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ninja.leaping.configurate.SimpleConfigurationNode Maven / Gradle / Ivy
/**
* Configurate
* Copyright (C) zml and Configurate contributors
*
* Licensed 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 ninja.leaping.configurate;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.reflect.TypeParameter;
import com.google.common.reflect.TypeToken;
import ninja.leaping.configurate.objectmapping.ObjectMappingException;
import ninja.leaping.configurate.objectmapping.serialize.TypeSerializer;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.function.Function;
import java.util.function.Supplier;
/**
* Simple implementation of a configuration node
*/
public class SimpleConfigurationNode implements ConfigurationNode {
private final ConfigurationOptions options;
volatile boolean attached;
/**
* Path of this node.
*
* Internally, may only be modified when an operation that adds or removes a node at the same or higher level in the node tree
*/
volatile Object key;
private SimpleConfigurationNode parent;
private volatile ConfigValue value;
public static SimpleConfigurationNode root() {
return root(ConfigurationOptions.defaults());
}
public static SimpleConfigurationNode root(ConfigurationOptions options) {
return new SimpleConfigurationNode(null, null, options);
}
protected SimpleConfigurationNode(Object key, SimpleConfigurationNode parent, ConfigurationOptions options) {
Preconditions.checkNotNull(options, "options");
this.key = key;
if (parent == null) {
attached = true;
}
this.options = options;
this.parent = parent == null ? null : parent;
value = new NullConfigValue(this);
}
@Override
public Object getValue(Object def) {
Object ret = value.getValue();
return ret == null ? calculateDef(def) : ret;
}
@Override
public Object getValue(Supplier defSupplier) {
Object ret = value.getValue();
return ret == null ? calculateDef(defSupplier.get()) : ret;
}
// {{{ Typed values
@Override
public T getValue(Function transformer, T def) {
T ret = transformer.apply(getValue());
return ret == null ? calculateDef(def) : ret;
}
@Override
public T getValue(Function transformer, Supplier defSupplier) {
T ret = transformer.apply(getValue());
return ret == null ? calculateDef(defSupplier.get()) : ret;
}
private T calculateDef(T defValue) {
if (defValue != null && getOptions().shouldCopyDefaults()) {
setValue(defValue);
}
return defValue;
}
@Override
public List getList(Function transformer) {
final ImmutableList.Builder build = ImmutableList.builder();
ConfigValue value = this.value;
if (value instanceof ListConfigValue) {
for (SimpleConfigurationNode o : value.iterateChildren()) {
T transformed = transformer.apply(o.getValue());
if (transformed != null) {
build.add(transformed);
}
}
} else {
T transformed = transformer.apply(value.getValue());
if (transformed != null) {
build.add(transformed);
}
}
return build.build();
}
@Override
public List getList(Function transformer, List def) {
List ret = getList(transformer);
return ret.isEmpty() ? calculateDef(def) : ret;
}
@Override
public List getList(Function transformer, Supplier> defSupplier) {
List ret = getList(transformer);
return ret.isEmpty() ? calculateDef(defSupplier.get()) : ret;
}
@Override
public List getList(TypeToken type, List def) throws ObjectMappingException {
List ret = getValue(new TypeToken>() {}
.where(new TypeParameter() {}, type), def);
return ret.isEmpty() ? calculateDef(def) : ret;
}
@Override
public List getList(TypeToken type, Supplier> defSupplier) throws ObjectMappingException {
List ret = getValue(new TypeToken>() {}
.where(new TypeParameter() {}, type), defSupplier);
return ret.isEmpty() ? calculateDef(defSupplier.get()) : ret;
}
// }}}
@Override
public SimpleConfigurationNode setValue(Object newValue) {
if (newValue instanceof ConfigurationNode) {
ConfigurationNode newNode = (ConfigurationNode) newValue;
if (newNode.hasListChildren()) {
attachIfNecessary();
ListConfigValue newList = new ListConfigValue(this);
synchronized (newNode) {
List children = newNode.getChildrenList();
for (int i = 0; i < children.size(); ++i) {
SimpleConfigurationNode child = createNode(i);
child.attached = true;
newList.putChild(i, child);
child.setValue(children.get(i));
}
}
this.value = newList;
return this;
} else if (newNode.hasMapChildren()) {
attachIfNecessary();
MapConfigValue newMap = new MapConfigValue(this);
synchronized (newNode) {
Map children = newNode.getChildrenMap();
for (Map.Entry ent : children.entrySet()) {
