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-rw-r--r--sangria-core/src/main/java/com/tavianator/sangria/core/TypeLiterals.java87
1 files changed, 87 insertions, 0 deletions
diff --git a/sangria-core/src/main/java/com/tavianator/sangria/core/TypeLiterals.java b/sangria-core/src/main/java/com/tavianator/sangria/core/TypeLiterals.java
new file mode 100644
index 0000000..833f70d
--- /dev/null
+++ b/sangria-core/src/main/java/com/tavianator/sangria/core/TypeLiterals.java
@@ -0,0 +1,87 @@
+/****************************************************************************
+ * Sangria *
+ * Copyright (C) 2014 Tavian Barnes <tavianator@tavianator.com> *
+ * *
+ * 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.tavianator.sangria.core;
+
+import java.util.*;
+
+import com.google.inject.Provider;
+import com.google.inject.TypeLiteral;
+import com.google.inject.util.Types;
+
+/**
+ * Static utility functions for working with {@link TypeLiteral}s.
+ *
+ * @author Tavian Barnes (tavianator@tavianator.com)
+ * @version 1.1
+ * @since 1.1
+ */
+public class TypeLiterals {
+ private TypeLiterals() {
+ // Not for instantiating
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<List<T>> listOf(Class<T> type) {
+ return (TypeLiteral<List<T>>)TypeLiteral.get(Types.listOf(type));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<List<T>> listOf(TypeLiteral<T> type) {
+ return (TypeLiteral<List<T>>)TypeLiteral.get(Types.listOf(type.getType()));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<Set<T>> setOf(Class<T> type) {
+ return (TypeLiteral<Set<T>>)TypeLiteral.get(Types.setOf(type));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<Set<T>> setOf(TypeLiteral<T> type) {
+ return (TypeLiteral<Set<T>>)TypeLiteral.get(Types.setOf(type.getType()));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <K, V> TypeLiteral<Map<K, V>> mapOf(Class<K> keyType, Class<V> valueType) {
+ return (TypeLiteral<Map<K, V>>)TypeLiteral.get(Types.mapOf(keyType, valueType));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <K, V> TypeLiteral<Map<K, V>> mapOf(Class<K> keyType, TypeLiteral<V> valueType) {
+ return (TypeLiteral<Map<K, V>>)TypeLiteral.get(Types.mapOf(keyType, valueType.getType()));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <K, V> TypeLiteral<Map<K, V>> mapOf(TypeLiteral<K> keyType, Class<V> valueType) {
+ return (TypeLiteral<Map<K, V>>)TypeLiteral.get(Types.mapOf(keyType.getType(), valueType));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <K, V> TypeLiteral<Map<K, V>> mapOf(TypeLiteral<K> keyType, TypeLiteral<V> valueType) {
+ return (TypeLiteral<Map<K, V>>)TypeLiteral.get(Types.mapOf(keyType.getType(), valueType.getType()));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<Provider<T>> providerOf(Class<T> type) {
+ return (TypeLiteral<Provider<T>>)TypeLiteral.get(Types.providerOf(type));
+ }
+
+ @SuppressWarnings("unchecked")
+ public static <T> TypeLiteral<Provider<T>> providerOf(TypeLiteral<T> type) {
+ return (TypeLiteral<Provider<T>>)TypeLiteral.get(Types.providerOf(type.getType()));
+ }
+}