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Diffstat (limited to 'src/org/apache/http/client/utils/CloneUtils.java')
-rw-r--r-- | src/org/apache/http/client/utils/CloneUtils.java | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/org/apache/http/client/utils/CloneUtils.java b/src/org/apache/http/client/utils/CloneUtils.java new file mode 100644 index 0000000..fec534b --- /dev/null +++ b/src/org/apache/http/client/utils/CloneUtils.java @@ -0,0 +1,75 @@ +/* + * $HeadURL:$ + * $Revision:$ + * $Date:$ + * + * ==================================================================== + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + */ +package org.apache.http.client.utils; + +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + +/** + * A collection of utilities to workaround limitations of Java clone framework. + */ +public class CloneUtils { + + public static Object clone(final Object obj) throws CloneNotSupportedException { + if (obj == null) { + return null; + } + if (obj instanceof Cloneable) { + Class<?> clazz = obj.getClass (); + Method m; + try { + m = clazz.getMethod("clone", (Class[]) null); + } catch (NoSuchMethodException ex) { + throw new NoSuchMethodError(ex.getMessage()); + } + try { + return m.invoke(obj, (Object []) null); + } catch (InvocationTargetException ex) { + Throwable cause = ex.getCause(); + if (cause instanceof CloneNotSupportedException) { + throw ((CloneNotSupportedException) cause); + } else { + throw new Error("Unexpected exception", cause); + } + } catch (IllegalAccessException ex) { + throw new IllegalAccessError(ex.getMessage()); + } + } else { + throw new CloneNotSupportedException(); + } + } + + /** + * This class should not be instantiated. + */ + private CloneUtils() { + } + +} |