/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved.
*
* This program and the accompanying materials are made available under
* the terms of the Common Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/cpl-v10.html
*
* $Id: OptsParser.java,v 1.1.1.1 2004/05/09 16:57:57 vlad_r Exp $
*/
package com.vladium.util.args;
import java.io.CharArrayWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.vladium.util.IConstants;
import com.vladium.util.ResourceLoader;
// ----------------------------------------------------------------------------
/**
* @author Vlad Roubtsov, (C) 2002
*/
final class OptsParser implements IOptsParser
{
// public: ................................................................
// TODO: #-comments
// TODO: prefixing for error messages
// TODO: support var subst (main class name, etc)
// TODO: support short/full usage
// TODO: support marking opts as for displayable in full usage only
public synchronized void usage (final PrintWriter out, final int level, final int width)
{
// TODO: use width
// TODO: cache?
final String prefix = OPT_PREFIXES [CANONICAL_OPT_PREFIX];
for (Iterator i = m_metadata.getOptDefs (); i.hasNext (); )
{
final OptDef optdef = (OptDef) i.next ();
if ((level < 2) && optdef.isDetailedOnly ()) // skip detailed usage only options
continue;
final StringBuffer line = new StringBuffer (" ");
final String canonicalName = optdef.getCanonicalName ();
final boolean isPattern = optdef.isPattern ();
line.append (prefix);
line.append (canonicalName);
if (isPattern) line.append ('*');
final String [] names = optdef.getNames ();
for (int n = 0; n < names.length; ++ n)
{
final String name = names [n];
if (! name.equals (canonicalName))
{
line.append (", ");
line.append (prefix);
line.append (name);
if (isPattern) line.append ('*');
}
}
final String vmnemonic = optdef.getValueMnemonic ();
if (vmnemonic != null)
{
line.append (' ');
line.append (vmnemonic);
}
int padding = 16 - line.length ();
if (padding < 2)
{
// end the current line
out.println (line);
line.setLength (0);
for (int p = 0; p < 16; ++ p) line.append (' ');
}
else
{
for (int p = 0; p < padding; ++ p) line.append (' ');
}
if (optdef.isRequired ()) line.append ("{required} ");
line.append (optdef.getDescription ());
out.println (line);
}
if (level < DETAILED_USAGE)
{
final OptDef usageOptDef = m_metadata.getUsageOptDef ();
if ((usageOptDef != null) && (usageOptDef.getNames () != null) && (usageOptDef.getNames ().length > 1))
{
out.println ();
out.println (" {use '" + usageOptDef.getNames () [1] + "' option to see detailed usage help}");
}
}
}
public synchronized IOpts parse (final String [] args)
{
if (args == null) throw new IllegalArgumentException ("null input: args");
final Opts opts = new Opts ();
{
final String [] nv = new String [2]; // out buffer for getOptNameAndValue()
final String [] pp = new String [1]; // out buffer for getOptDef()
// running state/current vars:
int state = STATE_OPT;
OptDef optdef = null;
Opt opt = null;
String value = null;
int valueCount = 0;
int a;
scan: for (a = 0; a < args.length; )
{
final String av = args [a];
if (av == null) throw new IllegalArgumentException ("null input: args[" + a + "]");
//System.out.println ("[state: " + state + "] av = " + av);
switch (state)
{
case STATE_OPT:
{
if (isOpt (av, valueCount, optdef))
{
// 'av' looks like an option: get its name and see if it
// is in the metadata
valueCount = 0;
getOptNameAndValue (av, nv); // this can leave nv[1] as null
// [assertion: nv [0] != null]
final String optName = nv [0]; // is not necessarily canonical
optdef = m_metadata.getOptDef (optName, pp); // pp [0] is always set by this
if (optdef == null)
{
// unknown option:
// TODO: coded messages?
