diff options
Diffstat (limited to 'libjava/classpath/gnu/xml/pipeline/PipelineFactory.java')
| -rw-r--r-- | libjava/classpath/gnu/xml/pipeline/PipelineFactory.java | 1036 |
1 files changed, 518 insertions, 518 deletions
diff --git a/libjava/classpath/gnu/xml/pipeline/PipelineFactory.java b/libjava/classpath/gnu/xml/pipeline/PipelineFactory.java index f88ab164311..c2adab0210e 100644 --- a/libjava/classpath/gnu/xml/pipeline/PipelineFactory.java +++ b/libjava/classpath/gnu/xml/pipeline/PipelineFactory.java @@ -1,4 +1,4 @@ -/* PipelineFactory.java -- +/* PipelineFactory.java -- Copyright (C) 1999,2000,2001 Free Software Foundation, Inc. This file is part of GNU Classpath. @@ -69,120 +69,120 @@ import org.xml.sax.ext.*; * The stage identifiers are either class names, or are one of the following * short identifiers built into this class. (Most of these identifiers are * no more than aliases for classes.) The built-in identifiers include:</p> - + <table border="1" cellpadding="3" cellspacing="0"> <tr bgcolor="#ccccff" class="TableHeadingColor"> - <th align="center" width="5%">Stage</th> - <th align="center" width="9%">Parameter</th> - <th align="center" width="1%">Terminus</th> - <th align="center">Description</th> + <th align="center" width="5%">Stage</th> + <th align="center" width="9%">Parameter</th> + <th align="center" width="1%">Terminus</th> + <th align="center">Description</th> </tr> <tr valign="top" align="center"> - <td><a href="../dom/Consumer.html">dom</a></td> - <td><em>none</em></td> - <td> yes </td> - <td align="left"> Applications code can access a DOM Document built - from the input event stream. When used as a filter, this buffers - data up to an <em>endDocument</em> call, and then uses a DOM parser - to report everything that has been recorded (which can easily be - less than what was reported to it). </td> + <td><a href="../dom/Consumer.html">dom</a></td> + <td><em>none</em></td> + <td> yes </td> + <td align="left"> Applications code can access a DOM Document built + from the input event stream. When used as a filter, this buffers + data up to an <em>endDocument</em> call, and then uses a DOM parser + to report everything that has been recorded (which can easily be + less than what was reported to it). </td> </tr> <tr valign="top" align="center"> - <td><a href="NSFilter.html">nsfix</a></td> - <td><em>none</em></td> - <td>no</td> - <td align="left">This stage ensures that the XML element and attribute - names in its output use namespace prefixes and declarations correctly. - That is, so that they match the "Namespace plus LocalName" naming data - with which each XML element and attribute is already associated. </td> + <td><a href="NSFilter.html">nsfix</a></td> + <td><em>none</em></td> + <td>no</td> + <td align="left">This stage ensures that the XML element and attribute + names in its output use namespace prefixes and declarations correctly. + That is, so that they match the "Namespace plus LocalName" naming data + with which each XML element and attribute is already associated. </td> </tr> <tr valign="top" align="center"> - <td><a href="EventFilter.html">null</a></td> - <td><em>none</em></td> - <td>yes</td> - <td align="left">This stage ignores all input event data.</td> + <td><a href="EventFilter.html">null</a></td> + <td><em>none</em></td> + <td>yes</td> + <td align="left">This stage ignores all input event data.</td> </tr> <tr valign="top" align="center"> - <td><a href="CallFilter.html">server</a></td> - <td><em>required</em><br> server URL </td> - <td>no</td> - <td align="left">Sends its input as XML request to a remote server, - normally a web application server using the HTTP or HTTPS protocols. - The output of this stage is the parsed response from that server.</td> + <td><a href="CallFilter.html">server</a></td> + <td><em>required</em><br> server URL </td> + <td>no</td> + <td align="left">Sends its input as XML request to a remote server, + normally a web application server using the HTTP or HTTPS protocols. + The output of this stage is the parsed response from that server.</td> </tr> <tr valign="top" align="center"> - <td><a href="TeeConsumer.html">tee</a></td> - <td><em>required</em><br> first pipeline</td> - <td>no</td> - <td align="left">This sends its events down two paths; its parameter - is a pipeline descriptor for the first path, and the second path - is the output of this stage.</td> + <td><a href="TeeConsumer.html">tee</a></td> + <td><em>required</em><br> first pipeline</td> + <td>no</td> + <td align="left">This sends its events down two paths; its parameter + is a pipeline descriptor for the first path, and the second path + is the output of this stage.