2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the terms of the Eclipse
5 * Public License v1.0 which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.data.impl.schema.tree;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Preconditions;
13 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
14 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
15 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodeContainer;
17 import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
19 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
20 import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
21 import org.opendaylight.yangtools.yang.model.api.ConstraintDefinition;
22 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
23 import org.slf4j.Logger;
24 import org.slf4j.LoggerFactory;
26 final class MinMaxElementsValidation extends SchemaAwareApplyOperation {
28 private static final Logger LOG = LoggerFactory.getLogger(MinMaxElementsValidation.class);
29 private final SchemaAwareApplyOperation delegate;
30 private final Integer minElements;
31 private final Integer maxElements;
33 private MinMaxElementsValidation(final SchemaAwareApplyOperation delegate, final Integer minElements,
34 final Integer maxElements) {
35 this.delegate = Preconditions.checkNotNull(delegate);
36 this.minElements = minElements;
37 this.maxElements = maxElements;
40 static SchemaAwareApplyOperation from(final SchemaAwareApplyOperation delegate, final DataSchemaNode schema) {
41 final ConstraintDefinition constraints = schema.getConstraints();
42 if (constraints == null || (constraints.getMinElements() == null && constraints.getMaxElements() == null)) {
45 return new MinMaxElementsValidation(delegate, constraints.getMinElements(), constraints.getMaxElements());
49 private static int findChildrenBefore(final Optional<TreeNode> current) {
50 if (current.isPresent()) {
51 return numOfChildrenFromValue(current.get().getData());
57 private static int findChildrenAfter(final ModifiedNode modification) {
58 if (modification.getWrittenValue() != null) {
59 return numOfChildrenFromValue(modification.getWrittenValue());
65 private void checkMinMaxElements(final YangInstanceIdentifier path, final NodeModification nodeMod,
66 final Optional<TreeNode> current) throws DataValidationFailedException {
67 if (!(nodeMod instanceof ModifiedNode)) {
68 LOG.debug("Could not validate {}, does not implement expected class {}", nodeMod, ModifiedNode.class);
71 final ModifiedNode modification = (ModifiedNode) nodeMod;
73 final int childrenBefore = findChildrenBefore(current);
75 final int childrenAfter = findChildrenAfter(modification);
77 final int childrenTotal = childrenBefore + childrenAfter + numOfChildrenFromChildMods(modification, current);
78 if (minElements != null && minElements > childrenTotal) {
79 throw new DataValidationFailedException(path, String.format(
80 "%s does not have enough elements (%s), needs at least %s", modification.getIdentifier(),
81 childrenTotal, minElements));
83 if (maxElements != null && maxElements < childrenTotal) {
84 throw new DataValidationFailedException(path, String.format(
85 "%s has too many elements (%s), can have at most %s", modification.getIdentifier(), childrenTotal,
90 private static int numOfChildrenFromValue(final NormalizedNode<?, ?> value) {
91 if (value instanceof NormalizedNodeContainer) {
92 return ((NormalizedNodeContainer<?, ?, ?>) value).getValue().size();
93 } else if (value instanceof UnkeyedListNode) {
94 return ((UnkeyedListNode) value).getSize();
97 throw new IllegalArgumentException(String.format(
98 "Unexpected type '%s', expected types are NormalizedNodeContainer and UnkeyedListNode",
102 private static int numOfChildrenFromChildMods(final ModifiedNode modification, final Optional<TreeNode> current) {
104 for (final ModifiedNode modChild : modification.getChildren()) {
105 switch (modChild.getOperation()) {
110 if (!current.isPresent()) {
122 throw new IllegalArgumentException("Unsupported operation type: " + modChild.getOperation());
129 protected void checkTouchApplicable(final YangInstanceIdentifier path, final NodeModification modification,
130 final Optional<TreeNode> current) throws DataValidationFailedException {
131 delegate.checkTouchApplicable(path, modification, current);
132 checkMinMaxElements(path, modification, current);
136 protected void checkMergeApplicable(final YangInstanceIdentifier path, final NodeModification modification,
137 final Optional<TreeNode> current) throws DataValidationFailedException {
138 delegate.checkMergeApplicable(path, modification, current);
139 checkMinMaxElements(path, modification, current);
143 protected void checkWriteApplicable(final YangInstanceIdentifier path, final NodeModification modification,
144 final Optional<TreeNode> current) throws DataValidationFailedException {
145 delegate.checkWriteApplicable(path, modification, current);
146 checkMinMaxElements(path, modification, current);
151 public Optional<ModificationApplyOperation> getChild(final PathArgument child) {
152 return delegate.getChild(child);
156 protected void verifyStructure(final NormalizedNode<?, ?> modification, final boolean verifyChildren) {
157 delegate.verifyStructure(modification, verifyChildren);
161 protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
162 return delegate.applyMerge(modification, currentMeta, version);
166 protected TreeNode applyTouch(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
167 return delegate.applyTouch(modification, currentMeta, version);
171 protected TreeNode applyWrite(final ModifiedNode modification, final Optional<TreeNode> currentMeta,
172 final Version version) {
173 return delegate.applyWrite(modification, currentMeta, version);
177 protected ChildTrackingPolicy getChildPolicy() {
178 return delegate.getChildPolicy();