Convert all BigQuery deserialized enum types to StringEnumValue

[tcoffee-google]

Introduces generalization of pattern for Storage/Datastore/Logging to simulate enum types with
single data members. This appears to cover all cases in remaining Cloud APIs.

[tcoffee-google]

Posting BigQuery for design review before converting remaining APIs.

[coveralls]

Changes Unknown when pulling 7aeab93 on tcoffee-google:string_enum_bigquery into ** on GoogleCloudPlatform:master**.

[tcoffee-google]

@garrettjonesgoogle would you agree with the codacy-bot recommendation here? If so, I can retroactively change the previously published StringEnumValue subclasses as well.

[coveralls]

Changes Unknown when pulling 389bbdd on tcoffee-google:string_enum_bigquery into ** on GoogleCloudPlatform:master**.

[shinfan]

It would be nice to fix the codacy-bot suggestions... Those posts make the page very long and hard to scroll...

[garrettjonesgoogle]

@tcoffee-google sure, let's take care of the codacy recommendations.

[tcoffee-google]

Fixed for BigQuery --- I'll change this others once this one is approved.

[garrettjonesgoogle]

LGTM

[tcoffee-google]

For reference in case of future maintenance, the enums to be converted were found from instances of the (Emacs-style) regexp

\( *\)\(\w+ \)*fromPb(.*) {
\(\1  .*
\)*?\1  .*?valueOf.*
\(\1  .*
\)*?\1}

and conversions were done by fixed-point application of the following regexp replacements (the first two are sufficient for cases without subfields):

1. convert enum to class

\( *\)\(\(\w+ \)*\)?enum \(\w+\) {
\(\(\(\1  .*\)?
\)*\)\1}

=>

\1\2static final class \4 extends StringEnumValue {
\1  private static final long serialVersionUID = \,(random)L;

\1  private static final ApiFunction<String, \4> CONSTRUCTOR =
\1      new ApiFunction<String, \4>() {
\1        @Override
\1        public \4 apply(String constant) {
\1          return new \4(constant);
\1        }
\1      };

\1  private static final StringEnumType<\4> type = new StringEnumType(
\1      \4.class,
\1      CONSTRUCTOR);

\5
\1  private \4(String constant) {
\1    super(constant);
\1  }

\1  /**
\1   * Get the \4 for the given String constant, and throw an exception if the constant is
\1   * not recognized.
\1   */
\1  \2static \4 valueOfStrict(String constant) {
\1    return type.valueOfStrict(constant);
\1  }

\1  /**
\1   * Get the \4 for the given String constant, and allow unrecognized values.
\1   */
\1  \2static \4 valueOf(String constant) {
\1    return type.valueOf(constant);
\1  }

\1  /**
\1   * Return the known values for \4.
\1   */
\1  \2static \4[] values() {
\1    return type.values();
\1  }
\1}

(removing the initial "static" for top-level enums)

2. convert values to fields

\( *\)\(\(\w+ \)*\)class \(\w+\)\( extends StringEnumValue {
\(\(\1  .*\)?
\)*?\)\1  \([A-Z0-9_]+\)\(?:[,;]?\)\(
\(\(\1  .*\)?
\)*\1}\)

=>

\1\2class \4\5\1  \2\4 \8 = type.createAndRegister("\8");\9

3. convert subfielded values to fields

\( *\)\(\(?:\w+ \)*\)class \(\w+\)\( extends StringEnumValue {
\(?:\(?:\1  .*\)?
\)*?\)\1  \([A-Z0-9_]+\)(\(.+\))\(?:[,;]?\)\(
\(?:\(?:\1  .*\)?
\)*\)\1  \3\((\(\w+\) \w+) {
\(?:\(?:\1  .*\)?
\)*\1  .+ \9 get\(\w+\)() {
\(?:\(?:\1  .*\)?
\)*\1}\)

=>

\1\2class \3\4\1  \2\3 \5 = type.createAndRegister("\5").set\,(match-string 10)(\6);\7\1  \3\8

4. convert subfield constructor to setter

\( *\)\(\(?:\w+ \)*\)class \(\w+\)\( extends StringEnumValue {
\(?:\(?:\1  .*\)?
\)*?\)\1  \3\((\(\w+\) \w+) {
\(?:\(?:\1  .*\)?
\)*?\)\(\1  }
\(?:\(?:\1  .*\)?
\)*\1  .+ \6 get\(\w+\)() {
\(?:\(?:\1  .*\)?
\)*\1}\)

=>

\1\2class \3\4\1  private \3 set\8\5\1    return this;
\7

[coveralls]

Changes Unknown when pulling f45aebd on tcoffee-google:string_enum_bigquery into ** on GoogleCloudPlatform:master**.

[coveralls]

Changes Unknown when pulling f45aebd on tcoffee-google:string_enum_bigquery into ** on GoogleCloudPlatform:master**.

[tcoffee-google]

Addresses #1944.