2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.data.impl.schema.tree;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.base.MoreObjects.ToStringHelper;
13 import java.util.Optional;
14 import org.eclipse.jdt.annotation.NonNull;
15 import org.eclipse.jdt.annotation.NonNullByDefault;
16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
17 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.RequiredElementCountException;
19 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
20 import org.opendaylight.yangtools.yang.model.api.ElementCountConstraint;
21 import org.opendaylight.yangtools.yang.model.api.ElementCountConstraintAware;
23 final class MinMaxElementsValidation<T extends DataSchemaNode & ElementCountConstraintAware>
24 extends AbstractValidation {
25 private final int minElements;
26 private final int maxElements;
28 private MinMaxElementsValidation(final SchemaAwareApplyOperation<T> delegate, final Integer minElements,
29 final Integer maxElements) {
31 this.minElements = minElements != null ? minElements : 0;
32 this.maxElements = maxElements != null ? maxElements : Integer.MAX_VALUE;
35 static <T extends DataSchemaNode & ElementCountConstraintAware> ModificationApplyOperation from(
36 final SchemaAwareApplyOperation<T> delegate) {
37 final Optional<ElementCountConstraint> optConstraint = delegate.getSchema().getElementCountConstraint();
38 if (!optConstraint.isPresent()) {
42 final ElementCountConstraint constraint = optConstraint.get();
43 return new MinMaxElementsValidation<>(delegate, constraint.getMinElements(), constraint.getMaxElements());
47 void enforceOnData(final NormalizedNode data) {
48 enforceOnData(data, (actual, message) -> new MinMaxElementsValidationFailedException(message));
52 void enforceOnData(final ModificationPath path, final NormalizedNode data) throws RequiredElementCountException {
53 enforceOnData(data, (actual, message) -> new RequiredElementCountException(path.toInstanceIdentifier(),
54 minElements, maxElements, actual, message));
59 interface ExceptionSupplier<T extends Exception> {
60 T get(int actual, String message);
63 private <X extends @NonNull Exception> void enforceOnData(final NormalizedNode value,
64 final ExceptionSupplier<X> exceptionSupplier) throws X {
65 checkArgument(value instanceof NormalizedNodeContainer, "Value %s is not a NormalizedNodeContainer", value);
66 final int children = ((NormalizedNodeContainer) value).size();
67 if (minElements > children) {
68 throw exceptionSupplier.get(children, value.getIdentifier()
69 + " does not have enough elements (" + children + "), needs at least " + minElements);
71 if (maxElements < children) {
72 throw exceptionSupplier.get(children, value.getIdentifier()
73 + " has too many elements (" + children + "), can have at most " + maxElements);
78 ToStringHelper addToStringAttributes(final ToStringHelper helper) {
79 return super.addToStringAttributes(helper.add("min", minElements).add("max", maxElements));