| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.bval.jsr.util; |
| |
| import java.io.Serializable; |
| import java.util.Comparator; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Objects; |
| |
| import javax.validation.Path; |
| |
| import org.apache.bval.util.Comparators; |
| import org.apache.bval.util.Exceptions; |
| |
| /** |
| * Description: object holding the property path as a list of nodes. (Implementation partially based on reference |
| * implementation) <br/> |
| * This class is not synchronized. |
| * |
| * @version $Rev: 1498347 $ $Date: 2013-07-01 12:06:18 +0200 (lun., 01 juil. 2013) $ |
| */ |
| public class PathImpl implements Path, Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * @see NodeImpl#NODE_COMPARATOR |
| */ |
| public static final Comparator<Path> PATH_COMPARATOR = Comparators.comparingIterables(NodeImpl.NODE_COMPARATOR); |
| |
| static final String PROPERTY_PATH_SEPARATOR = "."; |
| |
| /** |
| * Builds non-root paths from expressions. |
| */ |
| public static class Builder implements PathNavigation.Callback<PathImpl> { |
| private final PathImpl result = PathImpl.create(); |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void handleProperty(String name) { |
| result.addProperty(name); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void handleIndexOrKey(String value) { |
| // with no context to guide us, we can only parse ints and fall back to String keys: |
| NodeImpl node; |
| try { |
| node = NodeImpl.atIndex(Integer.parseInt(value)); |
| } catch (NumberFormatException e) { |
| node = NodeImpl.atKey(value); |
| } |
| result.addNode(node); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public PathImpl result() { |
| return result; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void handleGenericInIterable() { |
| result.addNode(NodeImpl.atIndex(null)); |
| } |
| } |
| |
| /** |
| * Returns a {@code Path} instance representing the path described by the given string. To create a root node the |
| * empty string should be passed. Note: This signature is to maintain pluggability with the RI impl. |
| * |
| * @param propertyPath |
| * the path as string representation. |
| * @return a {@code Path} instance representing the path described by the given string. |
| */ |
| public static PathImpl createPathFromString(String propertyPath) { |
| if (propertyPath == null || propertyPath.isEmpty()) { |
| return create(); |
| } |
| return PathNavigation.navigateAndReturn(propertyPath, new Builder()); |
| } |
| |
| /** |
| * Create a {@link PathImpl} instance representing the specified path. |
| * |
| * @return PathImpl |
| */ |
| public static PathImpl create() { |
| final PathImpl path = new PathImpl(); |
| final NodeImpl node = new NodeImpl.BeanNodeImpl(); |
| path.addNode(node); |
| return path; |
| } |
| |
| /** |
| * Copy another Path. |
| * |
| * @param path |
| * @return new {@link PathImpl} |
| */ |
| public static PathImpl copy(Path path) { |
| return path == null ? null : new PathImpl(path); |
| } |
| |
| public static PathImpl of(Path path) { |
| return path instanceof PathImpl ? (PathImpl) path : copy(path); |
| } |
| |
| private static NodeImpl newNode(final Node cast) { |
| if (BeanNode.class.isInstance(cast)) { |
| return new NodeImpl.BeanNodeImpl(cast); |
| } |
| if (MethodNode.class.isInstance(cast)) { |
| return new NodeImpl.MethodNodeImpl(cast); |
| } |
| if (ConstructorNode.class.isInstance(cast)) { |
| return new NodeImpl.ConstructorNodeImpl(cast); |
| } |
| if (ReturnValueNode.class.isInstance(cast)) { |
| return new NodeImpl.ReturnValueNodeImpl(cast); |
| } |
| if (ParameterNode.class.isInstance(cast)) { |
| return new NodeImpl.ParameterNodeImpl(cast); |
| } |
| if (CrossParameterNode.class.isInstance(cast)) { |
| return new NodeImpl.CrossParameterNodeImpl(cast); |
| } |
| if (ContainerElementNode.class.isInstance(cast)) { |
| return new NodeImpl.ContainerElementNodeImpl(cast); |
| } |
| return new NodeImpl.PropertyNodeImpl(cast); |
| } |
| |
| private static boolean isAwaitingPropertyName(NodeImpl n) { |
| return n != null && n.getName() == null && (n.isInIterable() || n.getContainerClass() != null); |
| } |
| |
| private final LinkedList<NodeImpl> nodeList = new LinkedList<>(); |
| |
| private PathImpl() { |
| } |
| |
| private PathImpl(Iterable<? extends Node> nodes) { |
| nodes.forEach(n -> nodeList.add(newNode(n))); |