opts.addError (formatMessage ("unknown option \'" + optName + "\'"));
state = STATE_ERROR;
}
else
{
// merge if necessary:
final String canonicalName = getOptCanonicalName (optName, optdef);
final String patternPrefix = pp [0];
opt = opts.getOpt (canonicalName);
if (optdef.isMergeable ())
{
if (opt == null)
{
opt = new Opt (optName, canonicalName, patternPrefix);
opts.addOpt (opt, optdef, optName);
}
}
else
{
if (opt == null)
{
opt = new Opt (optName, canonicalName, patternPrefix);
opts.addOpt (opt, optdef, optName);
}
else
{
opts.addError (formatMessage ("option \'" + optName + "\' cannot be specified more than once"));
state = STATE_ERROR;
}
}
value = nv [1];
if (value == null) ++ a;
state = STATE_OPT_VALUE;
}
}
else
{
// not in STATE_OPT_VALUE and 'av' does not look
// like an option: the rest of args are free
state = STATE_FREE_ARGS;
}
}
break;
case STATE_OPT_VALUE:
{
// [assertion: opt != null and optdef != null]
if (value != null)
{
// value specified explicitly using the <name>separator<value> syntax:
// [don't shift a]
valueCount = 1;
final int [] cardinality = optdef.getValueCardinality ();
if (cardinality [1] < 1)
{
opts.addError (formatMessage ("option \'" + opt.getName () + "\' does not accept values: \'" + value + "\'"));
state = STATE_ERROR;
}
else
{
++ a;
opt.addValue (value);
}
}
else
{
value = args [a];
final int [] cardinality = optdef.getValueCardinality ();
if (isOpt (value, valueCount, optdef))
{
if (valueCount < cardinality [0])
{
opts.addError (formatMessage ("option \'" + opt.getName () + "\' does not accept fewer than " + cardinality [0] + " value(s)"));
state = STATE_ERROR;
}
else
state = STATE_OPT;
}
else
{
if (valueCount < cardinality [1])
{
++ valueCount;
++ a;
opt.addValue (value);
}
else
{
// this check is redundant:
// if (valueCount < cardinality [0])
// {
// opts.addError (formatMessage ("option \'" + opt.getName () + "\' does not accept fewer than " + cardinality [0] + " value(s)"));
//
// state = STATE_ERROR;
// }
// else
state = STATE_FREE_ARGS;
}
}
}
value = null;
}
break;
case STATE_FREE_ARGS:
{
if (isOpt (args [a], valueCount, optdef))
{
state = STATE_OPT;
}
else
{
opts.setFreeArgs (args, a);
break scan;
}
}
break;
case STATE_ERROR:
{
break scan; // TODO: could use the current value of 'a' for a better error message
}
} // end of switch
}
if (a == args.length)
{
if (opt != null) // validate the last option's min cardinality
{
final int [] cardinality = optdef.getValueCardinality ();
if (valueCount < cardinality [0])
{
opts.addError (formatMessage ("option \'" + opt.getName () + "\' does not accept fewer than " + cardinality [0] + " value(s)"));
}
}
else
{
opts.setFreeArgs (args, a);
}
}
} // end of 'args' parsing
final IOpt [] specified = opts.getOpts ();
if (specified != null)
{
// validation: all required parameters must be specified
final Set /* String(canonical name) */ required = new HashSet ();
required.addAll (m_metadata.getRequiredOpts ());
for (int s = 0; s < specified.length; ++ s)
{
required.remove (specified [s].getCanonicalName ());
}
if (! required.isEmpty ())
{
for (Iterator i = required.iterator (); i.hasNext (); )
{
opts.addError (formatMessage ("missing required option \'" + (String) i.next () + "\'"));
}
}
for (int s = 0; s < specified.length; ++ s)
{
final IOpt opt = specified [s];
final OptDef optdef = m_metadata.getOptDef (opt.getCanonicalName (), null);
// // validation: value cardinality constraints
//
// final int [] cardinality = optdef.getValueCardinality ();
// if (opt.getValueCount () < cardinality [0])
// opts.addError (formatMessage ("option \'" + opt.getName () + "\' must have at least " + cardinality [0] + " value(s)"));
// else if (opt.getValueCount () > cardinality [1])
// opts.addError (formatMessage ("option \'" + opt.getName () + "\' must not have more than " + cardinality [1] + " value(s)"));
// validation: "requires" constraints
final String [] requires = optdef.getRequiresSet (); // not canonicalized
if (requires != null)
{
for (int r = 0; r < requires.length; ++ r)
{
