示例#1
0
  /**
   * Finds the index of a trait of a given type in this set.
   *
   * @param traitDef Sought trait definition
   * @return index of trait, or -1 if not found
   */
  private int findIndex(RelTraitDef traitDef) {
    for (int i = 0; i < traits.length; i++) {
      RelTrait trait = traits[i];
      if ((trait != null) && (trait.getTraitDef() == traitDef)) {
        return i;
      }
    }

    return -1;
  }
示例#2
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  /**
   * Returns a trait set consisting of the current set plus a new trait.
   *
   * <p>If the set does not contain a trait of the same {@link RelTraitDef}, the trait is ignored,
   * and this trait set is returned.
   *
   * @param trait the new trait
   * @return New set
   * @see #plus(RelTrait)
   */
  public RelTraitSet replace(RelTrait trait) {
    final RelTraitDef traitDef = trait.getTraitDef();
    int index = findIndex(traitDef);
    if (index < 0) {
      // Trait is not present. Ignore it.
      return this;
    }

    return replace(index, trait);
  }
示例#3
0
  /**
   * Replaces an existing RelTrait in the set. Returns a different trait set; does not modify this
   * trait set.
   *
   * @param index 0-based index into ordered RelTraitSet
   * @param trait the new RelTrait
   * @return the old RelTrait at the index
   */
  public RelTraitSet replace(int index, RelTrait trait) {
    assert traits[index].getTraitDef() == trait.getTraitDef()
        : "RelTrait has different RelTraitDef than replacement";

    RelTrait canonizedTrait = canonize(trait);
    if (traits[index] == canonizedTrait) {
      return this;
    }
    RelTrait[] newTraits = traits.clone();
    newTraits[index] = canonizedTrait;
    return cache.getOrAdd(new RelTraitSet(cache, newTraits));
  }
示例#4
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 /**
  * Returns this trait set with a given trait added or overridden. Does not modify this trait set.
  *
  * @param trait Trait
  * @return Trait set with given trait
  */
 public RelTraitSet plus(RelTrait trait) {
   if (contains(trait)) {
     return this;
   }
   int i = findIndex(trait.getTraitDef());
   if (i >= 0) {
     return replace(i, trait);
   }
   final RelTrait canonizedTrait = canonize(trait);
   RelTrait[] newTraits = Arrays.copyOf(traits, traits.length + 1);
   newTraits[newTraits.length - 1] = canonizedTrait;
   return cache.getOrAdd(new RelTraitSet(cache, newTraits));
 }
示例#5
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 /**
  * Returns whether this trait set contains the given trait, or whether the trait is not present
  * because its {@link RelTraitDef} is not enabled. Returns false if another trait of the same
  * {@code RelTraitDef} is present.
  *
  * @param trait Trait
  * @return Whether trait is present, or is absent because disabled
  */
 public boolean containsIfApplicable(RelTrait trait) {
   // Note that '==' is sufficient, because trait should be canonized.
   final RelTrait trait1 = getTrait(trait.getTraitDef());
   return trait1 == null || trait1 == trait;
 }