JAVA：将大型配置文件加载到代码中-如何存储它？

Question

I have big configuration file to my bukkit plugin but I don't know how to create a config class for it. If I create one class with that amount of variables then is hard to use and read/edit.

So I have new idea using inner-clesses but how about performance etc?

That example configuration file: (in YAML, and the real configuration file is much bigger) http://pastebin.com/09WMq5qG

And my code to that example:

public class Cfg {
    protected General general;
    protected General2 general2;

    public Cfg(ConfigurationSection cfg) {
        general = new General(cfg.getConfigurationSection("General"));
        general2 = new General2(cfg.getConfigurationSection("General2"));
    }

    public class General {
        protected Gen2 gen2;
        protected Gen5 gen5;

        protected int op1;
        protected String op2;

        public General(ConfigurationSection general) {
            this.op1 = general.getInt("op1");
            this.op2 = general.getString("op2");
            gen2 = new Gen2(general.getConfigurationSection("Gen2"));
            gen5 = new Gen5(general.getConfigurationSection("Gen5"));
        }

        public class Gen2 {
            protected Gen3 gen3;
            protected Gen4 gen4;

            protected int lol;
            protected String edrd;

            public Gen2(ConfigurationSection gen2) {
                this.lol = gen2.getInt("lol");
                this.edrd = gen2.getString("edrd");
                gen3 = new Gen3(gen2.getConfigurationSection("Gen3"));
                gen4 = new Gen4(gen2.getConfigurationSection("Gen4"));
            }

            public class Gen3 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen3(ConfigurationSection gen3) {
                    this.dsdgdf = gen3.getInt("dsdgdf");
                    this.djkw4g = gen3.getString("djkw4g");
                }
            }

            public class Gen4 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen4(ConfigurationSection gen4) {
                    this.dsdgdf = gen4.getInt("dsdgdf");
                    this.djkw4g = gen4.getString("djkw4g");
                }
            }
        }

        public class Gen5 {
            protected Gen6 gen6;
            protected Gen7 gen7;

            protected int lol;
            protected String edrd;

            public Gen5(ConfigurationSection gen5) {
                this.lol = gen5.getInt("lol");
                this.edrd = gen5.getString("edrd");
                gen6 = new Gen6(gen5.getConfigurationSection("Gen6"));
                gen7 = new Gen7(gen5.getConfigurationSection("Gen7"));
            }

            public class Gen6 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen6(ConfigurationSection gen6) {
                    this.dsdgdf = gen6.getInt("dsdgdf");
                    this.djkw4g = gen6.getString("djkw4g");
                }
            }

            public class Gen7 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen7(ConfigurationSection gen7) {
                    this.dsdgdf = gen7.getInt("dsdgdf");
                    this.djkw4g = gen7.getString("djkw4g");
                }
            }
        }
    }

    public class General2 {
        protected Gen2 gen2;
        protected Gen5 gen5;

        protected int op1;
        protected String op2;

        public General2(ConfigurationSection general2) {
            this.op1 = general2.getInt("op1");
            this.op2 = general2.getString("op2");
            gen2 = new Gen2(general2.getConfigurationSection("Gen2"));
            gen5 = new Gen5(general2.getConfigurationSection("Gen5"));
        }

        public class Gen2 {
            protected Gen3 gen3;
            protected Gen4 gen4;

            protected int lol;
            protected String edrd;

            public Gen2(ConfigurationSection gen2) {
                this.lol = gen2.getInt("lol");
                this.edrd = gen2.getString("edrd");
                gen3 = new Gen3(gen2.getConfigurationSection("Gen3"));
                gen4 = new Gen4(gen2.getConfigurationSection("Gen4"));
            }

            public class Gen3 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen3(ConfigurationSection gen3) {
                    this.dsdgdf = gen3.getInt("dsdgdf");
                    this.djkw4g = gen3.getString("djkw4g");
                }
            }

            public class Gen4 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen4(ConfigurationSection gen4) {
                    this.dsdgdf = gen4.getInt("dsdgdf");
                    this.djkw4g = gen4.getString("djkw4g");
                }
            }
        }

        public class Gen5 {
            protected Gen6 gen6;
            protected Gen7 gen7;

            protected int lol;
            protected String edrd;

            public Gen5(ConfigurationSection gen5) {
                this.lol = gen5.getInt("lol");
                this.edrd = gen5.getString("edrd");
                gen6 = new Gen6(gen5.getConfigurationSection("Gen6"));
                gen7 = new Gen7(gen5.getConfigurationSection("Gen7"));
            }

            public class Gen6 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen6(ConfigurationSection gen6) {
                    this.dsdgdf = gen6.getInt("dsdgdf");
                    this.djkw4g = gen6.getString("djkw4g");
                }
            }

            public class Gen7 {
                protected int dsdgdf;
                protected String djkw4g;

                public Gen7(ConfigurationSection gen7) {
                    this.dsdgdf = gen7.getInt("dsdgdf");
                    this.djkw4g = gen7.getString("djkw4g");
                }
            }
        }
    }
}

Using this is easier for me than storing all variables in one class but how about performance? That will be good method or just slow down the code?

//Sorry for my English.

Answer 1

What you could do: Load the configuration file and store the whole content in one variabel (array, ArrayList, List, Hashmap, whatever suits your particular needs). After this, all your classes are able to read it. You can either enforce a clear order in your configuration file content, so that parts of your program know exactly, for example, in which line/array index range they have to search for the information they need. You could also define a method which distributes all the configuration details to previously initialized parts of your program. It is all up to you. Because you didn't pointed out preciyle what you intend to do I can't do in much more detail here either.

However, I would suggest that you stay away from creating classes inside classes inside classes and so on. Java gives you great object-oriented tools to help you organize your code in small readable portions.