import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** A regex pattern implementation which is backed by the {@link Pattern}. */
@ElementTypesAreNonnullByDefault
@GwtIncompatible
final class JdkPattern extends CommonPattern implements Serializable {
  private final Pattern pattern;

  JdkPattern(Pattern pattern) {
    this.pattern = Preconditions.checkNotNull(pattern);
  }

  @Override

        // Pattern uses Object (identity) equality, so we have to reach
        // inside to compare individual fields.
        return Objects.equal(pattern.pattern(), that.pattern.pattern())
            && pattern.flags() == that.pattern.flags();
      }
      return false;
    }

    @Override
    public String toString() {
      String patternString =

  }

  @GwtIncompatible // java.util.regex.Pattern
  public void testContains_equals() {
    new EqualsTester()
        .addEqualityGroup(
            Predicates.contains(Pattern.compile("foo")), Predicates.containsPattern("foo"))
        .addEqualityGroup(Predicates.contains(Pattern.compile("foo", Pattern.CASE_INSENSITIVE)))
        .addEqualityGroup(Predicates.containsPattern("bar"))

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** A regex pattern implementation which is backed by the {@link Pattern}. */
@ElementTypesAreNonnullByDefault
@GwtIncompatible
final class JdkPattern extends CommonPattern implements Serializable {
  private final Pattern pattern;

  JdkPattern(Pattern pattern) {
    this.pattern = Preconditions.checkNotNull(pattern);
  }

  @Override

    Iterable<String> testPatterningMotto =
        Splitter.onPattern("-").split("Testing-rocks-Debugging-sucks");
    assertThat(testPatterningMotto)
        .containsExactly("Testing", "rocks", "Debugging", "sucks")
        .inOrder();
  }

  @GwtIncompatible // java.util.regex.Pattern
  private static Pattern literalDotPattern() {
    return Pattern.compile("\\.");
  }

  @GwtIncompatible // java.util.regex.Pattern

 * one or more methods to modify the behavior of the backing map entry as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingMapEntry} forward <i>indiscriminately</i> to
 * the methods of the delegate. For example, overriding {@link #getValue} alone <i>will not</i>

/**
 * Pluggable interface for compiling a regex pattern. By default this package uses the {@code
 * java.util.regex} library, but an alternate implementation can be supplied using the {@link
 * java.util.ServiceLoader} mechanism.
 */
@GwtIncompatible
@ElementTypesAreNonnullByDefault
interface PatternCompiler {
  /**
   * Compiles the given pattern.
   *
   * @throws IllegalArgumentException if the pattern is invalid
   */
  @RestrictedApi(

     * that, we hardcode the JDK Pattern compiler on Android (and, inadvertently, on App Engine and
     * in Guava, at least for now).
     */
    return new JdkPatternCompiler();
  }

  private static final class JdkPatternCompiler implements PatternCompiler {
    @Override
    public CommonPattern compile(String pattern) {
      return new JdkPattern(Pattern.compile(pattern));
    }

    @Override

   * Returns a splitter that considers any subsequence matching a given pattern (regular expression)
   * to be a separator. For example, {@code Splitter.onPattern("\r?\n").split(entireFile)} splits a
   * string into lines whether it uses DOS-style or UNIX-style line terminators. This is equivalent
   * to {@code Splitter.on(Pattern.compile(pattern))}.
   *
   * @param separatorPattern the pattern that determines whether a subsequence is a separator. This

 * should override one or more methods to modify the behavior of the backing multiset as desired per
 * the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingSortedMultiset} forward
 * <b>indiscriminately</b> to the methods of the delegate. For example, overriding {@link