SimpleConfigurationNode child = createNode(ent.getKey());
child.attached = true;
newMap.putChild(ent.getKey(), child);
child.setValue(ent.getValue());
}
}
this.value = newMap;
return this;
} else {
newValue = newNode.getValue();
}
}
if (newValue == null) {
if (parent == null) {
clear();
} else {
parent.removeChild(key);
}
return this;
}
insertNewValue(newValue, false);
return this;
}
@Override
@SuppressWarnings("unchecked")
public T getValue(TypeToken type, T def) throws ObjectMappingException {
Object value = getValue();
if (value == null) {
if (def != null && getOptions().shouldCopyDefaults()) {
setValue(type, def);
}
return def;
}
TypeSerializer serial = getOptions().getSerializers().get(type);
if (serial == null) {
if (type.getRawType().isInstance(value)) {
return (T) type.getRawType().cast(value);
} else {
if (def != null && getOptions().shouldCopyDefaults()) {
setValue(type, def);
}
return def;
}
}
return (T) serial.deserialize(type, this);
}
@Override
@SuppressWarnings("unchecked")
public T getValue(TypeToken type, Supplier defSupplier) throws ObjectMappingException {
Object value = getValue();
if (value == null) {
T def = defSupplier.get();
if (def != null && getOptions().shouldCopyDefaults()) {
setValue(type, def);
}
return def;
}
TypeSerializer serial = getOptions().getSerializers().get(type);
if (serial == null) {
if (type.getRawType().isInstance(value)) {
return (T) type.getRawType().cast(value);
} else {
T def = defSupplier.get();
if (def != null && getOptions().shouldCopyDefaults()) {
setValue(type, def);
}
return def;
}
}
return (T) serial.deserialize(type, this);
}
private void insertNewValue(Object newValue, boolean onlyIfNull) {
attachIfNecessary();
synchronized (this) {
ConfigValue oldValue, value;
oldValue = value = this.value;
if (onlyIfNull && !(oldValue instanceof NullConfigValue)){
return;
}
if (newValue instanceof Collection) {
if (!(value instanceof ListConfigValue)) {
value = new ListConfigValue(this);
}
} else if (newValue instanceof Map) {
if (!(value instanceof MapConfigValue)) {
value = new MapConfigValue(this);
}
} else if (!(value instanceof ScalarConfigValue)) {
value = new ScalarConfigValue(this);
}
value.setValue(newValue);
/*if (oldValue != null && oldValue != value) {
oldValue.clear();
}*/
this.value = value;
}
}
@Override
public ConfigurationNode mergeValuesFrom(ConfigurationNode other) {
/*if (other.hasListChildren()) {
ConfigValue oldValue, newValue;
do {
oldValue = newValue = value.get();
if (!(oldValue instanceof ListConfigValue)) {
if (oldValue instanceof NullConfigValue) {
oldValue = new ListConfigValue(this);
} else {
break;
}
}
// TODO: How to merge list values?
} while (!this.value.compareAndSet(oldValue, newValue));
} else */if (other.hasMapChildren()) {
ConfigValue oldValue, newValue;
synchronized (this) {
oldValue = newValue = value;
if (!(oldValue instanceof MapConfigValue)) {
if (oldValue instanceof NullConfigValue) {
newValue = new MapConfigValue(this);
} else {
return this;
}
}
for (Map.Entry ent : other.getChildrenMap().entrySet()) {
SimpleConfigurationNode newChild = createNode(ent.getKey());
newChild.attached = true;
newChild.setValue(ent.getValue());
SimpleConfigurationNode existing = newValue.putChildIfAbsent(ent.getKey(), newChild);
if (existing != null) {
existing.mergeValuesFrom(newChild);
}
}
this.value = newValue;
}
} else if (other.getValue() != null) {
insertNewValue(other.getValue(), true);
}
return this;
}
// {{{ Children
@Override
public SimpleConfigurationNode getNode(Object... path) {
SimpleConfigurationNode ret = this;
for (Object el : path) {
ret = ret.getChild(el, false);
}
return ret;
}
@Override
public boolean isVirtual() {
return !attached;
}
@Override
public boolean hasListChildren() {
return this.value instanceof ListConfigValue;
}
@Override
public boolean hasMapChildren() {
return this.value instanceof MapConfigValue;
}
@Override
@SuppressWarnings("unchecked")
public List getChildrenList() {
ConfigValue value = this.value;
return value instanceof ListConfigValue ? ImmutableList.copyOf(((ListConfigValue) value).values.get()) : Collections
.emptyList();
}
@Override
@SuppressWarnings("unchecked")
public Map getChildrenMap() {
ConfigValue value = this.value;
return value instanceof MapConfigValue ? ImmutableMap.copyOf(((MapConfigValue) value).values) : Collections
.emptyMap();
}
protected SimpleConfigurationNode getChild(Object key, boolean attach) {
SimpleConfigurationNode child = value.getChild(key);
if (child == null) { // Does not currently exist!