if (opts.getOpt (requires [r]) == null)
opts.addError (formatMessage ("option \'" + opt.getName () + "\' requires option \'" + requires [r] + "\'"));
}
}
// validation: "not with" constraints
final String [] excludes = optdef.getExcludesSet (); // not canonicalized
if (excludes != null)
{
for (int x = 0; x < excludes.length; ++ x)
{
final Opt xopt = opts.getOpt (excludes [x]);
if (xopt != null)
opts.addError (formatMessage ("option \'" + opt.getName () + "\' cannot be used with option \'" + xopt.getName () + "\'"));
}
}
// side effect: determine if usage is requested
if (optdef.isUsage ())
{
opts.setUsageRequested (opt.getName ().equals (opt.getCanonicalName ()) ? SHORT_USAGE : DETAILED_USAGE);
}
}
}
return opts;
}
private static String getOptCanonicalName (final String n, final OptDef optdef)
{
if (optdef.isPattern ())
{
final String canonicalPattern = optdef.getCanonicalName ();
final String [] patterns = optdef.getNames ();
for (int p = 0; p < patterns.length; ++ p)
{
final String pattern = patterns [p];
if (n.startsWith (pattern))
{
return canonicalPattern.concat (n.substring (pattern.length ()));
}
}
// this should never happen:
throw new IllegalStateException ("failed to detect pattern prefix for [" + n + "]");
}
else
{
return optdef.getCanonicalName ();
}
}
/*
* ['optdef' can be null if no current opt def context has been established]
*
* pre: av != null
* input not validated
*/
private static boolean isOpt (final String av, final int valueCount, final OptDef optdef)
{
if (optdef != null)
{
// if the current optdef calls for more values, consume the next token
// as an op value greedily, without looking at its prefix:
final int [] cardinality = optdef.getValueCardinality ();
if (valueCount < cardinality [1]) return false;
}
// else check av's prefix:
for (int p = 0; p < OPT_PREFIXES.length; ++ p)
{
if (av.startsWith (OPT_PREFIXES [p]))
return (av.length () > OPT_PREFIXES [p].length ());
}
return false;
}
/*
* pre: av != null and isOpt(av)=true
* input not validated
*/
private static void getOptNameAndValue (final String av, final String [] nv)
{
nv [0] = null;
nv [1] = null;
for (int p = 0; p < OPT_PREFIXES.length; ++ p)
{
if ((av.startsWith (OPT_PREFIXES [p])) && (av.length () > OPT_PREFIXES [p].length ()))
{
final String name = av.substring (OPT_PREFIXES [p].length ()); // with a possible value after a separator
char separator = 0;
int sindex = Integer.MAX_VALUE;
for (int s = 0; s < OPT_VALUE_SEPARATORS.length; ++ s)
{
final int index = name.indexOf (OPT_VALUE_SEPARATORS [s]);
if ((index > 0) && (index < sindex))
{
separator = OPT_VALUE_SEPARATORS [s];
sindex = index;
}
}
if (separator != 0)
{
nv [0] = name.substring (0, sindex);
nv [1] = name.substring (sindex + 1);
}
else
{
nv [0] = name;
}
return;
}
}
}
// protected: .............................................................
// package: ...............................................................
static final class Opt implements IOptsParser.IOpt
{
public String getName ()
{
return m_name;
}
public String getCanonicalName ()
{
return m_canonicalName;
}
public int getValueCount ()
{
if (m_values == null) return 0;
return m_values.size ();
}
public String getFirstValue ()
{
if (m_values == null) return null;
return (String) m_values.get (0);
}
public String [] getValues ()
{
if (m_values == null) return IConstants.EMPTY_STRING_ARRAY;
final String [] result = new String [m_values.size ()];
m_values.toArray (result);
return result;
}
public String getPatternPrefix ()
{
return m_patternPrefix;
}
public String toString ()
{
final StringBuffer s = new StringBuffer (m_name);
if (! m_canonicalName.equals (m_name)) s.append (" [" + m_canonicalName + "]");
if (m_values != null)
{
s.append (": ");
s.append (m_values);
}
return s.toString ();
}
Opt (final String name, final String canonicalName, final String patternPrefix)
{
m_name = name;
m_canonicalName = canonicalName;
m_patternPrefix = patternPrefix;
}
void addValue (final String value)
{
if (value == null) throw new IllegalArgumentException ("null input: value");
