Using Design Patterns

src/CliBuilder.java

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+import InputCommand.ArgStrategy;
+import InputCommand.UseSetCurrentDb;
+import InputCommand.*;
+import minidb.xmlParser.CurrentDBObserver;
+
+import java.util.ArrayList;
+
+public class CliBuilder {
+    public cli buildCli () {
+        cli c = new cli();
+
+        ArrayList<ArgStrategy> argslist = new ArrayList<>();
+        ArrayList<UseSetCurrentDb> usedInCurrentDBO = new ArrayList<>();
+
+        addArg add = new addArg();
+        argslist.add(add);
+        usedInCurrentDBO.add(add);
+
+        deleteArg delete = new deleteArg();
+        argslist.add(delete);
+        usedInCurrentDBO.add(delete);
+
+        readArg read = new readArg();
+        argslist.add(read);
+        usedInCurrentDBO.add(read);
+
+        schemaArg schema = new schemaArg();
+        argslist.add(schema);
+        usedInCurrentDBO.add(schema);
+
+        useArg use = new useArg();
+        argslist.add(use);
+//        usedInCurrentDBO.add(use);
+        CurrentDBObserver observer = new CurrentDBObserver(usedInCurrentDBO);
+        use.setCurrentDBO(observer);
+
+        dropArg drop = new dropArg();
+        argslist.add(drop);
+
+        helpArg help = new helpArg();
+        argslist.add(help);
+
+        listArg list = new listArg();
+        argslist.add(list);
+
+        newArg newA = new newArg();
+        argslist.add(newA);
+
+        c.setArgsList(argslist);
+
+        return c;
+    }
+}
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src/InputCommand/ArgStrategy.java

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+package InputCommand;
+
+public interface ArgStrategy {
+    public boolean matchArg(String arg);
+    public void execCmd (String arg);
+}

src/InputCommand/UseSetCurrentDb.java

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+package InputCommand;
+
+import minidb.xmlParser.CurrentDBObserver;
+import minidb.xmlParser.DatabaseFile;
+
+public interface UseSetCurrentDb {
+    public void setCurrentDb(String path);
+}

src/InputCommand/addArg.java

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+package InputCommand;
+
+import constants.errors;
+import minidb.xmlParser.DatabaseFile;
+
+public class addArg implements ArgStrategy, UseSetCurrentDb {
+    private DatabaseFile CurrentDb;
+
+    @Override
+    public void setCurrentDb(String path){
+        this.CurrentDb = new DatabaseFile(path);
+    }
+
+    @Override
+    public boolean matchArg(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        return cmdArgs[0].equals("add");
+    }
+
+    @Override
+    public void execCmd(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        if (CurrentDb != null) {
+            CurrentDb.addData(cmdArgs[1]);
+        } else {
+            System.out.println(errors.NO_DATABASE_SELECTED);
+        }
+    }
+}

src/InputCommand/deleteArg.java

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+package InputCommand;
+
+import constants.errors;
+import minidb.xmlParser.DatabaseFile;
+
+public class deleteArg implements ArgStrategy, UseSetCurrentDb {
+    private DatabaseFile CurrentDb;
+
+    @Override
+    public void setCurrentDb(String path){
+        this.CurrentDb = new DatabaseFile(path);
+    }
+
+    @Override
+    public boolean matchArg(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        return cmdArgs[0].equals("delete");
+    }
+
+    @Override
+    public void execCmd(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        if (CurrentDb != null) {
+            CurrentDb.deleteData(cmdArgs[1]);
+        } else {
+            System.out.println(errors.NO_DATABASE_SELECTED);
+        }
+    }
+}

src/InputCommand/dropArg.java

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+package InputCommand;
+
+import minidb.xmlParser.RegistryFile;
+
+public class dropArg implements ArgStrategy{
+    @Override
+    public boolean matchArg(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        return cmdArgs[0].equals("drop");
+    }
+
+    @Override
+    public void execCmd(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        RegistryFile registry = RegistryFile.getInstance();
+        registry.deleteDatabase(cmdArgs[1]);
+    }
+}

src/InputCommand/helpArg.java

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+package InputCommand;
+
+import constants.constants;
+
+public class helpArg implements ArgStrategy{
+    @Override
+    public boolean matchArg(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        return cmdArgs[0].equals("help;");
+    }
+
+    @Override
+    public void execCmd(String arg) {
+        System.out.println(constants.HELP_COMMANDS);
+    }
+}

src/InputCommand/listArg.java

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+package InputCommand;
+
+import minidb.xmlParser.RegistryFile;
+
+public class listArg implements ArgStrategy{
+    @Override
+    public boolean matchArg(String arg) {
+        String[] cmdArgs = arg.split(" ");
+        return cmdArgs[0].equals("list");
+    }
+
+    @Override
+    public void execCmd(String arg) {
+        RegistryFile registry = RegistryFile.getInstance();
+        registry.listAllDatabases();
+    }
+}