com.google.common.collect.RegularContiguousSet Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of wildfly-client-all
This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).
There is a newer version: 35.0.0.Beta1
Show newest version
/*
 * Copyright (C) 2011 The Guava Authors
 *
 * 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.google.common.collect;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkElementIndex;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.BoundType.CLOSED;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import java.io.Serializable;
import java.util.Collection;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;

/**
 * An implementation of {@link ContiguousSet} that contains one or more elements.
 *
 * @author Gregory Kick
 */
@GwtCompatible(emulated = true)
@SuppressWarnings("unchecked") // allow ungenerified Comparable types
final class RegularContiguousSet extends ContiguousSet {
  private final Range range;

  RegularContiguousSet(Range range, DiscreteDomain domain) {
    super(domain);
    this.range = range;
  }

  private ContiguousSet intersectionInCurrentDomain(Range other) {
    return (range.isConnected(other))
        ? ContiguousSet.create(range.intersection(other), domain)
        : new EmptyContiguousSet(domain);
  }

  @Override
  ContiguousSet headSetImpl(C toElement, boolean inclusive) {
    return intersectionInCurrentDomain(Range.upTo(toElement, BoundType.forBoolean(inclusive)));
  }

  @Override
  ContiguousSet subSetImpl(
      C fromElement, boolean fromInclusive, C toElement, boolean toInclusive) {
    if (fromElement.compareTo(toElement) == 0 && !fromInclusive && !toInclusive) {
      // Range would reject our attempt to create (x, x).
      return new EmptyContiguousSet(domain);
    }
    return intersectionInCurrentDomain(
        Range.range(
            fromElement, BoundType.forBoolean(fromInclusive),
            toElement, BoundType.forBoolean(toInclusive)));
  }

  @Override
  ContiguousSet tailSetImpl(C fromElement, boolean inclusive) {
    return intersectionInCurrentDomain(Range.downTo(fromElement, BoundType.forBoolean(inclusive)));
  }

  @GwtIncompatible // not used by GWT emulation
  @Override
  int indexOf(Object target) {
    return contains(target) ? (int) domain.distance(first(), (C) target) : -1;
  }

  @Override
  public UnmodifiableIterator iterator() {
    return new AbstractSequentialIterator(first()) {
      final C last = last();

      @Override
      protected C computeNext(C previous) {
        return equalsOrThrow(previous, last) ? null : domain.next(previous);
      }
    };
  }

  @GwtIncompatible // NavigableSet
  @Override
  public UnmodifiableIterator descendingIterator() {
    return new AbstractSequentialIterator(last()) {
      final C first = first();

      @Override
      protected C computeNext(C previous) {
        return equalsOrThrow(previous, first) ? null : domain.previous(previous);
      }
    };
  }

  private static boolean equalsOrThrow(Comparable left, @NullableDecl Comparable right) {
    return right != null && Range.compareOrThrow(left, right) == 0;
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public C first() {
    return range.lowerBound.leastValueAbove(domain);
  }

  @Override
  public C last() {
    return range.upperBound.greatestValueBelow(domain);
  }

  @Override
  ImmutableList createAsList() {
    if (domain.supportsFastOffset) {
      return new ImmutableAsList() {
        @Override
        ImmutableSortedSet delegateCollection() {
          return RegularContiguousSet.this;
        }

        @Override
        public C get(int i) {
          checkElementIndex(i, size());
          return domain.offset(first(), i);
        }
      };
    } else {
      return super.createAsList();
    }
  }

  @Override
  public int size() {
    long distance = domain.distance(first(), last());
    return (distance >= Integer.MAX_VALUE) ? Integer.MAX_VALUE : (int) distance + 1;
  }

  @Override
  public boolean contains(@NullableDecl Object object) {
    if (object == null) {
      return false;
    }
    try {
      return range.contains((C) object);
    } catch (ClassCastException e) {
      return false;
    }
  }

  @Override
  public boolean containsAll(Collection targets) {
    return Collections2.containsAllImpl(this, targets);
  }

  @Override
  public boolean isEmpty() {
    return false;
  }

  @Override
  public ContiguousSet intersection(ContiguousSet other) {
    checkNotNull(other);
    checkArgument(this.domain.equals(other.domain));
    if (other.isEmpty()) {
      return other;
    } else {
      C lowerEndpoint = Ordering.natural().max(this.first(), other.first());
      C upperEndpoint = Ordering.natural().min(this.last(), other.last());
      return (lowerEndpoint.compareTo(upperEndpoint) <= 0)
          ? ContiguousSet.create(Range.closed(lowerEndpoint, upperEndpoint), domain)
          : new EmptyContiguousSet(domain);
    }
  }

  @Override
  public Range range() {
    return range(CLOSED, CLOSED);
  }

  @Override
  public Range range(BoundType lowerBoundType, BoundType upperBoundType) {
    return Range.create(
        range.lowerBound.withLowerBoundType(lowerBoundType, domain),
        range.upperBound.withUpperBoundType(upperBoundType, domain));
  }

  @Override
  public boolean equals(@NullableDecl Object object) {
    if (object == this) {
      return true;
    } else if (object instanceof RegularContiguousSet) {
      RegularContiguousSet that = (RegularContiguousSet) object;
      if (this.domain.equals(that.domain)) {
        return this.first().equals(that.first()) && this.last().equals(that.last());
      }
    }
    return super.equals(object);
  }

  // copied to make sure not to use the GWT-emulated version
  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(this);
  }

  @GwtIncompatible // serialization
  private static final class SerializedForm implements Serializable {
    final Range range;
    final DiscreteDomain domain;

    private SerializedForm(Range range, DiscreteDomain domain) {
      this.range = range;
      this.domain = domain;
    }

    private Object readResolve() {
      return new RegularContiguousSet(range, domain);
    }
  }

  @GwtIncompatible // serialization
  @Override
  Object writeReplace() {
    return new SerializedForm(range, domain);
  }

  private static final long serialVersionUID = 0;
}