if (m_values == null) m_values = new ArrayList ();
m_values.add (value);
}
private final String m_name, m_canonicalName, m_patternPrefix;
private ArrayList m_values;
} // end of nested class
static final class Opts implements IOptsParser.IOpts
{
public int usageRequestLevel ()
{
return m_usageRequestLevel;
}
public void error (final PrintWriter out, final int width)
{
// TODO: use width
if (hasErrors ())
{
for (Iterator i = m_errors.iterator (); i.hasNext (); )
{
out.println (i.next ());
}
}
}
public String [] getFreeArgs ()
{
if (hasErrors ())
throw new IllegalStateException (errorsToString ());
return m_freeArgs;
}
public IOpt [] getOpts ()
{
if (hasErrors ()) return null;
if (m_opts.isEmpty ())
return EMPTY_OPT_ARRAY;
else
{
final IOpt [] result = new IOpt [m_opts.size ()];
m_opts.toArray (result);
return result;
}
}
public IOpt [] getOpts (final String pattern)
{
if (hasErrors ()) return null;
final List /* Opt */ patternOpts = (List) m_patternMap.get (pattern);
if ((patternOpts == null) || patternOpts.isEmpty ())
return EMPTY_OPT_ARRAY;
else
{
final IOpt [] result = new IOpt [patternOpts.size ()];
patternOpts.toArray (result);
return result;
}
}
public boolean hasArg (final String name)
{
if (hasErrors ())
throw new IllegalStateException (errorsToString ());
return m_nameMap.containsKey (name);
}
Opts ()
{
m_opts = new ArrayList ();
m_nameMap = new HashMap ();
m_patternMap = new HashMap ();
}
void addOpt (final Opt opt, final OptDef optdef, final String occuranceName)
{
if (opt == null) throw new IllegalArgumentException ("null input: opt");
if (optdef == null) throw new IllegalArgumentException ("null input: optdef");
if (occuranceName == null) throw new IllegalArgumentException ("null input: occuranceName");
// [name collisions detected elsewhere]
m_opts.add (opt);
final String [] names = optdef.getNames ();
final boolean isPattern = (opt.getPatternPrefix () != null);
if (isPattern)
{
final String unprefixedName = occuranceName.substring (opt.getPatternPrefix ().length ());
for (int n = 0; n < names.length; ++ n)
{
m_nameMap.put (names [n].concat (unprefixedName), opt);
}
{
final String canonicalPattern = optdef.getCanonicalName ();
List patternList = (List) m_patternMap.get (canonicalPattern);
if (patternList == null)
{
patternList = new ArrayList ();
for (int n = 0; n < names.length; ++ n)
{
m_patternMap.put (names [n], patternList);
}
}
patternList.add (opt);
}
}
else
{
for (int n = 0; n < names.length; ++ n)
{
m_nameMap.put (names [n], opt);
}
}
}
Opt getOpt (final String occuranceName)
{
if (occuranceName == null) throw new IllegalArgumentException ("null input: occuranceName");
return (Opt) m_nameMap.get (occuranceName);
}
void setFreeArgs (final String [] args, final int start)
{
if (args == null) throw new IllegalArgumentException ("null input: args");
if ((start < 0) || (start > args.length)) throw new IllegalArgumentException ("invalid start index: " + start);
m_freeArgs = new String [args.length - start];
System.arraycopy (args, start, m_freeArgs, 0, m_freeArgs.length);
}
void setUsageRequested (final int level)
{
m_usageRequestLevel = level;
}
void addError (final String msg)
{
if (msg != null)
{
if (m_errors == null) m_errors = new ArrayList ();
m_errors.add (msg);
}
}
boolean hasErrors ()
{
return (m_errors != null) && ! m_errors.isEmpty ();
}
String errorsToString ()
{
if (! hasErrors ()) return "<no errors>";
final CharArrayWriter caw = new CharArrayWriter ();
final PrintWriter pw = new PrintWriter (caw);
error (pw, DEFAULT_ERROR_WIDTH);
pw.flush ();
return caw.toString ();
}
private final List /* Opt */ m_opts;
private final Map /* String(name/pattern-prefixed name)->Opt */ m_nameMap;
private final Map /* String(pattern prefix)->List<Opt> */ m_patternMap;
private String [] m_freeArgs;
private List /* String */ m_errors;
private int m_usageRequestLevel;
private static final int DEFAULT_ERROR_WIDTH = 80;
private static final IOpt [] EMPTY_OPT_ARRAY = new IOpt [0];
} // end of nested class
static final class OptDef // TODO: merge with Opt?
