001/* AnySeqHelper.java -- 002 Copyright (C) 2005, 2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package org.omg.CORBA; 040 041import gnu.CORBA.typecodes.ArrayTypeCode; 042 043import org.omg.CORBA.TypeCodePackage.BadKind; 044import org.omg.CORBA.portable.InputStream; 045import org.omg.CORBA.portable.OutputStream; 046import org.omg.CORBA.portable.Streamable; 047 048/** 049 * Provides static helper methods for working with 050 * the array of the type {@link Any} (not with the "any array"). 051 * 052 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) 053 */ 054public abstract class AnySeqHelper 055{ 056 /** 057 * Extract the array of {@link Any}'s from the 058 * given {@link Any}. This implementation expects the 059 * {@link Any} to hold the instance of {@link AnySeqHolder} 060 * that is returned by {@link Any#extract_Streamable() }. 061 * 062 * @param a an Any to extract the array from. 063 * 064 * @return the extracted array. 065 * 066 * @throws ClassCastException if the Any contains something other than the 067 * the {@link AnySeqHolder}. 068 */ 069 public static Any[] extract(Any a) 070 { 071 AnySeqHolder h = (AnySeqHolder) a.extract_Streamable(); 072 return h.value; 073 } 074 075 /** 076 * Returns the agreed Id, delegating functionality to 077 * the {@link #type()}.id(). 078 */ 079 public static String id() 080 { 081 try 082 { 083 return type().id(); 084 } 085 catch (BadKind ex) 086 { 087 // Should never happen under correct work. 088 throw new Error("Please report this bug.", ex); 089 } 090 } 091 092 /** 093 * Insert into the given {@link Any}[] into the 094 * given {@link Any}. This implementation first creates 095 * a {@link AnySeqHolder} and then calls 096 * {@link Any#insert_Streamable(Streamable)}. 097 * 098 * @param into the target Any. 099 * @param that the array to insert. 100 */ 101 public static void insert(Any into, Any[] that) 102 { 103 AnySeqHolder holder = new AnySeqHolder(that); 104 into.insert_Streamable(holder); 105 } 106 107 /** 108 * Reads the {@link Any}[] from the CORBA input stream. 109 * This implementation first creates an instance of 110 * {@link AnySeqHolder} and then delegates functionality 111 * to its <code>_read()</code> method. 112 * 113 * @param input the CORBA (not java.io) stream to read from. 114 * @return the value from the stream. 115 */ 116 public static Any[] read(InputStream input) 117 { 118 Any[] value = new Any[ input.read_long() ]; 119 for (int i = 0; i < value.length; i++) 120 { 121 value [ i ] = input.read_any(); 122 } 123 return value; 124 } 125 126 /** 127 * Creates and returns a new instance of the TypeCode, 128 * corresponding the array of {@link Any}'s. 129 * The length of the sequence is left with the initial 130 * value 0. 131 */ 132 public static TypeCode type() 133 { 134 return new ArrayTypeCode(TCKind.tk_any); 135 } 136 137 /** 138 * Writes the array of {@link Any}'s into the given stream. 139 * 140 * @param output the CORBA (not java.io) output stream to write. 141 * @param value the value that must be written. 142 */ 143 public static void write(OutputStream output, Any[] value) 144 { 145 output.write_long(value.length); 146 147 for (int i = 0; i < value.length; i++) 148 { 149 output.write_any(value [ i ]); 150 } 151 } 152}