Source Code Cross Referenced for ArgumentParser.java in  » Database-Client » SQL-Workbench » workbench » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » SQL Workbench » workbench.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * ArgumentParser.java
003:         *
004:         * This file is part of SQL Workbench/J, http://www.sql-workbench.net
005:         *
006:         * Copyright 2002-2008, Thomas Kellerer
007:         * No part of this code maybe reused without the permission of the author
008:         *
009:         * To contact the author please send an email to: support@sql-workbench.net
010:         *
011:         */
012:        package workbench.util;
013:
014:        import java.util.ArrayList;
015:        import java.util.Collection;
016:        import java.util.Comparator;
017:        import java.util.Iterator;
018:        import java.util.List;
019:        import java.util.Map;
020:        import java.util.TreeMap;
021:        import java.util.TreeSet;
022:        import workbench.log.LogMgr;
023:
024:        /**
025:         *
026:         * @author  support@sql-workbench.net
027:         */
028:        public class ArgumentParser {
029:            private static final String ARG_PRESENT = "$WB$__ARG_PRESENT__$WB$";
030:            private Map<String, String> arguments;
031:            private Map<String, ArgumentType> argTypes;
032:            private List<String> unknownParameters = new ArrayList<String>();
033:            private Map<String, Collection<String>> allowedValues;
034:            private int argCount = 0;
035:            private boolean needSwitch = true;
036:
037:            public ArgumentParser() {
038:                Comparator<String> c = new CaseInsensitiveComparator();
039:                arguments = new TreeMap<String, String>(c);
040:                argTypes = new TreeMap<String, ArgumentType>(c);
041:                allowedValues = new TreeMap<String, Collection<String>>(c);
042:            }
043:
044:            public ArgumentParser(boolean parameterSwitchNeeded) {
045:                this ();
046:                this .needSwitch = parameterSwitchNeeded;
047:            }
048:
049:            public boolean needsSwitch() {
050:                return needSwitch;
051:            }
052:
053:            public Collection<String> getAllowedValues(String key) {
054:                return allowedValues.get(key);
055:            }
056:
057:            public void addArgument(String key, List<String> values) {
058:                addArgument(key, ArgumentType.ListArgument);
059:                if (values == null)
060:                    return;
061:                Collection<String> v = new TreeSet<String>(
062:                        new CaseInsensitiveComparator());
063:                v.addAll(values);
064:                allowedValues.put(key, v);
065:            }
066:
067:            public void addArgument(String key) {
068:                addArgument(key, ArgumentType.StringArgument);
069:            }
070:
071:            public void addArgument(String key, ArgumentType type) {
072:                if (key == null)
073:                    throw new NullPointerException("Key may not be null");
074:
075:                this .arguments.put(key, null);
076:                this .argTypes.put(key, type);
077:            }
078:
079:            public void parse(String args[]) {
080:                this .reset();
081:                StringBuilder line = new StringBuilder(200);
082:                for (int i = 0; i < args.length; i++) {
083:                    line.append(args[i]);
084:                    line.append(' ');
085:                }
086:                this .parse(line.toString());
087:            }
088:
089:            public void parse(String aCmdLine) {
090:                this .reset();
091:
092:                try {
093:                    WbStringTokenizer tok = new WbStringTokenizer('-', "\"'",
094:                            false);
095:                    tok.setDelimiterNeedsWhitspace(true);
096:                    tok.setSourceString(aCmdLine.trim());
097:
098:                    while (tok.hasMoreTokens()) {
099:                        String word = tok.nextToken();
100:                        if (word == null || word.length() == 0)
101:                            continue;
102:                        String arg = null;
103:                        String value = null;
104:                        int pos = word.indexOf('=');
105:                        if (pos > -1) {
106:                            arg = word.substring(0, pos).trim().toLowerCase();
107:                            value = word.substring(pos + 1).trim();
108:                        } else {
109:                            arg = word.trim().toLowerCase();
110:                        }
111:
112:                        if (value == null) {
113:                            value = ARG_PRESENT;
114:                        }
115:
116:                        if (arguments.containsKey(arg)) {
117:                            arguments.put(arg, value);
118:                            this .argCount++;
119:                        } else {
120:                            this .unknownParameters.add(arg);
121:                        }
122:                    }
123:                } catch (Exception e) {
124:                    LogMgr.logError("ArgumentParser.parse()",
125:                            "Error when parsing input line: " + aCmdLine, e);
126:                }
127:            }
128:
129:            public List<String> getArgumentsOnCommandLine() {
130:                ArrayList<String> result = new ArrayList<String>(this .arguments
131:                        .size());
132:                for (Map.Entry<String, String> entry : arguments.entrySet()) {
133:                    if (entry.getValue() != null) {
134:                        result.add(entry.getKey());
135:                    }
136:                }
137:                return result;
138:            }
139:
140:            /**
141:             * Returns the list of known arguments for this ArgumentParser
142:             * @return the registered argument types
143:             */
144:            public List<String> getRegisteredArguments() {
145:                Iterator<Map.Entry<String, ArgumentType>> itr = this .argTypes
146:                        .entrySet().iterator();
147:
148:                List<String> result = new ArrayList<String>(this .argTypes
149:                        .size());
150:                while (itr.hasNext()) {
151:                    Map.Entry<String, ArgumentType> entry = itr.next();
152:                    if (entry.getValue() != ArgumentType.Deprecated) {
153:                        result.add(entry.getKey());
154:                    }
155:                }
156:                return result;
157:            }
158:
159:            /**
160:             * Returns the type of an argument
161:             */
162:            public ArgumentType getArgumentType(String arg) {
163:                return this .argTypes.get(arg);
164:            }
165:
166:            public boolean hasArguments() {
167:                return this .argCount > 0;
168:            }
169:
170:            public int getArgumentCount() {
171:                return this .argCount;
172:            }
173:
174:            public boolean hasUnknownArguments() {
175:                return this .unknownParameters.size() > 0;
176:            }
177:
178:            /**
179:             * Return a list of unknown arguments. 