{
OptDef (final boolean usage)
{
m_usage = usage;
}
boolean isUsage ()
{
return m_usage;
}
String getCanonicalName ()
{
return m_names [0];
}
String [] getNames ()
{
return m_names;
}
boolean isRequired ()
{
return m_required;
}
String getValueMnemonic ()
{
return m_valueMnemonic;
}
boolean isMergeable ()
{
return m_mergeable;
}
boolean isDetailedOnly ()
{
return m_detailedOnly;
}
boolean isPattern ()
{
return m_pattern;
}
int [] getValueCardinality ()
{
return m_valueCardinality;
}
String [] getRequiresSet ()
{
return m_requiresSet;
}
String [] getExcludesSet ()
{
return m_excludesSet;
}
String getDescription ()
{
return m_description;
}
void setNames (final String [] names)
{
if (names == null) throw new IllegalArgumentException ("null input: names");
m_names = names;
}
void setRequired (final boolean required)
{
m_required = required;
}
void setValueMnemonic (final String mnemonic)
{
if (mnemonic == null) throw new IllegalArgumentException ("null input: mnemonic");
m_valueMnemonic = mnemonic;
}
void setMergeable (final boolean mergeable)
{
m_mergeable = mergeable;
}
void setDetailedOnly (final boolean detailedOnly)
{
m_detailedOnly = detailedOnly;
}
void setPattern (final boolean pattern)
{
m_pattern = pattern;
}
void setValueCardinality (final int [] cardinality)
{
if ((cardinality == null) || (cardinality.length != 2)) throw new IllegalArgumentException ("null or invalid input: cardinality");
m_valueCardinality = cardinality;
}
void setRequiresSet (final String [] names)
{
if (names == null) throw new IllegalArgumentException ("null input: names");
m_requiresSet = names.length > 0 ? names : null;
}
void setExcludesSet (final String [] names)
{
if (names == null) throw new IllegalArgumentException ("null input: names");
m_excludesSet = names.length > 0 ? names : null;
}
void setDescription (final String description)
{
if (description == null) throw new IllegalArgumentException ("null input: description");
m_description = description;
}
static final int [] C_ZERO = new int [] {0, 0};
static final int [] C_ONE = new int [] {1, 1};
static final int [] C_ZERO_OR_ONE = new int [] {0, 1};
static final int [] C_ZERO_OR_MORE = new int [] {0, Integer.MAX_VALUE};
static final int [] C_ONE_OR_MORE = new int [] {1, Integer.MAX_VALUE};
private final boolean m_usage;
private String [] m_names;
private boolean m_required;
private String m_valueMnemonic;
private boolean m_mergeable;
private boolean m_detailedOnly;
private boolean m_pattern;
private int [] m_valueCardinality;
private String [] m_requiresSet, m_excludesSet;
private String m_description;
} // end of nested class
static final class OptDefMetadata
{
OptDefMetadata ()
{
m_optdefs = new ArrayList ();
m_optdefMap = new HashMap ();
m_requiredOpts = new HashSet ();
m_patternOptDefMap = new HashMap ();
}
OptDef getOptDef (final String name, final String [] prefixout)
{
if (name == null) throw new IllegalArgumentException ("null input: name");
if (prefixout != null) prefixout [0] = null;
// first, see if this is a regular option:
OptDef result = (OptDef) m_optdefMap.get (name);
// next, see if this is a prefixed option:
if (result == null)
{
for (Iterator ps = m_patternOptDefMap.entrySet ().iterator ();
ps.hasNext (); )
{
final Map.Entry entry = (Map.Entry) ps.next ();
final String pattern = (String) entry.getKey ();
if (name.startsWith (pattern))
{
if (prefixout != null) prefixout [0] = pattern;
result = (OptDef) entry.getValue ();
break;
}
}
}
return result;
}
Iterator /* OptDef */ getOptDefs ()
{
return m_optdefs.iterator ();
}
OptDef getPatternOptDefs (final String pattern) // returns null if no such pattern is defined
{
if (pattern == null) throw new IllegalArgumentException ("null input: pattern");
return (OptDef) m_patternOptDefMap.get (pattern);
}
Set /* String(canonical name) */ getRequiredOpts ()
{
return m_requiredOpts;
}
OptDef getUsageOptDef ()
{
return m_usageOptDef;
}
void addOptDef (final OptDef optdef)
{
if (optdef == null) throw new IllegalArgumentException ("null input: optdef");
final Map map = optdef.isPattern () ? m_patternOptDefMap : m_optdefMap;
final String [] names = optdef.getNames ();
for (int n = 0; n < names.length; ++ n)
{
if (map.containsKey (names [n]))
throw new IllegalArgumentException ("duplicate option name [" + names [n] + "]");
map.put (names [n], optdef);
}
m_optdefs.add (optdef);
if (optdef.isRequired ())
m_requiredOpts.add (optdef.getCanonicalName ());
if (optdef.isUsage ())
{
if (m_usageOptDef != null)
throw new IllegalArgumentException ("usage optdef set already");
m_usageOptDef = optdef;
}
}
final List /* OptDef */ m_optdefs; // keeps the addition order
final Map /* String(name)->OptDef */ m_optdefMap;
final Set /* String(canonical name) */ m_requiredOpts;
final Map /* String(pattern name)->OptDef */ m_patternOptDefMap;
private OptDef m_usageOptDef;
} // end of nested class
static final class MetadataParser
{
/*
* metadata := ( optdef )* <EOF>
*
* optdef := optnamelist ":" optmetadata ";"
* optnamelist := namelist
* optmetadata :=
* ("optional" | "required" )
* [ "," "mergeable" ]
* [ "," "detailedonly" ]
* [ "," "pattern" ]
* "," "values" ":" cardinality
* [ "," name ]
* [ "," "requires" "{" namelist "}" ]
* [ "," "notwith" "{" namelist "}" ]
* "," text
* cardinality := "0" | "1" | "?"
