Examples with ContextFunction org.eclipse.e4.core.contexts.ContextFunction used on opensource projects

Example 11 with ContextFunction

use of org.eclipse.e4.core.contexts.ContextFunction in project eclipse.platform.runtime by eclipse.

the class ContextFunctionDynamicsTest method testBug315109.

@Test
public void testBug315109() throws Exception {
    IEclipseContext appContext = EclipseContextFactory.create();
    IEclipseContext windowContext = appContext.createChild();
    IEclipseContext partContext = windowContext.createChild();
    partContext.activateBranch();
    appContext.set(SELECTION, new ContextFunction() {

        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            IEclipseContext parent = context.getParent();
            while (parent != null) {
                context = parent;
                parent = context.getParent();
            }
            return context.getActiveLeaf().get("out.selection");
        }
    });
    InjectTarget target = new InjectTarget();
    ContextInjectionFactory.inject(target, partContext);
    // $NON-NLS-1$
    assertNull("No selection has been set, should be null", target.input);
    Object o = new Object();
    windowContext.set(SELECTION, o);
    assertEquals(// $NON-NLS-1$
    "A selection was set into the window, should have been injected into the part", o, target.input);
}

Example 12 with ContextFunction

use of org.eclipse.e4.core.contexts.ContextFunction in project eclipse.platform.runtime by eclipse.

the class ContextFunctionDynamicsTest method testOverrideICF.

/**
 * Overriding context function with a regular value on a child node
 */
@Test
public void testOverrideICF() {
    IEclipseContext context1 = EclipseContextFactory.create("context1");
    IEclipseContext context2 = context1.createChild("context2");
    IEclipseContext context3 = context2.createChild("context3");
    context1.set(SELECTION, new ContextFunction() {

        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            return "func1";
        }
    });
    InjectTarget target = new InjectTarget();
    ContextInjectionFactory.inject(target, context3);
    assertEquals("func1", target.input);
    Object o = new Object();
    context2.set(SELECTION, o);
    assertEquals(o, target.input);
}

Example 13 with ContextFunction

use of org.eclipse.e4.core.contexts.ContextFunction in project eclipse.platform.runtime by eclipse.

the class ContextFunctionDynamicsTest method testLongChain.

/**
 * Tests updates in a chain of 4 contexts
 */
@Test
public void testLongChain() {
    IEclipseContext context1 = EclipseContextFactory.create("context1");
    IEclipseContext context2 = context1.createChild("context2");
    IEclipseContext context3 = context2.createChild("context3");
    IEclipseContext context4 = context3.createChild("context4");
    // ICF set on top context
    context1.set(SELECTION, new ContextFunction() {

        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            return "func1";
        }
    });
    InjectTarget target = new InjectTarget();
    ContextInjectionFactory.inject(target, context4);
    assertEquals("func1", target.input);
    // Override ICF set on the 2nd context
    context2.set(SELECTION, new ContextFunction() {

        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            return "func2";
        }
    });
    assertEquals("func2", target.input);
    // Override removed
    context2.remove(SELECTION);
    assertEquals("func1", target.input);
    // Override simple value set on 3rd context
    context3.set(SELECTION, "abc");
    assertEquals("abc", target.input);
    // Simple value override removed from 3rd context
    context3.remove(SELECTION);
    assertEquals("func1", target.input);
}

Example 14 with ContextFunction

use of org.eclipse.e4.core.contexts.ContextFunction in project eclipse.platform.runtime by eclipse.

the class EclipseContextTest method testGetCFNotAValue.

@Test
public void testGetCFNotAValue() {
    IEclipseContext context = EclipseContextFactory.create("ParentContext");
    context.set("x", new ContextFunction() {

        /*
			 * (non-Javadoc)
			 *
			 * @see
			 * org.eclipse.e4.core.contexts.ContextFunction#compute(org.eclipse
			 * .e4.core.contexts.IEclipseContext, java.lang.String)
			 */
        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            return IInjector.NOT_A_VALUE;
        }
    });
    // must call several times as the underlying ValueComputation wrapper is
    // created on the first time, but re-used for subsequent calls.
    assertNull(context.get("x"));
    assertNull(context.get("x"));
    assertNull(context.get("x"));
    context.dispose();
}

Example 15 with ContextFunction

use of org.eclipse.e4.core.contexts.ContextFunction in project eclipse.platform.runtime by eclipse.

the class EclipseContextTest method testGetCFNotAValueToParent.

@Test
public void testGetCFNotAValueToParent() {
    IEclipseContext parent = EclipseContextFactory.create("ParentContext");
    IEclipseContext child = parent.createChild();
    parent.set("x", Integer.valueOf(1));
    child.set("x", new ContextFunction() {

        /*
			 * (non-Javadoc)
			 *
			 * @see
			 * org.eclipse.e4.core.contexts.ContextFunction#compute(org.eclipse
			 * .e4.core.contexts.IEclipseContext, java.lang.String)
			 */
        @Override
        public Object compute(IEclipseContext context, String contextKey) {
            return IInjector.NOT_A_VALUE;
        }
    });
    assertEquals(1, child.get("x"));
    parent.dispose();
}