Examples with TitanGraphIndex com.thinkaurelius.titan.core.schema.TitanGraphIndex used on opensource projects

Example 31 with TitanGraphIndex

use of com.thinkaurelius.titan.core.schema.TitanGraphIndex in project titan by thinkaurelius.

the class ManagementSystem method setTypeModifier.

private void setTypeModifier(final TitanSchemaElement element, final ModifierType modifierType, final Object value) {
    Preconditions.checkArgument(element != null, "null schema element");
    TypeDefinitionCategory cat = modifierType.getCategory();
    if (cat.hasDataType() && null != value) {
        Preconditions.checkArgument(cat.getDataType().equals(value.getClass()), "modifier value is not of expected type " + cat.getDataType());
    }
    TitanSchemaVertex typeVertex;
    if (element instanceof TitanSchemaVertex) {
        typeVertex = (TitanSchemaVertex) element;
    } else if (element instanceof TitanGraphIndex) {
        IndexType index = ((TitanGraphIndexWrapper) element).getBaseIndex();
        assert index instanceof IndexTypeWrapper;
        SchemaSource base = ((IndexTypeWrapper) index).getSchemaBase();
        typeVertex = (TitanSchemaVertex) base;
    } else
        throw new IllegalArgumentException("Invalid schema element: " + element);
    // remove any pre-existing value for the modifier, or return if an identical value has already been set
    for (TitanEdge e : typeVertex.getEdges(TypeDefinitionCategory.TYPE_MODIFIER, Direction.OUT)) {
        TitanSchemaVertex v = (TitanSchemaVertex) e.vertex(Direction.IN);
        TypeDefinitionMap def = v.getDefinition();
        Object existingValue = def.getValue(modifierType.getCategory());
        if (null != existingValue) {
            if (existingValue.equals(value)) {
                //Already has the right value, don't need to do anything
                return;
            } else {
                e.remove();
                v.remove();
            }
        }
    }
    if (null != value) {
        TypeDefinitionMap def = new TypeDefinitionMap();
        def.setValue(cat, value);
        TitanSchemaVertex cVertex = transaction.makeSchemaVertex(TitanSchemaCategory.TYPE_MODIFIER, null, def);
        addSchemaEdge(typeVertex, cVertex, TypeDefinitionCategory.TYPE_MODIFIER, null);
    }
    updateSchemaVertex(typeVertex);
    updatedTypes.add(typeVertex);
}