* namelist := name ( "," name )*
* name := <single quoted string>
* text := <double quoted string>
*/
OptDef [] parse (final Reader in)
{
if (in == null) throw new IllegalArgumentException ("null input: in");
m_in = in;
nextChar ();
nextToken ();
while (m_token != Token.EOF)
{
if (m_opts == null) m_opts = new ArrayList ();
m_opts.add (optdef ());
}
final OptDef [] result;
if ((m_opts == null) || (m_opts.size () == 0))
result = EMPTY_OPTDEF_ARRAY;
else
{
result = new OptDef [m_opts.size ()];
m_opts.toArray (result);
}
m_in = null;
m_opts = null;
return result;
}
OptDef optdef ()
{
final OptDef optdef = new OptDef (false);
optdef.setNames (optnamelist ());
accept (Token.COLON_ID);
optmetadata (optdef);
accept (Token.SEMICOLON_ID);
return optdef;
}
String [] optnamelist ()
{
return namelist ();
}
void optmetadata (final OptDef optdef)
{
switch (m_token.getID ())
{
case Token.REQUIRED_ID:
{
accept ();
optdef.setRequired (true);
}
break;
case Token.OPTIONAL_ID:
{
accept ();
optdef.setRequired (false);
}
break;
default:
throw new IllegalArgumentException ("parse error: invalid token " + m_token + ", expected " + Token.REQUIRED + " or " + Token.OPTIONAL);
} // end of switch
accept (Token.COMMA_ID);
if (m_token.getID () == Token.MERGEABLE_ID)
{
accept ();
optdef.setMergeable (true);
accept (Token.COMMA_ID);
}
if (m_token.getID () == Token.DETAILEDONLY_ID)
{
accept ();
optdef.setDetailedOnly (true);
accept (Token.COMMA_ID);
}
if (m_token.getID () == Token.PATTERN_ID)
{
accept ();
optdef.setPattern (true);
accept (Token.COMMA_ID);
}
accept (Token.VALUES_ID);
accept (Token.COLON_ID);
optdef.setValueCardinality (cardinality ());
accept (Token.COMMA_ID);
if (m_token.getID () == Token.STRING_ID)
{
optdef.setValueMnemonic (m_token.getValue ());
accept ();
accept (Token.COMMA_ID);
}
if (m_token.getID () == Token.REQUIRES_ID)
{
accept ();
accept (Token.LBRACKET_ID);
optdef.setRequiresSet (namelist ());
accept (Token.RBRACKET_ID);
accept (Token.COMMA_ID);
}
if (m_token.getID () == Token.EXCLUDES_ID)
{
accept ();
accept (Token.LBRACKET_ID);
optdef.setExcludesSet (namelist ());
accept (Token.RBRACKET_ID);
accept (Token.COMMA_ID);
}
optdef.setDescription (accept (Token.TEXT_ID).getValue ());
}
int [] cardinality ()
{
final Token result = accept (Token.CARD_ID);
if ("0".equals (result.getValue ()))
return OptDef.C_ZERO;
else if ("1".equals (result.getValue ()))
return OptDef.C_ONE;
else // ?
