/*
* Copyright 2000-2012 JetBrains s.r.o.
*
* 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 com.intellij.util.keyFMap;
import com.intellij.openapi.util.Key;
import org.jetbrains.annotations.NotNull;
class PairElementsFMap implements KeyFMap {
private final int key1;
private final int key2;
private final Object value1;
private final Object value2;
PairElementsFMap(int key1, @NotNull Object value1, int key2, @NotNull Object value2) {
this.key1 = key1;
this.value1 = value1;
this.key2 = key2;
this.value2 = value2;
assert key1 != key2;
}
@NotNull
@Override
public <V> KeyFMap plus(@NotNull Key<V> key, @NotNull V value) {
int keyCode = key.hashCode();
if (keyCode == key1) return new PairElementsFMap(keyCode, value, key2, value2);
if (keyCode == key2) return new PairElementsFMap(keyCode, value, key1, value1);
return new ArrayBackedFMap(new int[]{key1, key2, keyCode}, new Object[]{value1, value2, value});
}
@NotNull
@Override
public KeyFMap minus(@NotNull Key<?> key) {
int keyCode = key.hashCode();
if (keyCode == key1) return new OneElementFMap<Object>(key2, value2);
if (keyCode == key2) return new OneElementFMap<Object>(key1, value1);
return this;
}
@Override
public <V> V get(@NotNull Key<V> key) {
int keyCode = key.hashCode();
//noinspection unchecked
return keyCode == key1 ? (V)value1 : keyCode == key2 ? (V)value2 : null;
}
@Override
public String toString() {
return "Pair: ("+ Key.getKeyByIndex(key1) + " -> " + value1+"; "+Key.getKeyByIndex(key2) + " -> " + value2 + ")";
}
@Override
public boolean isEmpty() {
return false;
}
}