franta-hg@1: package info.globalcode.sql.dk;
franta-hg@1: 
franta-hg@4: import java.sql.Types;
franta-hg@4: import java.util.ArrayList;
franta-hg@4: import java.util.Collections;
franta-hg@4: import java.util.HashMap;
franta-hg@4: import java.util.List;
franta-hg@4: import java.util.Map;
franta-hg@4: 
franta-hg@1: /**
franta-hg@1:  *
franta-hg@1:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@1:  */
franta-hg@5: public class CLIParser {
franta-hg@1: 
franta-hg@4: 	public static final String TYPE_NAME_SEPARATOR = ":";
franta-hg@5: 	private final Map<String, Integer> types;
franta-hg@4: 
franta-hg@5: 	public CLIParser() {
franta-hg@4: 		Map<String, Integer> m = new HashMap<>();
franta-hg@4: 		m.put("int", Types.INTEGER);
franta-hg@4: 		m.put("string", Types.VARCHAR);
franta-hg@4: 		m.put("boolean", Types.BOOLEAN);
franta-hg@4: 		/**
franta-hg@4: 		 * TODO: more types
franta-hg@4: 		 */
franta-hg@4: 		types = Collections.unmodifiableMap(m);
franta-hg@4: 	}
franta-hg@4: 
franta-hg@5: 	public CLIOptions parseOptions(String[] args) {
franta-hg@1: 		CLIOptions options = new CLIOptions();
franta-hg@1: 
franta-hg@4: 		List<Integer> numberedTypes = new ArrayList<>();
franta-hg@4: 		Map<String, Integer> namedTypes = new HashMap<>();
franta-hg@2: 
franta-hg@1: 		for (int i = 0; i < args.length; i++) {
franta-hg@1: 			String arg = args[i];
franta-hg@2: 			switch (arg) {
franta-hg@2: 				case Tokens.TYPES:
franta-hg@8: 					String typesString = fetchNext(args, ++i);
franta-hg@4: 
franta-hg@4: 					for (String oneType : typesString.split("\\s*,\\s*")) {
franta-hg@4: 						int sepatratorIndex = oneType.indexOf(TYPE_NAME_SEPARATOR);
franta-hg@4: 						if (sepatratorIndex == -1) {
franta-hg@4: 							numberedTypes.add(getType(oneType));
franta-hg@4: 						} else {
franta-hg@4: 							String namePart = oneType.substring(0, sepatratorIndex);
franta-hg@4: 							String typePart = oneType.substring(sepatratorIndex + TYPE_NAME_SEPARATOR.length(), oneType.length());
franta-hg@4: 							namedTypes.put(namePart, getType(typePart));
franta-hg@4: 						}
franta-hg@4: 					}
franta-hg@2: 					break;
franta-hg@2: 				case Tokens.NAME_PREFIX:
franta-hg@8: 					options.setNamePrefix(fetchNext(args, ++i));
franta-hg@2: 					break;
franta-hg@1: 				case Tokens.DB:
franta-hg@8: 					options.setDatabaseName(fetchNext(args, ++i));
franta-hg@1: 					break;
franta-hg@1: 				case Tokens.SQL:
franta-hg@8: 					options.setSql(fetchNext(args, ++i));
franta-hg@2: 					options.setCommandType(CLIOptions.COMMAND_TYPE.QUERY);
franta-hg@1: 					break;
franta-hg@1: 				case Tokens.SQL_UPDATE:
franta-hg@2: 				case Tokens.SQL_INSERT:
franta-hg@8: 					options.setSql(fetchNext(args, ++i));
franta-hg@2: 					options.setCommandType(CLIOptions.COMMAND_TYPE.UPDATE);
franta-hg@1: 					break;
franta-hg@1: 				case Tokens.BATCH:
franta-hg@2: 					options.setBatch(true);
franta-hg@1: 					break;
franta-hg@4: 				case Tokens.DATA: // --data is the last option
franta-hg@4: 					for (i++; i < args.length; i++) {
franta-hg@4: 						arg = args[i];
franta-hg@4: 
franta-hg@8: 						if (arg.startsWith(options.getNamePrefix())) { // Named parameters:
franta-hg@4: 							String paramName = arg.substring(options.getNamePrefix().length());
franta-hg@8: 							String paramValue = fetchNext(args, ++i);
franta-hg@4: 							options.addNamedParameter(new NamedParameter(paramName, paramValue, namedTypes.get(paramName)));
franta-hg@8: 						} else { // Numbered parameters:
franta-hg@8: 							Parameter parameter;
franta-hg@8: 							if (numberedTypes.isEmpty()) {
franta-hg@8: 								parameter = new Parameter(arg, null);
franta-hg@8: 							} else {
franta-hg@8: 								int paramIndex = options.getNumberedParameters().size();
franta-hg@8: 								int paramType;
franta-hg@8: 								try {
franta-hg@8: 									paramType = numberedTypes.get(paramIndex);
franta-hg@8: 								} catch (IndexOutOfBoundsException e) {
franta-hg@8: 									throw new IllegalArgumentException("Missing type for parameter #" + paramIndex, e);
franta-hg@8: 								} catch (NullPointerException e) {
franta-hg@8: 									throw new IllegalArgumentException("Invalid type definition for parameter #" + paramIndex, e);
franta-hg@8: 								}
franta-hg@8: 								parameter = new Parameter(arg, paramType);
franta-hg@4: 							}
franta-hg@8: 							options.addNumberedParameter(parameter);
franta-hg@4: 						}
franta-hg@4: 					}
franta-hg@1: 					break;
franta-hg@4: 				default:
franta-hg@4: 					throw new IllegalArgumentException("Unknown option: " + arg);
franta-hg@1: 			}
franta-hg@1: 		}
franta-hg@8: 		return options;
franta-hg@8: 	}
franta-hg@1: 
franta-hg@8: 	private String fetchNext(String[] args, int index) {
franta-hg@8: 		if (index < args.length) {
franta-hg@8: 			return args[index];
franta-hg@8: 		} else {
franta-hg@8: 			throw new IllegalArgumentException("Expecting value for option: " + args[index - 1]);
franta-hg@8: 		}
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	public static class Tokens {
franta-hg@1: 
franta-hg@1: 		public static final String DB = "--db";
franta-hg@1: 		public static final String SQL = "--sql";
franta-hg@1: 		public static final String SQL_UPDATE = "--sql-update";
franta-hg@2: 		public static final String SQL_INSERT = "--sql-insert";
franta-hg@1: 		public static final String BATCH = "--batch";
franta-hg@1: 		public static final String DATA = "--data";
franta-hg@2: 		public static final String NAME_PREFIX = "--name-prefix";
franta-hg@1: 		public static final String TYPES = "--types";
franta-hg@1: 
franta-hg@1: 		private Tokens() {
franta-hg@1: 		}
franta-hg@1: 	}
franta-hg@4: 
franta-hg@8: 	private int getType(String typeString) {
franta-hg@8: 		Integer type = types.get(typeString);
franta-hg@8: 		if (type == null) {
franta-hg@8: 			throw new IllegalArgumentException("Unsupported type: " + typeString);
franta-hg@8: 		} else {
franta-hg@8: 			return type;
franta-hg@8: 		}
franta-hg@4: 	}
franta-hg@1: }