Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 257 insertions, 0 deletions

diff --git a/qpid/cpp/examples/messaging/OptionParser.cpp b/qpid/cpp/examples/messaging/OptionParser.cpp
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+++ b/qpid/cpp/examples/messaging/OptionParser.cpp
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+/*
+ *
+ * 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.
+ *
+ */
+#include "OptionParser.h"
+#include <qpid/types/Exception.h>
+#include <algorithm>
+#include <iostream>
+#include <iomanip>
+#include <sstream>
+#include <cstdlib>
+
+class Option
+{
+  public:
+    Option(const std::string& name, const std::string& description);
+    virtual ~Option() {}
+    virtual void setValue(const std::string&) = 0;
+    virtual bool isValueExpected() = 0;
+    bool match(const std::string&);
+    std::ostream& print(std::ostream& out);
+  private:
+    std::string longName;
+    std::string shortName;
+    std::string description;
+    std::ostream& printNames(std::ostream& out);
+  friend class OptionParser;
+};
+
+class StringOption : public Option
+{
+  public:
+    StringOption(const std::string& name, const std::string& description, std::string& v) : Option(name, description), value(v) {}
+    void setValue(const std::string& v) { value = v; }
+    bool isValueExpected() { return true; }
+  private:
+    std::string& value;
+};
+
+class IntegerOption : public Option
+{
+  public:
+    IntegerOption(const std::string& name, const std::string& description, int& v) : Option(name, description), value(v) {}
+    void setValue(const std::string& v) { value = atoi(v.c_str()); }
+    bool isValueExpected() { return true; }
+  private:
+    int& value;
+};
+
+class BooleanOption : public Option
+{
+  public:
+    BooleanOption(const std::string& name, const std::string& description, bool& v) : Option(name, description), value(v) {}
+    void setValue(const std::string&) { value = true; }
+    bool isValueExpected() { return false; }
+  private:
+    bool& value;
+};
+
+class MultiStringOption : public Option
+{
+  public:
+    MultiStringOption(const std::string& name, const std::string& description, std::vector<std::string>& v) : Option(name, description), value(v) {}
+    void setValue(const std::string& v) { value.push_back(v); }
+    bool isValueExpected() { return true; }
+  private:
+    std::vector<std::string>& value;
+};
+
+class OptionMatch
+{
+  public:
+    OptionMatch(const std::string& argument);
+    bool operator()(Option* option);
+    bool isOption();
+  private:
+    std::string name;
+};
+
+class OptionsError : public qpid::types::Exception
+{
+  public:
+    OptionsError(const std::string& message) : qpid::types::Exception(message) {}
+};
+
+Option::Option(const std::string& name, const std::string& desc) : description(desc)
+{
+    std::string::size_type i = name.find(",");
+    if (i != std::string::npos) {
+        longName = name.substr(0, i);
+        if (i + 1 < name.size())
+            shortName = name.substr(i+1);
+    } else {
+        longName = name;
+    }
+}
+
+bool Option::match(const std::string& name)
+{
+    return name == longName || name == shortName;
+}
+
+std::ostream& Option::printNames(std::ostream& out)
+{
+    if (shortName.size()) {
+        out << "-" << shortName;
+        if (isValueExpected()) out << " VALUE";
+        out << ", --" << longName;
+        if (isValueExpected()) out << " VALUE";
+    } else {
+        out << "--" << longName;
+        if (isValueExpected()) out << " VALUE";
+    }
+    return out;
+}
+
+std::ostream& Option::print(std::ostream& out)
+{
+    std::stringstream names;
+    printNames(names);
+    out << std::setw(30) << std::left << names.str() << description << std::endl;
+    return out;
+}
+
+std::vector<std::string>& OptionParser::getArguments() { return arguments; }
+
+void OptionParser::add(Option* option)
+{
+    options.push_back(option);
+}
+
+void OptionParser::add(const std::string& name, std::string& value, const std::string& description)
+{
+    add(new StringOption(name, description, value));
+}
+void OptionParser::add(const std::string& name, int& value, const std::string& description)
+{
+    add(new IntegerOption(name, description, value));
+}
+void OptionParser::add(const std::string& name, bool& value, const std::string& description)
+{
+    add(new BooleanOption(name, description, value));
+}
+void OptionParser::add(const std::string& name, std::vector<std::string>& value, const std::string& description)
+{
+    add(new MultiStringOption(name, description, value));
+}
+
+OptionMatch::OptionMatch(const std::string& argument)
+{
+    if (argument.find("--") == 0) {
+        name = argument.substr(2);
+    } else if (argument.find("-") == 0) {
+        name = argument.substr(1);
+    }
+}
+
+bool OptionMatch::operator()(Option* option)
+{
+    return option->match(name);
+}
+
+bool OptionMatch::isOption()
+{
+    return name.size() > 0;
+}
+
+OptionParser::OptionParser(const std::string& s, const std::string& d) : summary(s), description(d), help(false)
+{
+    add("help,h", help, "show this message");
+}
+
+Option* OptionParser::getOption(const std::string& argument)
+{
+    OptionMatch match(argument);
+    if (match.isOption()) {
+        Options::iterator i = std::find_if(options.begin(), options.end(), match);
+        if (i == options.end()) {
+            std::stringstream error;
+            error << "Unrecognised option: " << argument;
+            throw OptionsError(error.str());
+        } else {
+            return *i;
+        }        
+    } else {
+        return 0;
+    }
+}
+
+void OptionParser::error(const std::string& message)
+{
+    std::cout << summary << std::endl << std::endl;
+    std::cerr << "Error: " << message << "; try --help for more information" << std::endl;
+}
+
+bool OptionParser::parse(int argc, char** argv)
+{
+    try {
+        for (int i = 1; i < argc; ++i) {
+            std::string argument = argv[i];
+            Option* o = getOption(argument);
+            if (o) {
+                if (o->isValueExpected()) {
+                    if (i + 1 < argc) {
+                        o->setValue(argv[++i]);
+                    } else {
+                        std::stringstream error;
+                        error << "Value expected for option " << o->longName;
+                        throw OptionsError(error.str());
+                    }
+                } else {
+                    o->setValue("");
+                }
+            } else {
+                arguments.push_back(argument);
+            }
+        }
+        if (help) {
+            std::cout << summary << std::endl << std::endl;
+            std::cout << description << std::endl << std::endl;
+            std::cout << "Options: " << std::endl;
+            for (Options::iterator i = options.begin(); i != options.end(); ++i) {
+                (*i)->print(std::cout);
+            }
+            return false;
+        } else {
+            return true;
+        }
+    } catch (const std::exception& e) {
+        error(e.what());
+        return false;
+    }
+}
+
+
+OptionParser::~OptionParser()
+{
+    for (Options::iterator i = options.begin(); i != options.end(); ++i) {        
+        delete *i;
+    }
+}