return OptDef.C_ZERO_OR_ONE;
}
String [] namelist ()
{
final List _result = new ArrayList ();
_result.add (accept (Token.STRING_ID).getValue ());
while (m_token.getID () == Token.COMMA_ID)
{
accept ();
_result.add (accept (Token.STRING_ID).getValue ());
}
final String [] result = new String [_result.size ()];
_result.toArray (result);
return result;
}
Token accept ()
{
final Token current = m_token;
nextToken ();
return current;
}
Token accept (final int tokenID)
{
final Token current = m_token;
if (m_token.getID () == tokenID)
nextToken ();
else
throw new IllegalArgumentException ("parse error: invalid token [" + m_token + "], expected type [" + tokenID + "]");
return current;
}
// "scanner":
void nextToken ()
{
consumeWS ();
switch (m_currentChar)
{
case -1: m_token = Token.EOF; break;
case ':':
{
nextChar ();
m_token = Token.COLON;
}
break;
case ';':
{
nextChar ();
m_token = Token.SEMICOLON;
}
break;
case ',':
{
nextChar ();
m_token = Token.COMMA;
}
break;
case '{':
{
nextChar ();
m_token = Token.LBRACKET;
}
break;
case '}':
{
nextChar ();
m_token = Token.RBRACKET;
}
break;
case '0':
{
nextChar ();
m_token = new Token (Token.CARD_ID, "0");
}
break;
case '1':
{
nextChar ();
m_token = new Token (Token.CARD_ID, "1");
}
break;
case '?':
{
nextChar ();
m_token = new Token (Token.CARD_ID, "?");
}
break;
case '\'':
{
final StringBuffer value = new StringBuffer ();
nextChar ();
while (m_currentChar != '\'')
{
value.append ((char) m_currentChar);
nextChar ();
}
nextChar ();
m_token = new Token (Token.STRING_ID, value.toString ());
}
break;
case '\"':
{
final StringBuffer value = new StringBuffer ();
nextChar ();
while (m_currentChar != '\"')
{
value.append ((char) m_currentChar);
nextChar ();
}
nextChar ();
m_token = new Token (Token.TEXT_ID, value.toString ());
}
break;
default:
{
final StringBuffer value = new StringBuffer ();
while (Character.isLetter ((char) m_currentChar))
{
value.append ((char) m_currentChar);
nextChar ();
}
final Token token = (Token) KEYWORDS.get (value.toString ());
if (token == null)
throw new IllegalArgumentException ("parse error: unrecognized keyword [" + value + "]");
m_token = token;
}
} // end of switch
}
private void consumeWS ()
{
if (m_currentChar == -1)
return;
else
{
while (Character.isWhitespace ((char) m_currentChar))
{
nextChar ();
}
}
// TODO: #-comments
}
private void nextChar ()
{
try
{
m_currentChar = m_in.read ();
}
catch (IOException ioe)
{
throw new RuntimeException ("I/O error while parsing: " + ioe);
}
}
private Reader m_in;
private List m_opts;
private Token m_token;
private int m_currentChar;
private static final Map KEYWORDS;
private static final OptDef [] EMPTY_OPTDEF_ARRAY = new OptDef [0];
static
{
KEYWORDS = new HashMap (17);
KEYWORDS.put (Token.OPTIONAL.getValue (), Token.OPTIONAL);
KEYWORDS.put (Token.REQUIRED.getValue (), Token.REQUIRED);
KEYWORDS.put (Token.VALUES.getValue (), Token.VALUES);
KEYWORDS.put (Token.REQUIRES.getValue (), Token.REQUIRES);
KEYWORDS.put (Token.EXCLUDES.getValue (), Token.EXCLUDES);
KEYWORDS.put (Token.MERGEABLE.getValue (), Token.MERGEABLE);
KEYWORDS.put (Token.DETAILEDONLY.getValue (), Token.DETAILEDONLY);
KEYWORDS.put (Token.PATTERN.getValue (), Token.PATTERN);
}
} // end of nested class
OptsParser (final String metadataResourceName, final ClassLoader loader, final String [] usageOpts)
{
this (metadataResourceName, loader, null, usageOpts);
}
OptsParser (final String metadataResourceName, final ClassLoader loader, final String msgPrefix, final String [] usageOpts)
{
if (metadataResourceName == null) throw new IllegalArgumentException ("null input: metadataResourceName");
m_msgPrefix = msgPrefix;
InputStream in = null;
try
{
in = ResourceLoader.getResourceAsStream (metadataResourceName, loader);
if (in == null)
throw new IllegalArgumentException ("resource [" + metadataResourceName + "] could not be loaded via [" + loader + "]");
// TODO: encoding
final Reader rin = new InputStreamReader (in);
m_metadata = parseOptDefMetadata (rin, usageOpts);
}
finally
{
if (in != null) try { in.close (); } catch (IOException ignore) {}
}
}
// private: ...............................................................