| } |
| |
| /** |
| * Learn whether this {@link PathImpl} points to the root of its graph. |
| * |
| * @return true if no child nodes |
| */ |
| // our implementation stores a nameless root node. |
| public boolean isRootPath() { |
| if (nodeList.size() != 1) { |
| return false; |
| } |
| final Path.Node first = nodeList.peekFirst(); |
| return !first.isInIterable() && first.getName() == null; |
| } |
| |
| /** |
| * Add a node to this {@link PathImpl}. |
| * |
| * @param node |
| * to add |
| * @return {@code this}, fluently |
| */ |
| public PathImpl addNode(Node node) { |
| final NodeImpl impl = node instanceof NodeImpl ? (NodeImpl) node : newNode(node); |
| if (isRootPath()) { |
| nodeList.pop(); |
| } |
| nodeList.add(impl); |
| return this; |
| } |
| |
| /** |
| * Encapsulate the node manipulations needed to add a named property to this path. |
| * |
| * @param name |
| * @return {@code this}, fluently |
| */ |
| public PathImpl addProperty(String name) { |
| if (!nodeList.isEmpty()) { |
| NodeImpl leaf = getLeafNode(); |
| if (isAwaitingPropertyName(leaf)) { |
| if (!PropertyNode.class.isInstance(leaf)) { |
| final NodeImpl tmp = new NodeImpl.PropertyNodeImpl(leaf); |
| removeLeafNode(); |
| addNode(tmp); |
| leaf = tmp; |
| } |
| leaf.setName(name); |
| return this; |
| } |
| } |
| return addNode(new NodeImpl.PropertyNodeImpl(name)); |
| } |
| |
| public PathImpl addBean() { |
| final NodeImpl.BeanNodeImpl node; |
| if (!nodeList.isEmpty() && isAwaitingPropertyName(getLeafNode())) { |
| node = new NodeImpl.BeanNodeImpl(removeLeafNode()); |
| } else { |
| node = new NodeImpl.BeanNodeImpl(); |
| } |
| return addNode(node); |
| } |
| |
| /** |
| * Trim the leaf node from this {@link PathImpl}. |
| * |
| * @return the node removed |
| * @throws IllegalStateException |
| * if no nodes are found |
| */ |
| public NodeImpl removeLeafNode() { |
| Exceptions.raiseIf(isRootPath() || nodeList.isEmpty(), IllegalStateException::new, "No nodes in path!"); |
| |
| try { |
| return nodeList.removeLast(); |
| } finally { |
| if (nodeList.isEmpty()) { |
| nodeList.add(new NodeImpl.BeanNodeImpl()); |
| } |
| } |
| } |
| |
| /** |
| * Get the leaf node (if any) from this {@link PathImpl} |
| * |
| * @return {@link NodeImpl} |
| */ |
| public NodeImpl getLeafNode() { |
| if (nodeList.isEmpty()) { |
| return null; |
| } |
| return nodeList.peekLast(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public Iterator<Path.Node> iterator() { |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| final Iterator<Path.Node> result = ((List) nodeList).iterator(); |
| return result; |
| } |
| |
| /** |
| * Learn whether <code>path</code> is a parent to <code>this</code>. |
| * |
| * @param path |
| * @return <code>true</code> if our nodes begin with nodes equal to those found in <code>path</code> |
| */ |
| public boolean isSubPathOf(Path path) { |
| if (path instanceof PathImpl && ((PathImpl) path).isRootPath()) { |
| return true; |
| } |
| final Iterator<Node> pathIter = path.iterator(); |
| final Iterator<Node> thisIter = iterator(); |
| while (pathIter.hasNext()) { |
| final Node pathNode = pathIter.next(); |
| if (!thisIter.hasNext()) { |
| return false; |
| } |
| final Node thisNode = thisIter.next(); |
| if (pathNode.isInIterable()) { |
| if (!thisNode.isInIterable()) { |
| return false; |
| } |
| if (pathNode.getIndex() != null && !pathNode.getIndex().equals(thisNode.getIndex())) { |
| return false; |
| } |
| if (pathNode.getKey() != null && !pathNode.getKey().equals(thisNode.getKey())) { |
| return false; |
| } |
| } else if (thisNode.isInIterable()) { |
| // in this case we have shown that the proposed parent is not |
| // indexed, and we are, thus the paths cannot match |
| return false; |
| } |
| if (pathNode.getName() == null || pathNode.getName().equals(thisNode.getName())) { |
| continue; |
| } |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String toString() { |
| final StringBuilder builder = new StringBuilder(); |
| for (Path.Node node : this) { |
| NodeImpl.appendNode(node, builder); |
| } |
| return builder.toString(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || !getClass().equals(o.getClass())) { |
| return false; |
| } |
| return Objects.equals(nodeList, ((PathImpl) o).nodeList); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(nodeList); |
| } |
| } |