if (attach) {
attachIfNecessary();
SimpleConfigurationNode existingChild = value.putChildIfAbsent(key, (child = createNode(key)));
if (existingChild != null) {
child = existingChild;
} else {
attachChild(child);
}
} else {
child = createNode(key);
}
}
return child;
}
@Override
public boolean removeChild(Object key) {
return possiblyDetach(value.putChild(key, null)) != null;
}
private SimpleConfigurationNode possiblyDetach(SimpleConfigurationNode node) {
if (node != null) {
node.attached = false;
node.clear();
}
return node;
}
@Override
public SimpleConfigurationNode getAppendedNode() {
return getChild(-1, false);
}
@Override
public Object getKey() {
return this.key;
}
@Override
public Object[] getPath() {
LinkedList pathElements = new LinkedList<>();
ConfigurationNode ptr = this;
if (ptr.getParent() == null) {
return new Object[] {this.getKey()};
}
do {
pathElements.addFirst(ptr.getKey());
} while ((ptr = ptr.getParent()).getParent() != null);
return pathElements.toArray();
}
public SimpleConfigurationNode getParent() {
return this.parent;
}
@Override
public ConfigurationOptions getOptions() {
return this.options;
}
// }}}
// {{{ Internal methods
SimpleConfigurationNode getParentAttached() {
SimpleConfigurationNode parent = this.parent;
if (parent.isVirtual()) {
parent = parent.getParentAttached().attachChildIfAbsent(parent);
}
return this.parent = parent;
}
private SimpleConfigurationNode attachChildIfAbsent(SimpleConfigurationNode child) {
if (isVirtual()) {
throw new IllegalStateException("This parent is not currently attached. This is an internal state violation.");
}
if (!child.getParentAttached().equals(this)) {
throw new IllegalStateException("Child " + child +
" path is not a direct parent of me (" + this + "), cannot attach");
}
ConfigValue oldValue, newValue;
synchronized (this) {
newValue = oldValue = this.value;
if (!(oldValue instanceof MapConfigValue)) {
if (child.key instanceof Integer) {
if (oldValue instanceof NullConfigValue) {
newValue = new ListConfigValue(this);
} else if (!(oldValue instanceof ListConfigValue)) {
newValue = new ListConfigValue(this, oldValue.getValue());
}
} else {
newValue = new MapConfigValue(this);
}
}
SimpleConfigurationNode oldChild = newValue.putChildIfAbsent(child.key, child);
if (oldChild != null) {
return oldChild;
}
value = newValue;
}
if (newValue != oldValue) {
oldValue.clear();
}
child.attached = true;
return child;
}
protected SimpleConfigurationNode createNode(Object path) {
return new SimpleConfigurationNode(path, this, options);
}
protected void attachIfNecessary() {
if (!attached) {
getParentAttached().attachChild(this);
}
}
protected void attachChild(SimpleConfigurationNode child) {
if (isVirtual()) {
throw new IllegalStateException("This parent is not currently attached. This is an internal state violation.");
}
if (!child.getParentAttached().equals(this)) {
throw new IllegalStateException("Child " + child +
" path is not a direct parent of me (" + this + "), cannot attach");
}
ConfigValue oldValue, newValue;
synchronized (this) {
newValue = oldValue = this.value;
if (!(oldValue instanceof MapConfigValue)) {
if (child.key instanceof Integer) {
if (oldValue instanceof NullConfigValue) {
newValue = new ListConfigValue(this);
} else if (!(oldValue instanceof ListConfigValue)) {
newValue = new ListConfigValue(this, oldValue.getValue());
}
} else {
newValue = new MapConfigValue(this);
}
}
possiblyDetach(newValue.putChild(child.key, child));
value = newValue;
}
if (newValue != oldValue) {
oldValue.clear();
}
child.attached = true;
}
protected void clear() {
synchronized (this) {
ConfigValue oldValue = this.value;
value = new NullConfigValue(this);
oldValue.clear();
}
}
// }}}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof SimpleConfigurationNode)) return false;
SimpleConfigurationNode that = (SimpleConfigurationNode) o;
if (attached != that.attached) return false;
if (key != null ? !key.equals(that.key) : that.key != null) return false;
if (!options.equals(that.options)) return false;
if (parent != null ? !parent.equals(that.parent) : that.parent != null)
return false;
if (!value.equals(that.value)) return false;
return true;
}
@Override
public int hashCode() {
int result = options.hashCode();
result = 31 * result + (attached ? 1 : 0);
result = 31 * result + (key != null ? key.hashCode() : 0);
result = 31 * result + (parent != null ? parent.hashCode() : 0);
result = 31 * result + value.hashCode();
return result;
}
@Override
public String toString() {
return "SimpleConfigurationNode{" +
"options=" + options +
", attached=" + attached +
", key=" + key +
", parent=" + parent +
", value=" + value +
'}';
}
}
