Sandbox sb) {
    Map<AsyncCallback, Sandbox> callbacks;
    synchronized (this) {
        if (!mRunningSandboxes.remove(sb)) {
            Log.w(TAG, "Put non-running sandbox " + sb);
            return;
        }/*from w w w.j  a  v a 2s  .c o m*/

        sb.stop(mExecutionReferenceKey);

        if (localLOGD) {
            Log.d(TAG, "putSandbox " + sb);
        }

        // This was a trimmed sandbox. Let it go out of circulation.
        if (sb.getID() >= mMaxCount) {
            sb.stop(this);
            return;
        }

        mIdleSandboxes.put(sb, ObjectUtils.NULL);

        refillHotSpares();
        trimIdle();

        callbacks = tryExecuteQueueLocked();
    }

    tryExecuteQueueUnlocked(callbacks);
}

From source file:org.amanzi.awe.distribution.ui.wrappers.DistributionWrapperFactory.java

@Override
public Iterator<ITreeWrapper> getWrappers(final Object parent) {
    Iterator<ITreeWrapper> result = null;

    try {/*from   w  w w .  java 2 s  .  com*/
        IProjectModel projectModel = null;
        IPropertyStatisticalModel sourceModel = null;

        if (parent != null) {
            if (parent.equals(ObjectUtils.NULL)) {
                projectModel = projectModelProvider.getActiveProjectModel();
            } else if (parent instanceof IUIItem) {
                sourceModel = ((IUIItem) parent).castChild(IPropertyStatisticalModel.class);
            }
        }

        Iterator<IDistributionModel> modelIterator = null;

        if (projectModel != null) {
            modelIterator = new DistributionModelIterator(getSourceModelIterator(projectModel));
        } else if (sourceModel != null) {
            modelIterator = distributionModelProvider.findAll(sourceModel);
        }

        if (modelIterator != null) {
            result = new DistributionWrapperIterator(modelIterator);
        }
    } catch (final ModelException e) {
        LOGGER.error("Error on collecting Tree Wrappers", e);
    }
    return result;
}

From source file:org.amanzi.awe.statistics.ui.wrapper.StatisticsWrapperFactory.java

@Override
public Iterator<ITreeWrapper> getWrappers(final Object parent) {
    Iterator<ITreeWrapper> result = null;

    try {/*from  w  ww. j  av a  2s .  co m*/
        IProjectModel projectModel = null;
        IMeasurementModel sourceModel = null;

        if (parent != null) {
            if (parent.equals(ObjectUtils.NULL)) {
                projectModel = projectModelProvider.getActiveProjectModel();
            } else if (parent instanceof IUIItem) {
                sourceModel = ((IUIItem) parent).castChild(IMeasurementModel.class);
            }
        }

        Iterator<IStatisticsModel> modelIterator = null;

        if (projectModel != null) {
            modelIterator = new StatisticsModelIterator(getMeasurementModelIterator(projectModel));
        } else if (sourceModel != null) {
            modelIterator = getStatisticsModelsIterator(sourceModel);
        }

        if (modelIterator != null) {
            result = new StatisticsWrapperIterator(modelIterator);
        }
    } catch (final ModelException e) {
        LOGGER.error("Error on collecting Tree Wrappers", e);
    }
    return result;
}

From source file:org.amanzi.awe.ui.tree.view.AbstractAWETreeView.java

protected TreeViewer createTreeViewer(final Composite parent) {
    final TreeViewer treeViewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.VIRTUAL);

    treeViewer.setContentProvider(createContentProvider());
    treeViewer.setLabelProvider(createLabelProvider());
    treeViewer.setInput(ObjectUtils.NULL);

    parent.setLayout(new GridLayout(1, false));
    treeViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

    return treeViewer;
}