</td> </tr> <tr valign="top" align="center"> - <td><a href="ValidationConsumer.html">validate</a></td> - <td><em>none</em></td> - <td>yes</td> - <td align="left">This checks for validity errors, and reports them - through its error handler. The input must include declaration events - and some lexical events. </td> + <td><a href="ValidationConsumer.html">validate</a></td> + <td><em>none</em></td> + <td>yes</td> + <td align="left">This checks for validity errors, and reports them + through its error handler. The input must include declaration events + and some lexical events. </td> </tr> <tr valign="top" align="center"> - <td><a href="WellFormednessFilter.html">wf</a></td> - <td><em>none</em></td> - <td>yes</td> - <td align="left"> This class provides some basic "well formedness" - tests on the input event stream, and reports a fatal error if any - of them fail. One example: start/end calls for elements must match. - No SAX parser is permitted to produce malformed output, but other - components can easily do so.</td> + <td><a href="WellFormednessFilter.html">wf</a></td> + <td><em>none</em></td> + <td>yes</td> + <td align="left"> This class provides some basic "well formedness" + tests on the input event stream, and reports a fatal error if any + of them fail. One example: start/end calls for elements must match. + No SAX parser is permitted to produce malformed output, but other + components can easily do so.</td> </tr> <tr valign="top" align="center"> - <td>write</td> - <td><em>required</em><br> "stdout", "stderr", or filename</td> - <td>yes</td> - <td align="left"> Writes its input to the specified output, as pretty - printed XML text encoded using UTF-8. Input events must be well - formed and "namespace fixed", else the output won't be XML (or possibly - namespace) conformant. The symbolic names represent - <em>System.out</em> and <em>System.err</em> respectively; names must - correspond to files which don't yet exist.</td> + <td>write</td> + <td><em>required</em><br> "stdout", "stderr", or filename</td> + <td>yes</td> + <td align="left"> Writes its input to the specified output, as pretty + printed XML text encoded using UTF-8. Input events must be well + formed and "namespace fixed", else the output won't be XML (or possibly + namespace) conformant. The symbolic names represent + <em>System.out</em> and <em>System.err</em> respectively; names must + correspond to files which don't yet exist.</td> </tr> <tr valign="top" align="center"> - <td>xhtml</td> - <td><em>required</em><br> "stdout", "stderr", or filename</td> - <td>yes</td> - <td align="left"> Like <em>write</em> (above), except that XHTML rules - are followed. The XHTML 1.0 Transitional document type is declared, - and only ASCII characters are written (for interoperability). Other - characters are written as entity or character references; the text is - pretty printed.</td> + <td>xhtml</td> + <td><em>required</em><br> "stdout", "stderr", or filename</td> + <td>yes</td> + <td align="left"> Like <em>write</em> (above), except that XHTML rules + are followed. The XHTML 1.0 Transitional document type is declared, + and only ASCII characters are written (for interoperability). Other + characters are written as entity or character references; the text is + pretty printed.</td> </tr> <tr valign="top" align="center"> - <td><a href="XIncludeFilter.html">xinclude</a></td> - <td><em>none</em></td> - <td>no</td> - <td align="left">This stage handles XInclude processing. - This is like entity inclusion, except that the included content - is declared in-line rather than in the DTD at the beginning of - a document. - </td> + <td><a href="XIncludeFilter.html">xinclude</a></td> + <td><em>none</em></td> + <td>no</td> + <td align="left">This stage handles XInclude processing. + This is like entity inclusion, except that the included content + is declared in-line rather than in the DTD at the beginning of + a document. + </td> </tr> <tr valign="top" align="center"> - <td><a href="XsltFilter.html">xslt</a></td> - <td><em>required</em><br> XSLT stylesheet URI</td> - <td>no</td> - <td align="left">This stage handles XSLT transformation - according to a stylesheet. - The implementation of the transformation may not actually - stream data, although if such an XSLT engine is in use - then that can happen. - </td> + <td><a href="XsltFilter.html">xslt</a></td> + <td><em>required</em><br> XSLT stylesheet URI</td> + <td>no</td> + <td align="left">This stage