Fix for LDAP-76: Add abstract ContextMapper implementation

spring-ldap-tiger/src/main/java/org/springframework/ldap/core/simple/AbstractParametrizedContextMapper.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2005-2007 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.ldap.core.simple;
+
+import org.springframework.ldap.core.DirContextOperations;
+
+/**
+ * Abstract superclass that may be used instead of implementing
+ * {@link ParametrizedContextMapper} directly. Subclassing from this superclass,
+ * the supplied context will be automatically cast to
+ * <code>DirContextOperations</code>. Note that if you use your own
+ * <code>DirObjectFactory</code>, this implementation will fail with a
+ * <code>ClassCastException</code>.
+ * 
+ * @author Mattias Arthursson
+ * 
+ */
+public abstract class AbstractParametrizedContextMapper<T> implements ParametrizedContextMapper<T> {
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.springframework.ldap.core.ContextMapper#mapFromContext(java.lang.Object)
+	 */
+	public final T mapFromContext(Object ctx) {
+		return doMapFromContext((DirContextOperations) ctx);
+	}
+
+	/**
+	 * Map a single <code>DirContextOperation</code> to an object. The
+	 * supplied instance is the object supplied to
+	 * {@link #mapFromContext(Object)} cast to a
+	 * <code>DirContextOperations</code>.
+	 * 
+	 * @param ctx the context to map to an object.
+	 * @return an object built from the data in the context.
+	 */
+	protected abstract T doMapFromContext(DirContextOperations operations);
+
+}

spring-ldap/src/main/java/org/springframework/ldap/core/support/AbstractContextMapper.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2005-2007 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.ldap.core.support;
+
+import org.springframework.ldap.core.ContextMapper;
+import org.springframework.ldap.core.DirContextOperations;
+
+/**
+ * Abstract superclass that may be used instead of implementing
+ * {@link ContextMapper} directly. Subclassing from this superclass, the
+ * supplied context will be automatically cast to
+ * <code>DirContextOperations</code>. Note that if you use your own
+ * <code>DirObjectFactory</code>, this implementation will fail with a
+ * <code>ClassCastException</code>.
+ * 
+ * @author Mattias Arthursson
+ * 
+ */
+public abstract class AbstractContextMapper implements ContextMapper {
+
+    /*
+     * (non-Javadoc)
+     * 
+     * @see org.springframework.ldap.core.ContextMapper#mapFromContext(java.lang.Object)
+     */
+    public final Object mapFromContext(Object ctx) {
+        return doMapFromContext((DirContextOperations) ctx);
+    }
+
+    /**
+     * Map a single <code>DirContextOperation</code> to an object. The
+     * supplied instance is the object supplied to
+     * {@link #mapFromContext(Object)} cast to a
+     * <code>DirContextOperations</code>.
+     * 
+     * @param ctx
+     *            the context to map to an object.
+     * @return an object built from the data in the context.
+     */
+    protected abstract Object doMapFromContext(DirContextOperations operations);
+
+}