Added SpringFactoriesLoader

spring-core/src/test/java/org/springframework/core/DummyFactory.java

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+/*
+ * Copyright 2002-2012 the original author or authors.
+ *
+ * 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 org.springframework.core;
+
+/**
+ * Used by {@link SpringFactoriesLoaderTests}
+ *
+ * @author Arjen Poutsma
+ */
+public interface DummyFactory {
+
+	String getString();
+
+}

spring-core/src/test/java/org/springframework/core/MyDummyFactory1.java

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+/*
+ * Copyright 2002-2012 the original author or authors.
+ *
+ * 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 org.springframework.core;
+
+/**
+ * Used by {@link SpringFactoriesLoaderTests}
+ *
+ * @author Arjen Poutsma
+ */
+public class MyDummyFactory1 implements DummyFactory, Ordered {
+
+	public int getOrder() {
+		return 1;
+	}
+
+	public String getString() {
+		return "Foo";
+	}
+}

spring-core/src/test/java/org/springframework/core/MyDummyFactory2.java

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+/*
+ * Copyright 2002-2012 the original author or authors.
+ *
+ * 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 org.springframework.core;
+
+/**
+ * Used by {@link org.springframework.core.SpringFactoriesLoaderTests}
+ *
+ * @author Arjen Poutsma
+ */
+public class MyDummyFactory2 implements DummyFactory, Ordered {
+
+	public int getOrder() {
+		return 2;
+	}
+
+	public String getString() {
+		return "Bar";
+	}
+}

spring-core/src/test/java/org/springframework/core/SpringFactoriesLoaderTests.java

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+/*
+ * Copyright 2002-2012 the original author or authors.
+ *
+ * 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 org.springframework.core;
+
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import org.junit.Test;
+
+/** @author Arjen Poutsma */
+public class SpringFactoriesLoaderTests {
+
+	@Test
+	public void loadFactories() {
+		List<DummyFactory> factories = SpringFactoriesLoader
+				.loadFactories(DummyFactory.class, null,
+						"org/springframework/core/springFactoriesLoaderTests.properties");
+
+		assertEquals(2, factories.size());
+		assertTrue(factories.get(0) instanceof MyDummyFactory1);
+		assertTrue(factories.get(1) instanceof MyDummyFactory2);
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void loadInvalid() {
+		SpringFactoriesLoader.loadFactories(String.class, null,
+				"org/springframework/core/springFactoriesLoaderTests.properties");
+	}
+
+}

spring-core/src/test/resources/org/springframework/core/springFactoriesLoaderTests.properties

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+org.springframework.core.DummyFactory=org.springframework.core.MyDummyFactory2,org.springframework.core.MyDummyFactory1
+java.lang.String=org.springframework.core.MyDummyFactory1