handles XSLT transformation + according to a stylesheet. + The implementation of the transformation may not actually + stream data, although if such an XSLT engine is in use + then that can happen. + </td> </tr> </table> - + * <p> Note that {@link EventFilter#bind} can automatically eliminate * some filters by setting SAX2 parser features appropriately. This means * that you can routinely put filters like "nsfix", "validate", or "wf" at the @@ -200,7 +200,7 @@ public class PipelineFactory public static EventConsumer createPipeline (String description) throws IOException { - return createPipeline (description, null); + return createPipeline (description, null); } /** @@ -211,25 +211,25 @@ public class PipelineFactory * segments with easily configured ones. */ public static EventConsumer createPipeline ( - String description, - EventConsumer next + String description, + EventConsumer next ) throws IOException { - // tokens are (for now) what's separated by whitespace; - // very easy to parse, but IDs never have spaces. + // tokens are (for now) what's separated by whitespace; + // very easy to parse, but IDs never have spaces. - StringTokenizer tokenizer; - String tokens []; + StringTokenizer tokenizer; + String tokens []; - tokenizer = new StringTokenizer (description); - tokens = new String [tokenizer.countTokens ()]; - for (int i = 0; i < tokens.length; i++) - tokens [i] = tokenizer.nextToken (); + tokenizer = new StringTokenizer (description); + tokens = new String [tokenizer.countTokens ()]; + for (int i = 0; i < tokens.length; i++) + tokens [i] = tokenizer.nextToken (); - PipelineFactory factory = new PipelineFactory (); - Pipeline pipeline = factory.parsePipeline (tokens, next); + PipelineFactory factory = new PipelineFactory (); + Pipeline pipeline = factory.parsePipeline (tokens, next); - return pipeline.createPipeline (); + return pipeline.createPipeline (); } @@ -242,70 +242,70 @@ public class PipelineFactory * predefined aliases) left and right parenthesis, and the vertical bar. */ public static EventConsumer createPipeline ( - String tokens [], - EventConsumer next + String tokens [], + EventConsumer next ) throws IOException { - PipelineFactory factory = new PipelineFactory (); - Pipeline pipeline = factory.parsePipeline (tokens, next); + PipelineFactory factory = new PipelineFactory (); + Pipeline pipeline = factory.parsePipeline (tokens, next); - return pipeline.createPipeline (); + return pipeline.createPipeline (); } - private String tokens []; - private int index; + private String tokens []; + private int index; private Pipeline parsePipeline (String toks [], EventConsumer next) { - tokens = toks; - index = 0; - - Pipeline retval = parsePipeline (next); - - if (index != toks.length) - throw new ArrayIndexOutOfBoundsException ( - "extra token: " + tokens [index]); - return retval; + tokens = toks; + index = 0; + + Pipeline retval = parsePipeline (next); + + if (index != toks.length) + throw new ArrayIndexOutOfBoundsException ( + "extra token: " + tokens [index]); + return retval; } // pipeline ::= stage | stage '|' pipeline private Pipeline parsePipeline (EventConsumer next) { - Pipeline retval = new Pipeline (parseStage ()); - - // minimal pipelines: "stage" and "... | id" - if (index > (tokens.length - 2) - || !"|".equals (tokens [index]) - ) { - retval.next = next; - return retval; - } - index++; - retval.rest = parsePipeline (next); - return retval; + Pipeline retval = new Pipeline (parseStage ()); + + // minimal pipelines: "stage" and "... | id" + if (index > (tokens.length - 2) + || !"|".equals (tokens [index]) + ) { + retval.next = next; + return retval; + } + index++; + retval.rest = parsePipeline (next); + return retval; } // stage ::= id | id '(' pipeline ')' private Stage parseStage () { - Stage retval = new Stage (tokens [index++]); - - // minimal stages: "id" and "id ( id )" - if (index > (tokens.length - 2) - || !"(".equals (tokens [index]) /*)*/ - ) - return retval; - - index++; - retval.param = parsePipeline (null); - if (index >= tokens.length) - throw new ArrayIndexOutOfBoundsException ( - "missing right paren"); - if (/*(*/ !")".equals (tokens [index++])) - throw new ArrayIndexOutOfBoundsException ( - "required right paren, not: " + tokens [index - 1]); - return retval; + Stage retval = new Stage (tokens [index++]); + + // minimal stages: "id" and "id ( id )" + if (index > (tokens.length - 2) + || !"