180:             * Each argument passed in the original command line
181:             * that has not been registered using addArgument()
182:             * will be listed in the result. For each argument 
183:             * in this list, isRegistered() would return false.
184:             * 
185:             * @return a comma separated string with unknown arguments
186:             */
187:            public String getUnknownArguments() {
188:                StringBuilder msg = new StringBuilder();
189:
190:                if (unknownParameters.size() > 0) {
191:                    for (int i = 0; i < unknownParameters.size(); i++) {
192:                        if (i > 0)
193:                            msg.append(' ');
194:                        msg.append('-');
195:                        msg.append(unknownParameters.get(i));
196:                    }
197:                }
198:                return msg.toString();
199:            }
200:
201:            /**
202:             * Check if the given argument is a valid argument for the current commandline
203:             * @return true if arg was registered with addArgument()
204:             */
205:            public boolean isRegistered(String arg) {
206:                return this .arguments.containsKey(arg);
207:            }
208:
209:            /**
210:             * Check if the given argument was passed on the commandline. 
211:             * This does not check if a value has been supplied with the 
212:             * argument. This can be used for argument-less parameters
213:             * e.g. -showEncodings
214:             * 
215:             * @return true if the given argument was part of the commandline
216:             */
217:            public boolean isArgPresent(String arg) {
218:                if (arg == null)
219:                    return false;
220:                // Even arguments without a value will have something 
221:                // in the map (the ARG_PRESENT marker object), otherwise
222:                // they could not be distinguished from arguments that
223:                // are merely registered.
224:                Object value = this .arguments.get(arg);
225:                return (value != null);
226:            }
227:
228:            private void reset() {
229:                Iterator<String> keys = this .arguments.keySet().iterator();
230:                while (keys.hasNext()) {
231:                    String key = keys.next();
232:                    this .arguments.put(key, null);
233:                }
234:                this .argCount = 0;
235:                this .unknownParameters.clear();
236:            }
237:
238:            /**
239:             * Return a parameter as a boolean.
240:             * @return the value as passed on the command line
241:             *         false if no value was specified
242:             * 
243:             * @see #getBoolean(String, boolean)
244:             */
245:            public boolean getBoolean(String key) {
246:                return getBoolean(key, false);
247:            }
248:
249:            /**
250:             * Return a parameter value as a boolean. 
251:             * If no value was specified the given default value will be returned
252:             * 
253:             * @param key the parameter key
254:             * @param defaultValue the default to be returned if the parameter is not present
255:             * 
256:             * @return the value as passed on the commandline 
257:             *         the defaultValue if the parameter was not supplied by the user
258:             * 
259:             * @see #getValue(String)
260:             * @see #getBoolean(String)
261:             * @see StringUtil#stringToBool(String)
262:             */
263:            public boolean getBoolean(String key, boolean defaultValue) {
264:                String value = this .getValue(key);
265:                if (value == null || value.trim().length() == 0)
266:                    return defaultValue;
267:                return StringUtil.stringToBool(value);
268:            }
269:
270:            /**
271:             * Return the parameter for the give argument. 
272:             * 
273:             * If no value was specified or the parameter was not 
274:             * passed on the commandline null will be returned.
275:             * Any leading or trailing quotes will be removed from the argument
276:             * before it is returned.
277:             * 
278:             * @param key the parameter to retrieve
279:             * @return the value as provided by the user or null if no value specified
280:             * 
281:             * @see StringUtil#trimQuotes(String)
282:             */
283:            public String getValue(String key) {
284:                String value = this .arguments.get(key);
285:                if (value == ARG_PRESENT)
286:                    return null;
287:                return value;
288:            }
289:
290:            public int getIntValue(String key, int def) {
291:                return StringUtil.getIntValue(this.getValue(key), def);
292:            }
293:
294:        }
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