--- /dev/null
+/*\r
+\r
+ Derby - Class org.apache.derby.iapi.services.io.ArrayUtil\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.sanity.SanityManager;\r
+import java.io.ObjectOutput;\r
+import java.io.ObjectInput;\r
+import java.io.IOException;\r
+import java.lang.reflect.Array;\r
+\r
+/**\r
+ Utility class for constructing and reading and writing arrays from/to\r
+ formatId streams.\r
+ \r
+ @version 0.1\r
+ */\r
+public abstract class ArrayUtil\r
+{\r
+ ///////////////////////////////////////////////////////////////////\r
+ //\r
+ // Methods for Arrays of OBJECTS. Cannot be used for an\r
+ // array of primitives, see below for something for primitives\r
+ //\r
+ ///////////////////////////////////////////////////////////////////\r
+ /**\r
+ Write the length of an array of objects to an output stream.\r
+\r
+ The length\r
+\r
+ @param out ObjectOutput stream\r
+ @param a array of objects whose length should be written.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeArrayLength(ObjectOutput out, Object[] a)\r
+ throws IOException\r
+ {\r
+ out.writeInt(a.length);\r
+ }\r
+\r
+ /**\r
+ Write an array of objects to an output stream.\r
+\r
+ @param out Object output stream to write to.\r
+ @param a array of objects to write.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeArrayItems(ObjectOutput out, Object[] a)\r
+ throws IOException\r
+ {\r
+ if (a == null)\r
+ return;\r
+\r
+ for(int ix = 0; ix < a.length; ix++)\r
+ { out.writeObject(a[ix]); }\r
+ }\r
+\r
+ /**\r
+ Write an array of objects and length to an output stream.\r
+ Does equivalent of writeArrayLength() followed by writeArrayItems()\r
+\r
+ @param out Object output stream to write to.\r
+ @param a array of objects to write.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeArray(ObjectOutput out, Object[] a)\r
+ throws IOException\r
+ {\r
+ if (a == null) \r
+ {\r
+ out.writeInt(0);\r
+ return;\r
+ }\r
+\r
+ out.writeInt(a.length);\r
+ for(int ix = 0; ix < a.length; ix++)\r
+ { out.writeObject(a[ix]); }\r
+ }\r
+\r
+ /**\r
+ Read an array of objects out of a stream.\r
+\r
+ @param in Input stream\r
+ @param a array to read into\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ @exception java.lang.ClassNotFoundException The Class for an Object we are reading does not exist\r
+ */\r
+ public static void readArrayItems(ObjectInput in, Object[] a)\r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ for (int ix=0; ix<a.length; ix++)\r
+ {\r
+ a[ix]=in.readObject();\r
+ }\r
+ }\r
+\r
+ /**\r
+ Read the length of an array of objects in an object stream.\r
+\r
+ @param in Input stream.\r
+\r
+ @return length of the array of objects\r
+ \r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static int readArrayLength(ObjectInput in)\r
+ throws IOException\r
+ {\r
+ return in.readInt();\r
+ }\r
+\r
+ /**\r
+ Reads an array of objects from the stream.\r
+\r
+ @param in Input stream\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ @exception java.lang.ClassNotFoundException The Class for an Object we are reading does not exist\r
+ */\r
+ public static Object[] readObjectArray(ObjectInput in)\r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ int size = in.readInt();\r
+ if ( size == 0 ) { return null; }\r
+\r
+ Object[] result = new Object[ size ];\r
+\r
+ readArrayItems( in, result );\r
+\r
+ return result;\r
+ }\r
+\r
+ ///////////////////////////////////////////////////////////////////\r
+ //\r
+ // Methods for Arrays of INTs\r
+ //\r
+ ///////////////////////////////////////////////////////////////////\r
+\r
+ /**\r
+ Write an array of integers to an ObjectOutput. This writes the array\r
+ in a format readIntArray understands.\r
+\r
+ @param out the ObjectOutput.\r
+ @param a the array.\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeIntArray(ObjectOutput out, int[] a) throws IOException {\r
+ if (a == null)\r
+ out.writeInt(0);\r
+ else {\r
+ out.writeInt(a.length);\r
+ for (int i=0; i<a.length; i++)\r
+ out.writeInt(a[i]);\r
+ }\r
+ }\r
+\r
+ /**\r
+ Read an array of integers from an ObjectInput. This allocates the\r
+ array.\r
+\r
+ @param in the ObjectInput.\r
+ @return the array of integers.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static int[] readIntArray(ObjectInput in) throws IOException {\r
