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UniformItemPathImpl.java
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UniformItemPathImpl.java
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/*
* Copyright (c) 2010-2018 Evolveum and contributors
*
* This work is dual-licensed under the Apache License 2.0
* and European Union Public License. See LICENSE file for details.
*/
package com.evolveum.midpoint.prism.path;
import com.evolveum.prism.xml.ns._public.types_3.ItemPathType;
import org.apache.commons.lang.Validate;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.xml.namespace.QName;
import java.util.*;
/**
* @author semancik
*
*/
class UniformItemPathImpl implements UniformItemPath {
public static final UniformItemPathImpl EMPTY_PATH = UniformItemPathImpl.createEmpty();
private static UniformItemPathImpl createEmpty() {
UniformItemPathImpl empty = new UniformItemPathImpl();
empty.segments = Collections.emptyList(); // to ensure it won't get modified in no case
return empty;
}
@NotNull private List<ItemPathSegment> segments;
private Map<String, String> namespaceMap;
@NotNull
public static UniformItemPathImpl fromItemPath(ItemPath itemPath) {
if (itemPath == null) {
return EMPTY_PATH;
} else if (itemPath instanceof UniformItemPathImpl) {
return (UniformItemPathImpl) itemPath;
} else {
return new UniformItemPathImpl(itemPath);
}
}
public void setNamespaceMap(Map<String, String> namespaceMap) {
this.namespaceMap = namespaceMap;
}
public Map<String, String> getNamespaceMap() {
return namespaceMap;
}
// use ItemPath.EMPTY_PATH from outside clients to avoid unnecessary instantiation
private UniformItemPathImpl() {
segments = new ArrayList<>(); // to provide room for growth
}
public UniformItemPathImpl(QName... qnames) {
this.segments = new ArrayList<>(qnames.length);
for (QName qname : qnames) {
add(qname);
}
}
public UniformItemPathImpl(String... names) {
this.segments = new ArrayList<>(names.length);
for (String name : names) {
add(stringToQName(name));
}
}
public UniformItemPathImpl(@NotNull ItemPath itemPath) {
if (itemPath instanceof UniformItemPathImpl) {
UniformItemPathImpl itemPathImpl = (UniformItemPathImpl) itemPath;
this.segments = new ArrayList<>(itemPathImpl.size());
this.segments.addAll(itemPathImpl.segments);
} else {
List<?> components = itemPath.getSegments();
this.segments = new ArrayList<>(); // todo
addAll(components);
}
}
public UniformItemPathImpl(Object... namesOrIdsOrSegments) {
this.segments = new ArrayList<>(namesOrIdsOrSegments.length);
addAll(namesOrIdsOrSegments);
}
private QName stringToQName(String name) {
Validate.notNull(name, "name");
switch (name) {
case ParentPathSegment.SYMBOL:
return ParentPathSegment.QNAME;
case ObjectReferencePathSegment.SYMBOL:
return ObjectReferencePathSegment.QNAME;
case IdentifierPathSegment.SYMBOL:
return IdentifierPathSegment.QNAME;
default:
return new QName(name);
}
}
public UniformItemPathImpl(UniformItemPath parentPath, QName subName) {
this.segments = new ArrayList<>(parentPath.getSegments().size()+1);
segments.addAll(parentPath.getSegments());
add(subName);
}
public UniformItemPathImpl(UniformItemPath parentPath, UniformItemPath childPath) {
this.segments = new ArrayList<>(parentPath.getSegments().size()+childPath.getSegments().size());
segments.addAll(parentPath.getSegments());
segments.addAll(childPath.getSegments());
}
public UniformItemPathImpl(List<ItemPathSegment> segments) {
this.segments = new ArrayList<>(segments.size());
this.segments.addAll(segments);
}
public UniformItemPathImpl(List<ItemPathSegment> segments, ItemPathSegment subSegment) {
this.segments = new ArrayList<>(segments.size()+1);
this.segments.addAll(segments);
this.segments.add(subSegment);
}
public UniformItemPathImpl(List<ItemPathSegment> segments, QName subName) {
this.segments = new ArrayList<>(segments.size()+1);
this.segments.addAll(segments);
add(subName);
}
public UniformItemPathImpl(List<ItemPathSegment> segments, List<ItemPathSegment> additionalSegments) {
this.segments = new ArrayList<>(segments.size()+additionalSegments.size());
this.segments.addAll(segments);
this.segments.addAll(additionalSegments);
}
public UniformItemPathImpl(ItemPathSegment... segments) {
this.segments = new ArrayList<>(segments.length);
Collections.addAll(this.segments, segments);
}
public UniformItemPathImpl(UniformItemPath parentPath, ItemPathSegment subSegment) {
this.segments = new ArrayList<>(parentPath.getSegments().size() + 1);
this.segments.addAll(parentPath.getSegments());
this.segments.add(subSegment);
}
@NotNull
public UniformItemPath append(Object... components) {
return new UniformItemPathImpl(segments, components);
}
public UniformItemPath append(Long id) {
return append(new IdItemPathSegment(id));
}
public UniformItemPath append(ItemPathSegment subSegment) {
return new UniformItemPathImpl(segments, subSegment);
}
public UniformItemPath append(UniformItemPath subPath) {
UniformItemPathImpl newPath = new UniformItemPathImpl(segments);
newPath.segments.addAll(subPath.getSegments());
return newPath;
}
private void addAll(Collection<?> objects) {
for (Object object : objects) {
add(object);
}
}
private void addAll(Object[] objects) {
for (Object object : objects) {
add(object);
}
}
private void add(Object object) {
if (object instanceof UniformItemPathImpl) {
segments.addAll(((UniformItemPathImpl) object).segments);
} else if (object instanceof ItemPath) {
addAll(((ItemPath) object).getSegments());
} else if (object instanceof ItemPathSegment) {
add((ItemPathSegment) object);
} else if (object instanceof QName) {
add((QName) object);
} else if (object instanceof String) {
add(stringToQName((String) object));
} else if (object == null || object instanceof Long) {
this.segments.add(new IdItemPathSegment((Long) object));
} else if (object instanceof Integer) {
this.segments.add(new IdItemPathSegment(((Integer) object).longValue()));
} else if (object instanceof Collection) {
addAll((Collection<?>) object);
} else if (object instanceof Object[]) { // todo what about other kinds of array ?