(".equals (tokens [index]) /*)*/ + ) + return retval; + + index++; + retval.param = parsePipeline (null); + if (index >= tokens.length) + throw new ArrayIndexOutOfBoundsException ( + "missing right paren"); + if (/*(*/ !")".equals (tokens [index++])) + throw new ArrayIndexOutOfBoundsException ( + "required right paren, not: " + tokens [index - 1]); + return retval; } @@ -313,12 +313,12 @@ public class PipelineFactory // these classes obey the conventions for constructors, so they're // only built in to this table of shortnames // - // - filter (one or two types of arglist) - // * last constructor is 'next' element - // * optional (first) string parameter + // - filter (one or two types of arglist) + // * last constructor is 'next' element + // * optional (first) string parameter // - // - terminus (one or types of arglist) - // * optional (only) string parameter + // - terminus (one or types of arglist) + // * optional (only) string parameter // // terminus stages are transformed into filters if needed, by // creating a "tee". filter stages aren't turned to terminus @@ -326,397 +326,397 @@ public class PipelineFactory // terminus explicitly. // private static final String builtinStages [][] = { - { "dom", "gnu.xml.dom.Consumer" }, - { "nsfix", "gnu.xml.pipeline.NSFilter" }, - { "null", "gnu.xml.pipeline.EventFilter" }, - { "server", "gnu.xml.pipeline.CallFilter" }, - { "tee", "gnu.xml.pipeline.TeeConsumer" }, - { "validate", "gnu.xml.pipeline.ValidationConsumer" }, - { "wf", "gnu.xml.pipeline.WellFormednessFilter" }, - { "xinclude", "gnu.xml.pipeline.XIncludeFilter" }, - { "xslt", "gnu.xml.pipeline.XsltFilter" }, + { "dom", "gnu.xml.dom.Consumer" }, + { "nsfix", "gnu.xml.pipeline.NSFilter" }, + { "null", "gnu.xml.pipeline.EventFilter" }, + { "server", "gnu.xml.pipeline.CallFilter" }, + { "tee", "gnu.xml.pipeline.TeeConsumer" }, + { "validate", "gnu.xml.pipeline.ValidationConsumer" }, + { "wf", "gnu.xml.pipeline.WellFormednessFilter" }, + { "xinclude", "gnu.xml.pipeline.XIncludeFilter" }, + { "xslt", "gnu.xml.pipeline.XsltFilter" }, // XXX want: option for validate, to preload external part of a DTD - // xhtml, write ... nyet generic-ready + // xhtml, write ... nyet generic-ready }; private static class Stage { - String id; - Pipeline param; - - Stage (String name) - { id = name; } - - public String toString () - { - if (param == null) - return id; - return id + " ( " + param + " )"; - } - - private void fail (String message) - throws IOException - { - throw new IOException ("in '" + id - + "' stage of pipeline, " + message); - } - - EventConsumer createStage (EventConsumer next) - throws IOException - { - String name = id; - - // most builtins are just class aliases - for (int i = 0; i < builtinStages.length; i++) { - if (id.equals (builtinStages [i][0])) { - name = builtinStages [i][1]; - break; - } - } - - // Save output as XML or XHTML text - if ("write".equals (name) || "xhtml".equals (name)) { - String filename; - boolean isXhtml = "xhtml".equals (name); - OutputStream out = null; - TextConsumer consumer; - - if (param == null) - fail ("parameter is required"); - - filename = param.toString (); - if ("stdout".equals (filename)) - out = System.out; - else if ("stderr".equals (filename)) - out = System.err; - else { - File f = new File (filename); + String id; + Pipeline param; + + Stage (String name) + { id = name; } + + public String toString () + { + if (param == null) + return id; + return id + " ( " + param + " )"; + } + + private void fail (String message) + throws IOException + { + throw new IOException ("in '" + id + + "' stage of pipeline, " + message); + } + + EventConsumer createStage (EventConsumer next) + throws IOException + { + String name = id; + + // most builtins are just class aliases + for (int i = 0; i < builtinStages.length; i++) { + if (id.equals (builtinStages [i][0])) { + name = builtinStages [i][1]; + break; + } + } + + // Save output as XML or XHTML text + if ("write".equals (name) || "xhtml".equals (name)) { + String filename; + boolean isXhtml = "xhtml".equals (name); + OutputStream out = null; + TextConsumer consumer; + + if (param == null) + fail ("parameter is required"); + + filename = param.toString (); + if ("stdout".equals (filename)) + out = System.out; + else if ("stderr".equals (filename)) + out = System.err; + else { + File f = new File (filename); /* - if (!f.isAbsolute ()) - fail ("require absolute file paths"); + if (!f.isAbsolute ()) + fail ("require absolute file paths"); */ - if (f.exists ()) - fail ("file already exists: " + f.getName ()); + if (f.exists ()) + fail ("file already exists: " + f.getName ()); // XXX this races against the existence test - out = new FileOutputStream (f); - } - - if (!isXhtml) - consumer = new TextConsumer (out); - else - consumer = new TextConsumer ( - new OutputStreamWriter (out, "8859_1"), - true); - - consumer.setPrettyPrinting (true); - if (next == null) - return consumer; - return new TeeConsumer (consumer, next); - - } else { - // - // Here go all the builtins that are just aliases for - // classes, and all stage IDs that started out as such - // class names. The following logic relies on several - // documented conventions for constructor invocation. - // - String msg = null; - - try { - Class klass = Class.forName (name); - Class argTypes [] = null; - Constructor constructor = null; - boolean filter = false; - Object params [] = null; - Object obj = null; - - // do we need a filter stage? - if (next != null) { - // "next" consumer is always passed, with - // or without the optional string param - if (param == null) { - argTypes = new Class [1]; - argTypes [0] = EventConsumer.class; - - params = new Object [1]; - params [0] = next; - - msg = "no-param filter"; - } else { - argTypes = new Class [2]; - argTypes [0] = String.class; - argTypes [1] = EventConsumer.class; - - params = new Object [2]; - params [0] = param.toString (); - params [1] = next; - - msg = "one-param filter"; - } - - - try { - constructor = klass.getConstructor (argTypes); - } catch (NoSuchMethodException e) { - // try creating a filter from a - // terminus and a tee - filter = true; - msg += " built from "; - } - } - - // build from a terminus stage, with or - // without the optional string param - if (constructor == null) { - String tmp; - - if (param == null) { - argTypes = new Class [0]; - params = new Object [0]; - - tmp = "no-param terminus"; - } else { - argTypes = new Class [1]; - argTypes [0] = String.class; - - params = new Object [1]; - params [0] = param.toString (); - - tmp = "one-param terminus"; - } - if (msg == null) - msg = tmp; - else - msg += tmp; - constructor = klass.getConstructor (argTypes); - // NOT creating terminus by dead-ending - // filters ... users should think about - // that one, something's likely wrong - } - - obj = constructor.newInstance (params); - - // return EventConsumers directly, perhaps after - // turning them into a filter - if (obj instanceof EventConsumer) { - if (filter) - return new TeeConsumer ((EventConsumer) obj, next); - return (EventConsumer) obj; - } - - // if it's not a handler, it's an error - // we can wrap handlers in a filter - EventFilter retval = new EventFilter (); - boolean updated = false; - - if (obj instanceof ContentHandler) { - retval.setContentHandler ((ContentHandler) obj); - updated = true; - } - if (obj instanceof DTDHandler) { - retval.setDTDHandler ((DTDHandler) obj); - updated = true; - } - if (obj instanceof LexicalHandler) { - retval.setProperty ( - EventFilter.PROPERTY_URI + "lexical-handler", - obj); - updated = true; - } - if (obj instanceof DeclHandler) { - retval.setProperty ( - EventFilter.PROPERTY_URI + "declaration-handler", - obj); - updated = true; - } - - if (!updated) - fail ("class is neither Consumer nor Handler"); - - if (filter) - return new TeeConsumer (retval, next); - return retval; - - } catch (IOException e) { - throw e; - - } catch (NoSuchMethodException e) { - fail (name + " constructor missing -- " + msg); - - } catch (ClassNotFoundException e) { - fail (name + " class not found"); - - } catch (Exception e) { - // e.printStackTrace (); - fail ("stage not available: " + e.getMessage ()); - } - } - // NOTREACHED - return null; - } + out = new FileOutputStream (f); + } + + if (!isXhtml) + consumer = new TextConsumer (out); + else + consumer = new TextConsumer ( + new OutputStreamWriter (out, "8859_1"), + true); + + consumer.setPrettyPrinting (true); + if (next == null) + return consumer; + return new TeeConsumer (consumer, next); + + } else { + // + // Here go all the builtins that are just aliases for + // classes, and all stage IDs that started out as such + // class names. The following logic relies on several + // documented conventions for constructor invocation. + // + String msg = null; + + try { + Class klass = Class.forName (name); + Class argTypes [] = null; + Constructor constructor = null; + boolean filter = false; + Object params [] = null; + Object obj = null; + + // do we need a filter stage? + if (next != null) { + // "next" consumer is always passed, with + // or without the optional string param + if (param == null) { + argTypes = new Class [1]; + argTypes [0] = EventConsumer.class; + + params = new Object [1]; + params [0] = next; + + msg = "no-param filter"; + } else { + argTypes = new Class [2]; + argTypes [0] = String.class; + argTypes [1] = EventConsumer.class; + + params = new Object [2]; + params [0] = param.toString (); + params [1] = next; + + msg = "one-param filter"; + } + + + try { + constructor = klass.getConstructor (argTypes); + } catch (NoSuchMethodException e) { + // try creating a filter from a + // terminus and a tee + filter = true; + msg += " built from "; + } + } + + // build from a terminus stage, with or + // without the optional string param + if (constructor == null) { + String tmp; + + if (param == null) { + argTypes = new Class [0]; + params = new Object [0]; + + tmp = "no-param terminus"; + } else { + argTypes = new Class [1]; + argTypes [0] = String.class; + + params = new Object [1]; + params [0] = param.toString (); + + tmp = "one-param terminus"; + } + if (msg == null) + msg = tmp; + else + msg += tmp; + constructor = klass.getConstructor (argTypes); + // NOT creating terminus by dead-ending + // filters ... users should think about + // that one, something's likely wrong + } + + obj = constructor.newInstance (params); + + // return EventConsumers directly, perhaps after + // turning them into a filter + if (obj instanceof EventConsumer) { + if (filter) + return new TeeConsumer ((EventConsumer) obj, next); + return (EventConsumer) obj; + } + + // if it's not a handler, it's an error + // we can wrap handlers in a filter + EventFilter retval = new EventFilter (); + boolean updated = false; + + if (obj instanceof ContentHandler) { + retval.setContentHandler ((ContentHandler) obj); + updated = true; + } + if (obj instanceof DTDHandler) { + retval.setDTDHandler ((DTDHandler) obj); + updated = true; + } + if (obj instanceof LexicalHandler) { + retval.setProperty ( + EventFilter.PROPERTY_URI + "lexical-handler", + obj); + updated = true; + } + if (obj instanceof DeclHandler) { + retval.setProperty ( + EventFilter.PROPERTY_URI + "declaration-handler", + obj); + updated = true; + } + + if (!updated) + fail ("class is neither Consumer nor Handler"); + + if (filter) + return new TeeConsumer (retval, next); + return retval; + + } catch (IOException e) { + throw e; + + } catch (NoSuchMethodException e) { + fail (name + " constructor missing -- " + msg); + + } catch (ClassNotFoundException e) { + fail (name + " class not found"); + + } catch (Exception e) { + // e.printStackTrace (); + fail ("stage not available: " + e.getMessage ()); + } + } + // NOTREACHED + return null; + } } private static class Pipeline { - Stage stage; - - // rest may be null - Pipeline rest; - EventConsumer next; - - Pipeline (Stage s) - { stage = s; } - - public String toString () - { - if (rest == null && next == null) - return stage.toString (); - if (rest != null) - return stage + " | " + rest; - throw new IllegalArgumentException ("next"); - } - - EventConsumer createPipeline () - throws IOException - { - if (next == null) { - if (rest == null) - next = stage.createStage (null); - else - next = stage.createStage (rest.createPipeline ()); - } - return next; - } + Stage stage; + + // rest may be null + Pipeline rest; + EventConsumer next; + + Pipeline (Stage s) + { stage = s; } + + public String toString () + { + if (rest == null && next == null) + return stage.toString (); + if (rest != null) + return stage + " | " + rest; + throw new IllegalArgumentException ("next"); + } + + EventConsumer createPipeline () + throws IOException + { + if (next == null) { + if (rest == null) + next = stage.createStage (null); + else + next = stage.createStage (rest.createPipeline ()); + } + return next; + } } /* public static void main (String argv []) { - try { - // three basic terminus cases - createPipeline ("null"); - createPipeline ("validate"); - createPipeline ("write ( stdout )"); - - // four basic filters - createPipeline ("nsfix | write ( stderr )"); - createPipeline ("wf | null"); - createPipeline ("null | null"); - createPipeline ( + try { + // three basic terminus cases + createPipeline ("null"); + createPipeline ("validate"); + createPipeline ("write ( stdout )"); + + // four basic filters + createPipeline ("nsfix | write ( stderr )"); + createPipeline ("wf | null"); + createPipeline ("null | null"); + createPipeline ( "call ( http://www.example.com/services/xml-1a ) | xhtml ( stdout )"); - // tee junctions - createPipeline ("tee ( validate ) | write ( stdout )"); - createPipeline ("tee ( nsfix | write ( stdout ) ) | validate"); - - // longer pipeline - createPipeline ("nsfix | tee ( validate ) | write ( stdout )"); - createPipeline ( - "null | wf | nsfix | tee ( validate ) | write ( stdout )"); - - // try some parsing error cases - try { - createPipeline ("null ("); // extra token '(' - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - try { - createPipeline ("nsfix |"); // extra token '|' - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - try { - createPipeline ("xhtml ( foo"); // missing right paren - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - try { - createPipeline ("xhtml ( foo bar"); // required right paren - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - try { - createPipeline ("tee ( nsfix | validate");// missing right paren - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - // try some construction error cases - - try { - createPipeline ("call"); // missing param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("call ( foobar )"); // broken param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("nsfix ( foobar )"); // illegal param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("null ( foobar )"); // illegal param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("wf ( foobar )"); // illegal param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("xhtml ( foobar.html )"); - new File ("foobar.html").delete (); - // now supported - } catch (Exception e) { - System.err.println ("** err: " + e.getMessage ()); } - try { - createPipeline ("xhtml"); // missing param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("write ( stdout ) | null"); // nonterminal - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("validate | null"); - // now supported - } catch (Exception e) { - System.err.println ("** err: " + e.getMessage ()); } - try { - createPipeline ("validate ( foo )"); // illegal param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - createPipeline ("tee"); // missing param - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - try { - // only builtins so far - createPipeline ("com.example.xml.FilterClass"); - System.err.println ("** didn't report error"); - } catch (Exception e) { - System.err.println ("== err: " + e.getMessage ()); } - - } catch (Exception e) { - e.printStackTrace (); - } + // tee junctions + createPipeline ("tee ( validate ) | write ( stdout )"); + createPipeline ("tee ( nsfix | write ( stdout ) ) | validate"); + + // longer pipeline + createPipeline ("nsfix | tee ( validate ) | write ( stdout )"); + createPipeline ( + "null | wf | nsfix | tee ( validate ) | write ( stdout )"); + + // try some parsing error cases + try { + createPipeline ("null ("); // extra token '(' + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + try { + createPipeline ("nsfix |"); // extra token '|' + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + try { + createPipeline ("xhtml ( foo"); // missing right paren + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + try { + createPipeline ("xhtml ( foo bar"); // required right paren + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + try { + createPipeline ("tee ( nsfix | validate");// missing right paren + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + // try some construction error cases + + try { + createPipeline ("call"); // missing param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("call ( foobar )"); // broken param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("nsfix ( foobar )"); // illegal param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("null ( foobar )"); // illegal param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("wf ( foobar )"); // illegal param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("xhtml ( foobar.html )"); + new File ("foobar.html").delete (); + // now supported + } catch (Exception e) { + System.err.println ("** err: " + e.getMessage ()); } + try { + createPipeline ("xhtml"); // missing param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("write ( stdout ) | null"); // nonterminal + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("validate | null"); + // now supported + } catch (Exception e) { + System.err.println ("** err: " + e.getMessage ()); } + try { + createPipeline ("validate ( foo )"); // illegal param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + createPipeline ("tee"); // missing param + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + try { + // only builtins so far + createPipeline ("com.example.xml.FilterClass"); + System.err.println ("** didn't report error"); + } catch (Exception e) { + System.err.println ("== err: " + e.getMessage ()); } + + } catch (Exception e) { + e.printStackTrace (); + } } /**/ |
