76 lines
2.2 KiB
Java
76 lines
2.2 KiB
Java
package net.minecraft.util;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Iterators;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Maps;
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import java.util.AbstractCollection;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import net.minecraft.Util;
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public class ClassInstanceMultiMap<T> extends AbstractCollection<T> {
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private final Map<Class<?>, List<T>> byClass = Maps.<Class<?>, List<T>>newHashMap();
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private final Class<T> baseClass;
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private final List<T> allInstances = Lists.<T>newArrayList();
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public ClassInstanceMultiMap(Class<T> baseClass) {
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this.baseClass = baseClass;
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this.byClass.put(baseClass, this.allInstances);
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}
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public boolean add(T object) {
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boolean bl = false;
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for (Entry<Class<?>, List<T>> entry : this.byClass.entrySet()) {
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if (((Class)entry.getKey()).isInstance(object)) {
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bl |= ((List)entry.getValue()).add(object);
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}
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}
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return bl;
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}
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public boolean remove(Object object) {
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boolean bl = false;
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for (Entry<Class<?>, List<T>> entry : this.byClass.entrySet()) {
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if (((Class)entry.getKey()).isInstance(object)) {
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List<T> list = (List<T>)entry.getValue();
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bl |= list.remove(object);
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}
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}
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return bl;
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}
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public boolean contains(Object object) {
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return this.find(object.getClass()).contains(object);
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}
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public <S> Collection<S> find(Class<S> type) {
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if (!this.baseClass.isAssignableFrom(type)) {
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throw new IllegalArgumentException("Don't know how to search for " + type);
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} else {
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List<? extends T> list = (List<? extends T>)this.byClass
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.computeIfAbsent(type, class_ -> (List)this.allInstances.stream().filter(class_::isInstance).collect(Util.toMutableList()));
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return Collections.unmodifiableCollection(list);
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}
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}
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public Iterator<T> iterator() {
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return (Iterator<T>)(this.allInstances.isEmpty() ? Collections.emptyIterator() : Iterators.unmodifiableIterator(this.allInstances.iterator()));
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}
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public List<T> getAllInstances() {
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return ImmutableList.copyOf(this.allInstances);
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}
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public int size() {
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return this.allInstances.size();
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}
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}
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