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Use an array indexed by ordinal to go from enum to name.

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jwilson
2016-01-18 16:57:07 -05:00
parent 8a5c0f387b
commit 324a59e0c9
1 changed files with 8 additions and 10 deletions
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18
moshi/src/main/java/com/squareup/moshi/StandardJsonAdapters.java
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@@ -19,7 +19,6 @@ import java.io.IOException;
import java.lang.annotation.Annotation; import java.lang.annotation.Annotation;
import java.lang.reflect.Type; import java.lang.reflect.Type;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection; import java.util.Collection;
import java.util.LinkedHashMap; import java.util.LinkedHashMap;
import java.util.List; import java.util.List;
@@ -215,21 +214,25 @@ final class StandardJsonAdapters {
static final class EnumJsonAdapter<T extends Enum<T>> extends JsonAdapter<T> { static final class EnumJsonAdapter<T extends Enum<T>> extends JsonAdapter<T> {
private final Class<T> enumType; private final Class<T> enumType;
private final Map<String, T> nameConstantMap = new LinkedHashMap<>(); private final Map<String, T> nameConstantMap;
private final String[] nameStrings;
public EnumJsonAdapter(Class<T> enumType) { public EnumJsonAdapter(Class<T> enumType) {
this.enumType = enumType; this.enumType = enumType;
try { try {
T[] constants = enumType.getEnumConstants(); T[] constants = enumType.getEnumConstants();
for (T constant : constants) { nameConstantMap = new LinkedHashMap<>();
nameStrings = new String[constants.length];
for (int i = 0; i < constants.length; i++) {
T constant = constants[i];
Json annotation = enumType.getField(constant.name()).getAnnotation(Json.class); Json annotation = enumType.getField(constant.name()).getAnnotation(Json.class);
String name = annotation != null ? annotation.name() : constant.name(); String name = annotation != null ? annotation.name() : constant.name();
nameConstantMap.put(name, constant); nameConstantMap.put(name, constant);
nameStrings[i] = name;
} }
} catch (NoSuchFieldException e) { } catch (NoSuchFieldException e) {
throw new AssertionError("Missing field in " + enumType.getName(), e); throw new AssertionError("Missing field in " + enumType.getName(), e);
} }
} }
@Override public T fromJson(JsonReader reader) throws IOException { @Override public T fromJson(JsonReader reader) throws IOException {
@@ -242,12 +245,7 @@ final class StandardJsonAdapters {
} }
@Override public void toJson(JsonWriter writer, T value) throws IOException { @Override public void toJson(JsonWriter writer, T value) throws IOException {
for (Map.Entry<String, T> entry : nameConstantMap.entrySet()) { writer.value(nameStrings[value.ordinal()]);
if (entry.getValue() == value) {
writer.value(entry.getKey());
break;
}
}
} }
@Override public String toString() { @Override public String toString() {