addAll((Object[]) object);
} else {
throw new IllegalArgumentException("Invalid item path segment value: " + object);
}
}
private void add(QName qname) {
this.segments.add(UniformItemPath.createSegment(qname, false));
}
private void add(ItemPathSegment segment) {
this.segments.add(segment);
}
@NotNull
public List<ItemPathSegment> getSegments() {
return segments;
}
public ItemPathSegment first() {
if (segments.isEmpty()) {
return null;
}
return segments.get(0);
}
@NotNull
public UniformItemPath rest() {
return rest(1);
}
@NotNull
@Override
public UniformItemPath rest(int n) {
if (n == 0) {
return this;
} else if (segments.size() < n) {
return EMPTY_PATH;
} else {
return subPath(n, size());
}
}
@NotNull
public UniformItemPath tail(int n) {
return rest(n);
}
private NameItemPathSegment lastNamed() {
for (int i = segments.size()-1; i >= 0; i--) {
if (segments.get(i) instanceof NameItemPathSegment) {
return (NameItemPathSegment) segments.get(i);
}
}
return null;
}
@Nullable
public ItemPathSegment last() {
if (segments.size() == 0) {
return null;
}
return segments.get(segments.size()-1);
}
public UniformItemPath firstAsPath() {
return new UniformItemPathImpl(first());
}
@NotNull
public UniformItemPath allExceptLast() {
return subPath(0, segments.size()-1);
}
@NotNull
public UniformItemPath allUpToLastName() {
return subPath(0, lastNameIndex());
}
public UniformItemPath allUpToIncluding(int i) {
return subPath(0, i+1);
}
public int size() {
return segments.size();
}
public boolean isEmpty() {
return segments.isEmpty();
}
/**
* Makes the path "normal" by inserting null Id segments where they were omitted.
*/
public UniformItemPathImpl normalize() {
UniformItemPathImpl normalizedPath = new UniformItemPathImpl();
ItemPathSegment lastSegment = null;
Iterator<ItemPathSegment> iterator = segments.iterator();
while (iterator.hasNext()) {
ItemPathSegment origSegment = iterator.next();
if (lastSegment != null && !(lastSegment instanceof IdItemPathSegment) &&
!(origSegment instanceof IdItemPathSegment)) {
normalizedPath.segments.add(new IdItemPathSegment());
}
normalizedPath.segments.add(origSegment);
lastSegment = origSegment;
}
if (lastSegment != null && !(lastSegment instanceof IdItemPathSegment) &&
// Make sure we do not insert the Id segment as a last one. That is not correct and it would spoil comparing paths
iterator.hasNext()) {
normalizedPath.segments.add(new IdItemPathSegment());
}
return normalizedPath;
}
@NotNull
public UniformItemPath removeIds() {
UniformItemPathImpl rv = new UniformItemPathImpl();
for (ItemPathSegment segment : segments) {
if (!(segment instanceof IdItemPathSegment)) {
rv.add(segment);
}
}
return rv;
}
@NotNull
public UniformItemPath namedSegmentsOnly() {
UniformItemPathImpl rv = new UniformItemPathImpl();
for (ItemPathSegment segment : segments) {
if (segment instanceof NameItemPathSegment) {
rv.add(((NameItemPathSegment) segment).getName());
}
}
return rv;
}
@NotNull
public UniformItemPath stripVariableSegment() {
return startsWithVariable() ? rest() : this;
}
public UniformItemPath append(QName childName) {
return new UniformItemPathImpl(this, childName);
}
public UniformItemPath remainder(ItemPath prefix) {
return new UniformItemPathImpl(ItemPathComparatorUtil.remainder(this, prefix));
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + segments.hashCode();
return result;
}
/**
* More strict version of ItemPath comparison. Does not use any normalization
* nor approximate matching QNames via QNameUtil.match.
*
* For semantic-level comparison, please use equivalent(..) method.
*/
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
UniformItemPathImpl other = (UniformItemPathImpl) obj;
if (!segments.equals(other.segments)) return false;
return true;
}
public UniformItemPath clone() {
UniformItemPathImpl clone = new UniformItemPathImpl();
for (ItemPathSegment segment : segments) {
clone.segments.add(segment.clone());
}
if (namespaceMap != null) {
clone.namespaceMap = new HashMap<>(namespaceMap);
}
return clone;
}
public ItemPathType asItemPathType() {
return new ItemPathType(this);
}
@Override
public ItemName lastName() {
NameItemPathSegment lastNamed = lastNamed();
return lastNamed != null ? lastNamed.getName() : null;
}
@Override
public UniformItemPathImpl subPath(int from, int to) {
int fromClipped = Math.max(0, from);
int toClipped = Math.min(to, segments.size());
if (fromClipped >= toClipped) {
return EMPTY_PATH;
} else {
return new UniformItemPathImpl(segments.subList(fromClipped, toClipped));
}
}
@Override
public ItemPathSegment getSegment(int i) {
return segments.get(i);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
shortDump(sb);
return sb.toString();
}
static UniformItemPath create(Object... segments) {
return new UniformItemPathImpl(segments);
}
}