Fix P tangle

Issue: gh-4636

core/src/main/java/org/springframework/security/access/method/P.java

@@ -32,10 +32,12 @@ import org.springframework.security.core.parameters.AnnotationParameterNameDisco
  *
  * @author Rob Winch
  * @since 3.2
+ * @deprecated use @{code org.springframework.security.core.parameters.P}
  */
 @Target(ElementType.PARAMETER)
 @Retention(RetentionPolicy.RUNTIME)
 @Documented
+@Deprecated
 public @interface P {
 
 	/**

core/src/main/java/org/springframework/security/core/parameters/DefaultSecurityParameterNameDiscoverer.java

@@ -26,7 +26,6 @@ import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.core.LocalVariableTableParameterNameDiscoverer;
 import org.springframework.core.ParameterNameDiscoverer;
 import org.springframework.core.PrioritizedParameterNameDiscoverer;
-import org.springframework.security.access.method.P;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 
@@ -83,6 +82,7 @@ public class DefaultSecurityParameterNameDiscoverer extends
 		}
 
 		Set<String> annotationClassesToUse = new HashSet<String>(2);
+		annotationClassesToUse.add("org.springframework.security.access.method.P");
 		annotationClassesToUse.add(P.class.getName());
 		if (DATA_PARAM_PRESENT) {
 			annotationClassesToUse.add(DATA_PARAM_CLASSNAME);

core/src/main/java/org/springframework/security/core/parameters/P.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2002-2017 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.security.core.parameters;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * An annotation that can be used along with {@link AnnotationParameterNameDiscoverer} to
+ * specify parameter names. This is useful for interfaces prior to JDK 8 which cannot
+ * contain the parameter names.
+ *
+ * @see AnnotationParameterNameDiscoverer
+ *
+ * @author Rob Winch
+ * @since 5.0
+ */
+@Target(ElementType.PARAMETER)
+@Retention(RetentionPolicy.RUNTIME)
+@Documented
+public @interface P {
+
+	/**
+	 * The parameter name
+	 * @return
+	 */
+	String value();
+}

core/src/test/java/org/springframework/security/core/parameters/DefaultSecurityParameterNameDiscovererTests.java

@@ -26,7 +26,6 @@ import org.junit.Test;
 import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.core.LocalVariableTableParameterNameDiscoverer;
 import org.springframework.core.ParameterNameDiscoverer;
-import org.springframework.security.access.method.P;
 import org.springframework.test.util.ReflectionTestUtils;
 
 /**
@@ -54,7 +53,7 @@ public class DefaultSecurityParameterNameDiscovererTests {
 		assertThat(annotationDisc).isInstanceOf(AnnotationParameterNameDiscoverer.class);
 		Set<String> annotationsToUse = (Set<String>) ReflectionTestUtils.getField(
 				annotationDisc, "annotationClassesToUse");
-		assertThat(annotationsToUse).containsOnly(P.class.getName());
+		assertThat(annotationsToUse).containsOnly("org.springframework.security.access.method.P", P.class.getName());
 
 		assertThat(discoverers.get(1).getClass()).isEqualTo(
 				DefaultParameterNameDiscoverer.class);
@@ -76,9 +75,9 @@ public class DefaultSecurityParameterNameDiscovererTests {
 		assertThat(annotationDisc).isInstanceOf(AnnotationParameterNameDiscoverer.class);
 		Set<String> annotationsToUse = (Set<String>) ReflectionTestUtils.getField(
 				annotationDisc, "annotationClassesToUse");
-		assertThat(annotationsToUse).containsOnly(P.class.getName());
+		assertThat(annotationsToUse).containsOnly("org.springframework.security.access.method.P", P.class.getName());
 
 		assertThat(discoverers.get(2).getClass()).isEqualTo(
 				DefaultParameterNameDiscoverer.class);
 	}
-}
+}