private static final class Token
{
Token (final int ID, final String value)
{
if (value == null) throw new IllegalArgumentException ("null input: value");
m_ID = ID;
m_value = value;
}
int getID ()
{
return m_ID;
}
String getValue ()
{
return m_value;
}
public String toString ()
{
return m_ID + ": [" + m_value + "]";
}
static final int EOF_ID = 0;
static final int STRING_ID = 1;
static final int COLON_ID = 2;
static final int SEMICOLON_ID = 3;
static final int COMMA_ID = 4;
static final int LBRACKET_ID = 5;
static final int RBRACKET_ID = 6;
static final int OPTIONAL_ID = 7;
static final int REQUIRED_ID = 8;
static final int CARD_ID = 9;
static final int VALUES_ID = 10;
static final int TEXT_ID = 11;
static final int REQUIRES_ID = 12;
static final int EXCLUDES_ID = 13;
static final int MERGEABLE_ID = 14;
static final int DETAILEDONLY_ID = 15;
static final int PATTERN_ID = 16;
static final Token EOF = new Token (EOF_ID, "<EOF>");
static final Token COLON = new Token (COLON_ID, ":");
static final Token SEMICOLON = new Token (SEMICOLON_ID, ";");
static final Token COMMA = new Token (COMMA_ID, ",");
static final Token LBRACKET = new Token (LBRACKET_ID, "{");
static final Token RBRACKET = new Token (RBRACKET_ID, "}");
static final Token OPTIONAL = new Token (OPTIONAL_ID, "optional");
static final Token REQUIRED = new Token (REQUIRED_ID, "required");
static final Token VALUES = new Token (VALUES_ID, "values");
static final Token REQUIRES = new Token (REQUIRES_ID, "requires");
static final Token EXCLUDES = new Token (EXCLUDES_ID, "excludes");
static final Token MERGEABLE = new Token (MERGEABLE_ID, "mergeable");
static final Token DETAILEDONLY = new Token (DETAILEDONLY_ID, "detailedonly");
static final Token PATTERN = new Token (PATTERN_ID, "pattern");
private final int m_ID;
private final String m_value;
} // end of nested class
private static OptDefMetadata parseOptDefMetadata (final Reader in, final String [] usageOpts)
{
final MetadataParser parser = new MetadataParser ();
final OptDef [] optdefs = parser.parse (in);
// validate:
// for (int o = 0; o < optdefs.length; ++ o)
// {
// final OptDef optdef = optdefs [o];
// final int [] cardinality = optdef.getValueCardinality ();
//
// if (optdef.isMergeable ())
// {
// if ((cardinality [1] != 0) && (cardinality [1] != Integer.MAX_VALUE))
// throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] is mergeable and can only specify {0, +inf} for max value cardinality: " + cardinality [1]);
// }
// }
final OptDefMetadata result = new OptDefMetadata ();
for (int o = 0; o < optdefs.length; ++ o)
{
result.addOptDef (optdefs [o]);
}
// add usage opts:
if (usageOpts != null)
{
final OptDef usage = new OptDef (true);
usage.setNames (usageOpts);
usage.setDescription ("display usage information");
usage.setValueCardinality (OptDef.C_ZERO);
usage.setRequired (false);
usage.setDetailedOnly (false);
usage.setMergeable (false);
result.addOptDef (usage);
}
// TODO: fix this to be pattern-savvy
for (int o = 0; o < optdefs.length; ++ o)
{
final OptDef optdef = optdefs [o];
final String [] requires = optdef.getRequiresSet ();
if (requires != null)
{
for (int r = 0; r < requires.length; ++ r)
{
final OptDef ropt = result.getOptDef (requires [r], null);
if (ropt == null)
throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] specifies an unknown option [" + requires [r] + "] in its \'requires\' set");
if (ropt == optdef)
throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] specifies itself in its \'requires\' set");
}
}
final String [] excludes = optdef.getExcludesSet ();
if (excludes != null)
{
for (int x = 0; x < excludes.length; ++ x)
{
final OptDef xopt = result.getOptDef (excludes [x], null);
if (xopt == null)
throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] specifies an unknown option [" + excludes [x] + "] in its \'excludes\' set");
if (xopt.isRequired ())
throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] specifies a required option [" + excludes [x] + "] in its \'excludes\' set");
if (xopt == optdef)
throw new IllegalArgumentException ("option [" + optdef.getCanonicalName () + "] specifies itself in its \'excludes\' set");
}
}
}
return result;
}
private String formatMessage (final String msg)
{
if (m_msgPrefix == null) return msg;
else
{
return m_msgPrefix.concat (msg);
}
}
private final String m_msgPrefix;
private final OptDefMetadata m_metadata;
private static final int CANONICAL_OPT_PREFIX = 1; // indexes into OPT_PREFIXES
private static final String [] OPT_PREFIXES = new String [] {"--", "-"}; // HACK: these must appear in decreasing length order
private static final char [] OPT_VALUE_SEPARATORS = new char [] {':', '='};
private static final int STATE_OPT = 0, STATE_OPT_VALUE = 1, STATE_FREE_ARGS = 2, STATE_ERROR = 3;
} // end of class
// ---------------------------------------------------------------------------- |
