/
Deep.java
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/
Deep.java
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package org.rapidoid.commons;
import org.rapidoid.RapidoidThing;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.cls.Cls;
import org.rapidoid.collection.AutoExpandingMap;
import org.rapidoid.collection.Coll;
import org.rapidoid.lambda.Mapper;
import java.util.Collection;
import java.util.Map;
/*
* #%L
* rapidoid-commons
* %%
* Copyright (C) 2014 - 2017 Nikolche Mihajlovski and 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.
* #L%
*/
@Authors("Nikolche Mihajlovski")
@Since("5.1.0")
public class Deep extends RapidoidThing {
@SuppressWarnings("unchecked")
public static Object copyOf(Object source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
if (Coll.isCollection(source)) {
return copyOf((Collection<?>) source, transformation);
} else if (Coll.isMap(source)) {
return copyOf((Map<?, ?>) source, transformation);
} else if (source instanceof Object[]) {
// FIXME support primitive arrays
return copyOf((Object[]) source, transformation);
} else {
try {
return transformation != null ? transformation.map(source) : source;
} catch (Exception e) {
throw new RuntimeException("Transformation error!", e);
}
}
}
@SuppressWarnings("unchecked")
public static <T> Collection<T> copyOf(Collection<? extends T> source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
Collection<T> destination = newInstance(source);
copy(destination, source, transformation);
return destination;
}
@SuppressWarnings("unchecked")
public static <T> void copy(Collection<T> destination, Collection<? extends T> source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
Err.argMust(destination != null, "destination cannot be null!");
destination.clear();
for (Object el : source) {
destination.add((T) copyOf(el, transformation));
}
}
@SuppressWarnings("unchecked")
public static <T> T[] copyOf(T[] source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
T[] destination = (T[]) newInstance(source);
copy(destination, source, transformation);
return destination;
}
@SuppressWarnings("unchecked")
public static <T> void copy(T[] destination, T[] source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
Err.argMust(destination != null, "destination cannot be null!");
Err.argMust(source.length == destination.length, "source and destination arrays must have the same length!");
for (int i = 0; i < destination.length; i++) {
destination[i] = (T) copyOf(source[i], transformation);
}
}
@SuppressWarnings("unchecked")
public static <K, V> Map<K, V> copyOf(Map<? extends K, ? extends V> source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
Map<K, V> destination = newInstance(source);
copy(destination, source, transformation);
return destination;
}
@SuppressWarnings("unchecked")
public static <K, V> void copy(Map<K, V> destination, Map<? extends K, ? extends V> source, Mapper<Object, ?> transformation) {
Err.argMust(source != null, "source cannot be null!");
Err.argMust(destination != null, "destination cannot be null!");
destination.clear();
for (Map.Entry<? extends K, ? extends V> e : source.entrySet()) {
K key = (K) copyOf(e.getKey(), transformation);
V value = (V) copyOf(e.getValue(), transformation);
destination.put(key, value);
}
}
@SuppressWarnings("unchecked")
private static <T> T newInstance(Object source) {
if (source instanceof AutoExpandingMap) {
AutoExpandingMap autoExpandingMap = (AutoExpandingMap) source;
return (T) autoExpandingMap.copy();
}
return (T) Cls.newInstance(source.getClass());
}
}