dev.cel.common.internal.SupplementalCodePointArray Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of runtime Show documentation
Common Expression Language Runtime for Java
The newest version!
// Copyright 2022 Google LLC
//
// 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
//
//      https://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 dev.cel.common.internal;

import static com.google.common.base.Preconditions.checkElementIndex;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkPositionIndexes;

import com.google.auto.value.AutoValue;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableList;
import com.google.errorprone.annotations.Immutable;
import dev.cel.common.annotations.Internal;

/**
 * Array of code points that contain code points from Latin-1 character set, basic multilingual
 * plane or the supplemental multilingual plane.
 *
 * CEL Library Internals. Do Not Use.
 */
@Immutable
@VisibleForTesting
@Internal
@AutoValue
@AutoValue.CopyAnnotations
@SuppressWarnings("Immutable") // int[] is not exposed externally, thus cannot be mutated.
public abstract class SupplementalCodePointArray extends CelCodePointArray {

  @SuppressWarnings("AutoValueImmutableFields")
  abstract int[] codePoints();

  abstract int offset();

  static SupplementalCodePointArray create(
      int[] codePoints, int size, ImmutableList lineOffsets) {
    return create(codePoints, 0, lineOffsets, size);
  }

  static SupplementalCodePointArray create(
      int[] codePoints, int offset, ImmutableList lineOffsets, int size) {
    return new AutoValue_SupplementalCodePointArray(
        size, checkNotNull(lineOffsets), codePoints, offset);
  }

  @Override
  public SupplementalCodePointArray slice(int i, int j) {
    checkPositionIndexes(i, j, size());
    return create(codePoints(), offset() + i, lineOffsets(), j - i);
  }

  @Override
  public int get(int index) {
    checkElementIndex(index, size());
    return codePoints()[offset() + index];
  }

  @Override
  public final String toString() {
    return new String(codePoints(), offset(), size());
  }
}