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Miscellaneous Utilities (Pure Java)

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/*
 * Copyright (c) 2019 by Andrew Charneski.
 *
 * The author licenses this file to you 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.simiacryptus.util.binary.bitset;

import com.simiacryptus.ref.wrappers.RefMap;
import com.simiacryptus.util.CountCollection;
import com.simiacryptus.util.binary.BitInputStream;
import com.simiacryptus.util.binary.BitOutputStream;
import com.simiacryptus.util.binary.Bits;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;

public abstract class BitsCollection> extends CountCollection {

  @Nullable
  public final Integer bitDepth;

  public BitsCollection(final C collection) {
    super(collection);
    this.bitDepth = null;
  }

  public BitsCollection(final int bitDepth, final C collection) {
    super(collection);
    this.bitDepth = bitDepth;
  }

  @Nonnull
  public CodeType getType(@Nonnull final Bits bits) {
    if (null != this.bitDepth) {
      if (bits.bitLength == this.bitDepth) {
        return CodeType.Terminal;
      }
      if (bits.bitLength < this.bitDepth) {
        return CodeType.Prefix;
      }
      throw new IllegalArgumentException();
    }
    return CodeType.Unknown;
  }

  public abstract void read(BitInputStream in) throws IOException;

  public abstract void write(BitOutputStream out) throws IOException;

  public @SuppressWarnings("unused")
  void _free() {
    super._free();
  }

  @Nonnull
  public @Override
  @SuppressWarnings("unused")
  BitsCollection addRef() {
    return (BitsCollection) super.addRef();
  }

  public enum CodeType {
    Terminal, Prefix, Unknown
  }

}