+ int length = in.readInt();\r
+ if (length == 0)\r
+ return null;\r
+ int[] a = new int[length];\r
+ for (int i=0; i<length; i++)\r
+ a[i] = in.readInt();\r
+ return a;\r
+ }\r
+\r
+ public static void writeInts( ObjectOutput out, int[][] val )\r
+ throws IOException\r
+ {\r
+ if (val == null)\r
+ {\r
+ out.writeBoolean(false);\r
+ }\r
+ else\r
+ {\r
+ out.writeBoolean(true);\r
+\r
+ int count = val.length;\r
+ out.writeInt( count );\r
+\r
+ for (int i = 0; i < count; i++)\r
+ {\r
+ ArrayUtil.writeIntArray( out, val[i] );\r
+ }\r
+ }\r
+ }\r
+\r
+ public static int[][] readInts( ObjectInput in )\r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ int[][] retVal = null;\r
+\r
+ if ( in.readBoolean() )\r
+ {\r
+ int count = in.readInt();\r
+\r
+ retVal = new int[ count ][];\r
+\r
+ for (int i = 0; i < count; i++)\r
+ {\r
+ retVal[ i ] = ArrayUtil.readIntArray( in );\r
+ }\r
+ }\r
+\r
+ return retVal;\r
+ }\r
+\r
+ public static String toString(int[] value)\r
+ {\r
+ String ret_val;\r
+\r
+ if (value == null || value.length == 0)\r
+ {\r
+ ret_val = "null";\r
+ }\r
+ else\r
+ {\r
+ ret_val = "";\r
+ for (int i = 0; i < value.length; i++)\r
+ {\r
+ ret_val += "[" + value[i] + "],";\r
+ }\r
+ }\r
+ return(ret_val);\r
+ }\r
+\r
+\r
+ ///////////////////////////////////////////////////////////////////\r
+ //\r
+ // Methods for Arrays of LONGs\r
+ //\r
+ ///////////////////////////////////////////////////////////////////\r
+\r
+ /**\r
+ Write an array of longs to an ObjectOutput. This writes the array\r
+ in a format readLongArray understands.\r
+\r
+ @param out the ObjectOutput.\r
+ @param a the array.\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeLongArray(ObjectOutput out, long[] a) throws IOException {\r
+ if (a == null)\r
+ out.writeInt(0);\r
+ else {\r
+ out.writeInt(a.length);\r
+ for (int i=0; i<a.length; i++)\r
+ out.writeLong(a[i]);\r
+ }\r
+ }\r
+\r
+ /**\r
+ Read an array of integers from an ObjectInput. This allocates the\r
+ array.\r
+\r
+ @param in the ObjectInput.\r
+ @return the array of integers.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static long[] readLongArray(ObjectInput in) throws IOException {\r
+ int length = in.readInt();\r
+ long[] a = new long[length];\r
+ for (int i=0; i<length; i++)\r
+ a[i] = in.readLong();\r
+ return a;\r
+ }\r
+\r
+ /**\r
+ Read an array of strings from an ObjectInput. This allocates the\r
+ array.\r
+\r
+ @param in the ObjectInput.\r
+ @return the array of integers.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static String[] readStringArray(ObjectInput in) \r
+ throws IOException, ClassNotFoundException\r
+ {\r
+ Object[] objArray = readObjectArray(in);\r
+ int size = 0;\r
+\r
+ if (objArray == null)\r
+ return null;\r
+\r
+ String[] stringArray = new String[size = objArray.length];\r
+\r
+ for (int i = 0; i < size; i++)\r
+ {\r
+ stringArray[i] = (String)objArray[i];\r
+ } \r
+\r
+ return stringArray;\r
+ }\r
+ \r
+ ///////////////////////////////////////////////////////////////////\r
+ //\r
+ // Methods for Arrays of BOOLEANS\r
+ //\r
+ ///////////////////////////////////////////////////////////////////\r
+\r
+ /**\r
+ Write an array of booleans to an ObjectOutput. This writes the array\r
+ in a format readBooleanArray understands.\r
+\r
+ @param out the ObjectOutput.\r
+ @param a the array.\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static void writeBooleanArray(ObjectOutput out, boolean[] a) throws IOException {\r
+ if (a == null)\r
+ out.writeInt(0);\r
+ else {\r
+ out.writeInt(a.length);\r
+ for (int i=0; i<a.length; i++)\r
+ out.writeBoolean(a[i]);\r
+ }\r
+ }\r
+\r
+ /**\r
+ Read an array of integers from an ObjectInput. This allocates the\r
+ array.\r
+\r
+ @param in the ObjectInput.\r
+ @return the array of integers.\r
+\r
+ @exception java.io.IOException The write caused an IOException. \r
+ */\r
+ public static boolean[] readBooleanArray(ObjectInput in) throws IOException {\r
+ int length = in.readInt();\r
+ boolean[] a = new boolean[length];\r
+ for (int i=0; i<length; i++)\r
+ a[i] = in.readBoolean();\r
+ return a;\r
+ }\r
+}\r
projects / Benchmarks_CSolver.git / blobdiff