Examples with ICountable org.eclipse.core.expressions.ICountable used on opensource projects

Example 1 with ICountable

use of org.eclipse.core.expressions.ICountable in project eclipse.platform.runtime by eclipse.

the class CountExpression method evaluate.

@Override
public EvaluationResult evaluate(IEvaluationContext context) throws CoreException {
    Object var = context.getDefaultVariable();
    int size;
    if (var instanceof Collection) {
        size = ((Collection<?>) var).size();
    } else {
        ICountable countable = Expressions.getAsICountable(var, this);
        if (countable == null)
            return EvaluationResult.NOT_LOADED;
        size = countable.count();
    }
    switch(fMode) {
        case UNKNOWN:
            return EvaluationResult.FALSE;
        case NONE:
            return EvaluationResult.valueOf(size == 0);
        case NONE_OR_ONE:
            return EvaluationResult.valueOf(size == 0 || size == 1);
        case ONE_OR_MORE:
            return EvaluationResult.valueOf(size >= 1);
        case EXACT:
            return EvaluationResult.valueOf(fSize == size);
        case ANY_NUMBER:
            return EvaluationResult.TRUE;
        case LESS_THAN:
            return EvaluationResult.valueOf(size < fSize);
        case GREATER_THAN:
            return EvaluationResult.valueOf(size > fSize);
    }
    return EvaluationResult.FALSE;
}

Example 2 with ICountable

use of org.eclipse.core.expressions.ICountable in project eclipse.platform.runtime by eclipse.

the class Expressions method getAsICountable.

/**
 * Converts the given variable into an <code>ICountable</code>. If a corresponding adapter can't be found an
 * exception is thrown. If the corresponding adapter isn't loaded yet, <code>null</code> is returned.
 *
 * @param var the variable to turn into an <code>ICountable</code>
 * @param expression the expression referring to the variable
 *
 * @return the <code>ICountable</code> or <code>null<code> if a corresponding adapter isn't loaded yet
 *
 * @throws CoreException if the var can't be adapted to an <code>ICountable</code>
 */
public static ICountable getAsICountable(Object var, Expression expression) throws CoreException {
    if (var instanceof ICountable) {
        return (ICountable) var;
    } else {
        IAdapterManager manager = Platform.getAdapterManager();
        ICountable result = manager.getAdapter(var, ICountable.class);
        if (result != null)
            return result;
        if (manager.queryAdapter(var, ICountable.class.getName()) == IAdapterManager.NOT_LOADED)
            return null;
        throw new CoreException(new ExpressionStatus(ExpressionStatus.VARIABLE_IS_NOT_A_COLLECTION, Messages.format(ExpressionMessages.Expression_variable_not_countable, expression.toString())));
    }
}