--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.iapi.services.io.FormatableArrayHolder\r
+\r
+ Licensed to the Apache Software Foundation (ASF) under one or more\r
+ contributor license agreements. See the NOTICE file distributed with\r
+ this work for additional information regarding copyright ownership.\r
+ The ASF licenses this file to you under the Apache License, Version 2.0\r
+ (the "License"); you may not use this file except in compliance with\r
+ the License. You may obtain a copy of the License at\r
+\r
+ http://www.apache.org/licenses/LICENSE-2.0\r
+\r
+ Unless required by applicable law or agreed to in writing, software\r
+ distributed under the License is distributed on an "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ See the License for the specific language governing permissions and\r
+ limitations under the License.\r
+\r
+ */\r
+\r
+package org.apache.derby.iapi.services.io;\r
+\r
+import org.apache.derby.iapi.services.io.ArrayInputStream;\r
+\r
+import org.apache.derby.iapi.services.io.StoredFormatIds;\r
+import org.apache.derby.iapi.services.io.FormatIdUtil;\r
+import org.apache.derby.iapi.services.io.ArrayUtil;\r
+import org.apache.derby.iapi.services.io.Formatable;\r
+\r
+import org.apache.derby.iapi.services.sanity.SanityManager;\r
+\r
+import java.io.ObjectOutput;\r
+import java.io.ObjectInput;\r
+import java.io.IOException;\r
+\r
+import java.lang.reflect.Array;\r
+\r
+/**\r
+ * A formatable holder for an array of formatables.\r
+ * Used to avoid serializing arrays.\r
+ */\r
+public class FormatableArrayHolder implements Formatable\r
+{\r
+ /********************************************************\r
+ **\r
+ ** This class implements Formatable. That means that it\r
+ ** can write itself to and from a formatted stream. If\r
+ ** you add more fields to this class, make sure that you\r
+ ** also write/read them with the writeExternal()/readExternal()\r
+ ** methods.\r
+ **\r
+ ** If, inbetween releases, you add more fields to this class,\r
+ ** then you should bump the version number emitted by the getTypeFormatId()\r
+ ** method.\r
+ **\r
+ ********************************************************/\r
+\r
+ // the array\r
+ private Object[] array;\r
+ \r
+ /**\r
+ * Niladic constructor for formatable\r
+ */\r
+ public FormatableArrayHolder() \r
+ {\r
+ }\r
+\r
+ /**\r
+ * Construct a FormatableArrayHolder using the input\r
+ * array.\r
+ *\r
+ * @param array the array to hold\r
+ */\r
+ public FormatableArrayHolder(Object[] array)\r
+ {\r
+ if (SanityManager.DEBUG)\r
+ {\r
+ SanityManager.ASSERT(array != null, \r
+ "array input to constructor is null, code can't handle this.");\r
+ }\r
+\r
+ this.array = array;\r
+ }\r
+\r
+ /**\r
+ * Set the held array to the input array.\r
+ *\r
+ * @param array the array to hold\r
+ */\r
+ public void setArray(Object[] array)\r
+ {\r
+ if (SanityManager.DEBUG)\r
+ {\r
+ SanityManager.ASSERT(array != null, \r
+ "array input to setArray() is null, code can't handle this.");\r
+ }\r
+\r
+ this.array = array;\r
+ }\r
+\r
+ /**\r
+ * Get the held array of formatables, and return\r
+ * it in an array of type inputClass.\r
+ *\r
+ * @param inputClass the class to use for the returned array\r
+ *\r
+ * @return an array of formatables\r
+ */\r
+ public Object[] getArray(Class inputClass)\r
+ {\r
+ Object[] outArray = (Object[])Array.newInstance(inputClass, array.length);\r
+ \r
+ /*\r
+ ** HACK: on as400 the following arraycopy() throws an\r
+ ** ArrayStoreException because the output array isn't\r
+ ** assignment compatible with the input array. This\r
+ ** is a bug on as400, but to get around it we are\r
+ ** going to do an element by element copy.\r
+ */\r
+ //System.arraycopy(array, 0, outArray, 0, outArray.length);\r
+ for (int i = 0; i < outArray.length; i++)\r
+ {\r
+ outArray[i] = array[i];\r
+ }\r
+\r
+ return outArray;\r
+ }\r
+\r
+ //////////////////////////////////////////////\r
+ //\r
+ // FORMATABLE\r
+ //\r
+ //////////////////////////////////////////////\r
+ /**\r
+ * Write this array out\r
+ *\r
+ * @param out write bytes here\r
+ *\r
+ * @exception IOException thrown on error\r
+ */\r
+ public void writeExternal(ObjectOutput out) throws IOException\r
+ {\r
+ if (SanityManager.DEBUG)\r
+ {\r
+ SanityManager.ASSERT(array != null, "Array is null, which isn't expected");\r
+ }\r
+\r
+ ArrayUtil.writeArrayLength(out, array);\r
+ ArrayUtil.writeArrayItems(out, array);\r
+ }\r
+\r
+ /**\r
+ * Read this array from a stream of stored objects.\r
+ *\r
+ * @param in read this.\r
+ *\r
+ * @exception IOException thrown on error\r
+ * @exception ClassNotFoundException thrown on error\r
+ */\r
+ public void readExternal(ObjectInput in)\r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ array = new Object[ArrayUtil.readArrayLength(in)];\r
+ ArrayUtil.readArrayItems(in, array);\r
+ }\r
+ public void readExternal(ArrayInputStream in)\r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ array = new Formatable[ArrayUtil.readArrayLength(in)];\r
+ ArrayUtil.readArrayItems(in, array);\r
+ }\r
+ \r
+ \r
+ /**\r
+ * Get the formatID which corresponds to this class.\r
+ *\r
+ * @return the formatID of this class\r
+ */\r
+ public int getTypeFormatId() { return StoredFormatIds.FORMATABLE_ARRAY_HOLDER_V01_ID; }\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff