1,526c1,529
< package org.drools.lang;
< 
< /*
<  * Author Jayaram C S
<  * 
<  * Licensed under the Apache License, Version 2.0 (the "License");
<  * you may not use this file except in compliance with the License.
<  * You may obtain a copy of the License at
<  * 
<  *      http://www.apache.org/licenses/LICENSE-2.0
<  * 
<  * Unless required by applicable law or agreed to in writing, software
<  * distributed under the License is distributed on an "AS IS" BASIS,
<  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<  * See the License for the specific language governing permissions and
<  * limitations under the License.
<  */
< 
< import java.util.Collection;
< import java.util.HashSet;
< import java.util.Iterator;
< import java.util.List;
< import java.util.Set;
< 
< import org.drools.lang.descr.AccumulateDescr;
< import org.drools.lang.descr.AndDescr;
< import org.drools.lang.descr.AttributeDescr;
< import org.drools.lang.descr.CollectDescr;
< import org.drools.lang.descr.EvalDescr;
< import org.drools.lang.descr.ExistsDescr;
< import org.drools.lang.descr.FieldBindingDescr;
< import org.drools.lang.descr.FieldConstraintDescr;
< import org.drools.lang.descr.ForallDescr;
< import org.drools.lang.descr.FromDescr;
< import org.drools.lang.descr.FunctionDescr;
< import org.drools.lang.descr.FunctionImportDescr;
< import org.drools.lang.descr.GlobalDescr;
< import org.drools.lang.descr.ImportDescr;
< import org.drools.lang.descr.LiteralRestrictionDescr;
< import org.drools.lang.descr.NotDescr;
< import org.drools.lang.descr.OrDescr;
< import org.drools.lang.descr.PackageDescr;
< import org.drools.lang.descr.PackageDescrDumper;
< import org.drools.lang.descr.PatternDescr;
< import org.drools.lang.descr.PredicateDescr;
< import org.drools.lang.descr.QualifiedIdentifierRestrictionDescr;
< import org.drools.lang.descr.QueryDescr;
< import org.drools.lang.descr.RestrictionConnectiveDescr;
< import org.drools.lang.descr.ReturnValueRestrictionDescr;
< import org.drools.lang.descr.RuleDescr;
< import org.drools.lang.descr.VariableRestrictionDescr;
< import org.drools.util.ReflectiveVisitor;
< 
< /**
<  * 
<  * @author <a href="mailto:jayaramcs@gmail.com">Author Jayaram C S</a>
<  *
<  */
< public class DrlDumper extends ReflectiveVisitor
<     implements
<     PackageDescrDumper {
< 
<     private StringBuffer        drlDump;
<     private static final String eol          = System.getProperty( "line.separator" );
<     private String              template;
<     private boolean             needsBracket = false;
< 
<     public synchronized String dump(final PackageDescr packageDescr) {
<         this.drlDump = new StringBuffer();
<         visitPackageDescr( packageDescr );
<         return this.drlDump.toString();
<     }
< 
<     public String getTemplate() {
<         return this.template;
<     }
< 
<     public void visitAndDescr(final AndDescr descr) {
<         this.template = new String();
<         if ( !descr.getDescrs().isEmpty() ) {
<             this.template = processDescrList( descr.getDescrs() );
<         } else {
<             this.template = "";
<         }
<         
<     }
<     
<     private static Set needsQuotes = new HashSet();
<     static {
<         needsQuotes.add( "agenda-group" );
<         needsQuotes.add( "activation-group" );
<         needsQuotes.add( "ruleflow-group" );
<         needsQuotes.add( "date-effective" );
<         needsQuotes.add( "date-expires" );
<         needsQuotes.add( "dialect" );
<     }
<     
< 
<     public void visitAttributeDescr(final AttributeDescr attributeDescr) {
<         this.template = new String();
<         final String name = attributeDescr.getName();
<         String value = null;
<                         
<         if ( needsQuotes.contains( name) ) {
<             // These attributes may need quotes around them, if they have spaces, so add anyway
<             value = "\"" + attributeDescr.getValue() + "\"";
<         } else {
<             value = attributeDescr.getValue();
<         }
<         this.template = "\t " + name + " " + value + DrlDumper.eol;
<     }
< 
<     public void visitFieldConstraintDescr(final FieldConstraintDescr descr) {
<         if ( !descr.getRestrictions().isEmpty() ) {
<             this.template = descr.getFieldName() + " " + processFieldConstraint( descr.getRestriction(),
<                                                                                  false );
<         }
<     }
< 
<     public void visitVariableRestrictionDescr(final VariableRestrictionDescr descr) {
<         this.template = new String();
<         this.template = descr.getEvaluator() + " " + descr.getIdentifier();
<     }
< 
<     public void visitPatternDescr(final PatternDescr descr) {
<         StringBuffer buf = new StringBuffer();
<         buf.append( "\t\t" );
<         if ( descr.getIdentifier() != null ) {
<             buf.append(  descr.getIdentifier() );
<             buf.append( " : " );
<             
<         }
<         buf.append( descr.getObjectType() );
<         buf.append( "( " );
<         if ( !descr.getConstraint().getDescrs().isEmpty() ) {
<             buf.append( processColoumnConstraintList( descr.getConstraint().getDescrs() ) );
<         }
<         buf.append( " )" );
<         if( descr.getSource() != null ) {
<             buf.append( " from " );
<             this.template = buf.toString();
<             visit( descr.getSource() );
<             buf.append( this.template );
<         }
<         this.template = buf.toString();
<     }
< 
<     public void visitEvalDescr(final EvalDescr descr) {
<         this.template = new String();
<         this.template = "\t\teval ( " + descr.getContent() + " )" + DrlDumper.eol;
<     }
< 
<     public void visitExistsDescr(final ExistsDescr descr) {
<         this.template = new String();
<         if ( !descr.getDescrs().isEmpty() ) {
<             this.template = "\t\texists " + processDescrList( descr.getDescrs() ) + ";";
<         } else {
<             this.template = "";
<         }
<     }
< 
<     public void visitCollectDescr(final CollectDescr descr) {
<         String tmpstr = new String();
<         tmpstr += " collect (";
<         visitPatternDescr( descr.getInputPattern() );
<         tmpstr += this.template.substring( 2 );
<         this.template = tmpstr + ");";
<     }
< 
<     public void visitAccumulateDescr(final AccumulateDescr descr) {
<         String tmpstr = new String();
<         tmpstr += " accumulate (";
<         if ( descr.isSinglePattern() ) { 
<         	visitPatternDescr( descr.getInputPattern() );
<         } else {
<         	visit(descr.getInput());
<         }
<         tmpstr += this.template.substring( 2 );
< 
<         if ( descr.isExternalFunction() ) {
<             tmpstr += "," + descr.getFunctionIdentifier() + "(" + descr.getExpression() + ")";
<         } else {
<             tmpstr += ", init(" + descr.getInitCode() + "), ";
<             tmpstr += "action(" + descr.getActionCode() + "), ";
<             if( descr.getReverseCode() != null ) {
<                 tmpstr += " reverse(" + descr.getReverseCode() +"), ";
<             }
<             tmpstr += "result(" + descr.getResultCode() + ")";
<         }
<         this.template = tmpstr + ");";
<     }
< 
<     public void visitFromDescr(final FromDescr descr) {
<         this.template = descr.getDataSource().toString();
<     }
< 
<     public void visitForallDescr(final ForallDescr descr) {
<         String localstr = new String();
<         localstr += "\t\tforall ( ";
<         localstr += DrlDumper.eol;
< 
<         for ( final Iterator ite = descr.getDescrs().iterator(); ite.hasNext(); ) {
<             Object obj = ite.next();
<             visit( obj );
<             localstr += this.template + DrlDumper.eol;
<         }
< 
<         this.template = localstr;
<         this.template += "\t\t)";
<         this.template += DrlDumper.eol;
<     }
< 
<     public void visitFieldBindingDescr(final FieldBindingDescr descr) {
<         this.template = new String();
<         this.template = descr.getIdentifier() + " : " + descr.getFieldName();
<     }
< 
<     public void visitFunctionDescr(final FunctionDescr functionDescr) {
<         this.template = new String();
<         final String parameterTemplate = processParameters( functionDescr.getParameterNames(),
<                                                             functionDescr.getParameterTypes() );
< 
<         this.template = "function " + functionDescr.getReturnType() + " " + functionDescr.getName() + "(" + parameterTemplate + "){" +
< 
<         functionDescr.getText() + DrlDumper.eol + "}" + DrlDumper.eol;
< 
<     }
< 
<     public void visitLiteralRestrictionDescr(final LiteralRestrictionDescr descr) {
<         this.template = "";
<         String text = descr.getText();
<         if ( text == null || descr.getType() == LiteralRestrictionDescr.TYPE_NULL ) {
<             text = "null";
<         } else if( descr.getType() == LiteralRestrictionDescr.TYPE_NUMBER ) {
<             try {
<                 Integer.parseInt( text );
<             } catch ( final NumberFormatException e ) {
<                 text = "\"" + text + "\"";
<             }
<         } else if( descr.getType() == LiteralRestrictionDescr.TYPE_STRING ) {
<             text = "\"" + text + "\"";
<         }
<         this.template = descr.getEvaluator() + " " + text;
<     }
< 
<     public void visitQualifiedIdentifierRestrictionDescr(final QualifiedIdentifierRestrictionDescr descr) {
<         this.template = descr.getEvaluator() + " " + descr.getText();
<     }
< 
<     public void visitRestrictionConnectiveDescr(final RestrictionConnectiveDescr descr) {
<         String tmp = this.processFieldConstraint( descr,
<                                                   true );
<         this.template = tmp;
<     }
< 
<     public void visitNotDescr(final NotDescr descr) {
<         this.template = new String();
<         if ( !descr.getDescrs().isEmpty() ) {
<             this.template = "\t   not ( " + processDescrList( descr.getDescrs() ) +")";
<         } else {
<             this.template = "";
<         }
<     }
< 
<     public void visitOrDescr(final OrDescr descr) {
<         this.template = new String();
<         if ( !descr.getDescrs().isEmpty() ) {
<             this.template = processOrDescrList( descr.getDescrs() );
<         } else {
<             this.template = " ";
<         }
<     }
< 
<     public void visitPackageDescr(final PackageDescr packageDescr) {
<         final String packageName = packageDescr.getName();
<         final String xmlString = "package " + packageName + ";" + DrlDumper.eol + DrlDumper.eol;
< 
<         appendDrlDump( xmlString );
<         if ( packageDescr.getImports() != null ) {
<             appendDrlDump( processImportsList( packageDescr.getImports() ) );
<         }
<         if ( packageDescr.getGlobals() != null ) {
<             appendDrlDump( processGlobalsList( packageDescr.getGlobals() ) );
<         }
<         if ( packageDescr.getFunctionImports() != null ) {
<             appendDrlDump( processFunctionImportsList( packageDescr.getFunctionImports() ) );
<         }
<         if ( packageDescr.getFunctions() != null ) {
<             appendDrlDump( processFunctionsList( packageDescr.getFunctions() ) );
<         }
<         if ( packageDescr.getRules() != null ) {
<             appendDrlDump( processRules( packageDescr.getRules() ) );
<         }
< 
<     }
< 
<     public void visitPredicateDescr(final PredicateDescr descr) {
<         this.template = new String();
<         this.template = "eval( " + descr.getContent() + " )";
< 
<     }
< 
<     public void visitReturnValueRestrictionDescr(final ReturnValueRestrictionDescr descr) {
<         this.template = new String();
<         this.template = descr.getEvaluator() + " ( " + descr.getContent() + ")";
<     }
< 
<     public void visitQueryDescr(final QueryDescr descr) {
<         this.template = new String();
<         this.template = "query \"" + descr.getName() + "\"" + processDescrList( descr.getLhs().getDescrs() )  + "end";
<     }
<     
< 
<     private String processRules(final List rules) {
<         String ruleList = "";
<         Object ruleobj;
<         for ( final Iterator iterator = rules.iterator(); iterator.hasNext(); ) {
<         	ruleobj = iterator.next();
<         	if ( ruleobj instanceof QueryDescr ) {
<         		visitQueryDescr((QueryDescr) ruleobj);
<         		ruleList += this.template;
<         		break;
<         	}
< 
<         	final RuleDescr ruleDescr = (RuleDescr) ruleobj;
<             String rule = "rule \"" + ruleDescr.getName() + "\" " + DrlDumper.eol;
<             final String attribute = processAttribute( ruleDescr.getAttributes().values() );
<             String lhs = "";
<             if ( !ruleDescr.getLhs().getDescrs().isEmpty() ) {
<                 lhs = "\t when" + DrlDumper.eol + processDescrList( ruleDescr.getLhs().getDescrs() ) + DrlDumper.eol;
<             } else {
< 
<                 lhs = "\t when";
<             }
< 
<             String rhs = (String) ruleDescr.getConsequence();
<             if ( rhs == null ) {
<                 rhs = "\t then" + DrlDumper.eol + "\t";
<             } else {
<                 rhs = "\t then" + DrlDumper.eol + ruleDescr.getConsequence();
<             }
< 
<             rule += attribute;
<             rule += lhs;
<             rule += rhs;
<             rule += "end" + DrlDumper.eol;
<             ruleList += rule;
<         }
< 
<         return ruleList + DrlDumper.eol;
<     }
< 
<     private String processOrDescrList(final List descr) {
<         String descrString = "";
<         for ( final Iterator iterator = descr.iterator(); iterator.hasNext(); ) {
<             visit( iterator.next() );
<             descrString += this.template;
<             if ( descrString.endsWith( DrlDumper.eol ) ) {
<                 descrString = descrString.substring( 0,
<                                                      descrString.indexOf( DrlDumper.eol ) );
<             }
<             descrString += " || ";
<         }
<         return descrString.substring( 0,
<                                       descrString.length() - 4 );
<     }
< 
<     private String processColoumnConstraintList(final List descr) {
<         String descrString = "";
<         Object previous = null;
<         for ( final Iterator iterator = descr.iterator(); iterator.hasNext(); ) {
< 
<             final Object temp = iterator.next();
<             visit( temp );
< 
<             if ( previous == null ) {
<                 descrString += this.template;
<             } else if ( previous instanceof FieldBindingDescr && !(temp instanceof FieldBindingDescr) && !(temp instanceof PredicateDescr) ) {
<                 final FieldConstraintDescr tempDescr = (FieldConstraintDescr) temp;
<                 final FieldBindingDescr previousDescr = (FieldBindingDescr) previous;
<                 if ( tempDescr.getFieldName().equals( previousDescr.getFieldName() ) ) {
<                     // as its a binding followed by a field constraint we need to remove 
<                     // the extra field name                    
<                     descrString += this.template.substring( tempDescr.getFieldName().length() + 1 );
<                 } else {
<                     descrString += " , " + this.template;
<                 }
<             } else {
<                 descrString += " , " + this.template;
<             }
< 
<             previous = temp;
< 
<         }
<         return descrString.substring( 0,
<                                       descrString.length() );
<     }
< 
<     private String processFieldConstraint(final RestrictionConnectiveDescr restriction,
<                                           boolean addBrackets) {
<         String descrString = "";
<         String connective = "";
<         boolean bracketTmp = this.needsBracket;
<         this.needsBracket = restriction.getRestrictions().size() > 1;
< 
<         if ( restriction.getConnective() == RestrictionConnectiveDescr.OR ) {
<             connective = " || ";
<         } else {
<             connective = " && ";
<         }
<         if ( addBrackets && bracketTmp ) {
<             descrString += "( ";
<         }
<         for ( final Iterator it = restriction.getRestrictions().iterator(); it.hasNext(); ) {
<             final Object temp = it.next();
<             visit( temp );
<             descrString += this.template;
<             if ( it.hasNext() ) {
<                 descrString += connective;
<             }
<         }
<         if ( addBrackets && bracketTmp ) {
<             descrString += " )";
<         }
<         this.needsBracket = bracketTmp;
<         return descrString;
<     }
< 
<     private String processDescrList(final List descr) {
<         String descrString = "";
<         for ( final Iterator ite = descr.iterator(); ite.hasNext(); ) {
< 
<             Object obj = ite.next();
< 
<             visit( obj );
<             descrString += this.template;
< 
<             if ( obj.getClass().equals( PatternDescr.class ) || obj.getClass().equals( CollectDescr.class ) ) {
<                 descrString += DrlDumper.eol;
<             } else if ( ite.hasNext() ) {
<                 descrString += " && ";
<             }
<         }
<         return descrString;
<     }
< 
<     private String processFunctionsList(final List functions) {
<         String functionList = "";
< 
<         for ( final Iterator it = functions.iterator(); it.hasNext(); ) {
<             visit( it.next() );
<             functionList += this.template;
<         }
< 
<         return functionList + DrlDumper.eol;
<     }
< 
<     private String processAttribute(final Collection<AttributeDescr> attributes) {
< 
<         String attributeList = "";
<         for ( final AttributeDescr attributeDescr : attributes) {
<             visit( attributeDescr );
<             attributeList += this.template;
<         }
<         return attributeList;
<     }
< 
<     private String processParameters(final List parameterNames,
<                                      final List parameterTypes) {
<         if ( parameterNames.isEmpty() ) {
<             return "";
<         }
< 
<         String paramList = "";
<         int i = 0;
<         for ( final Iterator it = parameterNames.iterator(); it.hasNext(); i++ ) {
<             final String paramName = (String) it.next();
<             final String paramType = (String) parameterTypes.get( i );
<             final String paramTemplate = paramType + " " + paramName + ",";
<             paramList += paramTemplate;
<         }
<         paramList = paramList.substring( 0,
<                                          paramList.length() - 1 );
<         return paramList;
<     }
< 
<     private String processGlobalsList(final List globals) {
<         String globalList = "";
< 
<         for ( final Iterator it = globals.iterator(); it.hasNext(); ) {
<             final GlobalDescr global = (GlobalDescr) it.next();
<             final String identifier = global.getIdentifier();
<             final String type = global.getType();
<             final String globalTemplate = "global " + type + " " + identifier + ";" + DrlDumper.eol;
<             globalList += globalTemplate;
<         }
< 
<         return globalList + DrlDumper.eol;
<     }
<     
<     private String processFunctionImportsList(final List imports) {
<         String importList = "";
< 
<         for ( final Iterator it = imports.iterator(); it.hasNext(); ) {
<             final String importString = ((FunctionImportDescr) it.next()).getTarget();
<             final String importTemplate = "import function " + importString + ";" + DrlDumper.eol;
<             importList += importTemplate;
<         }
<         return importList + DrlDumper.eol;
<     }
< 
<     private String processImportsList(final List imports) {
<         String importList = "";
< 
<         for ( final Iterator it = imports.iterator(); it.hasNext(); ) {
<             final ImportDescr importDescr = (ImportDescr) it.next(); 
<             final String importTemplate = "import " + importDescr.getTarget() + ";" + DrlDumper.eol;
<             importList += importTemplate;
<         }
<         return importList + DrlDumper.eol;
<     }
< 
<     private void appendDrlDump(final String temp) {
<         this.drlDump.append( temp );
<     }
< 
---
> package org.drools.lang;
> 
> /*
>  * Author Jayaram C S
>  * 
>  * Licensed under the Apache License, Version 2.0 (the "License");
>  * you may not use this file except in compliance with the License.
>  * You may obtain a copy of the License at
>  * 
>  *      http://www.apache.org/licenses/LICENSE-2.0
>  * 
>  * Unless required by applicable law or agreed to in writing, software
>  * distributed under the License is distributed on an "AS IS" BASIS,
>  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
>  * See the License for the specific language governing permissions and
>  * limitations under the License.
>  */
> 
> import java.util.Collection;
> import java.util.HashSet;
> import java.util.Iterator;
> import java.util.List;
> import java.util.Set;
> 
> import org.drools.lang.descr.AccumulateDescr;
> import org.drools.lang.descr.AndDescr;
> import org.drools.lang.descr.AttributeDescr;
> import org.drools.lang.descr.CollectDescr;
> import org.drools.lang.descr.EvalDescr;
> import org.drools.lang.descr.ExistsDescr;
> import org.drools.lang.descr.FieldBindingDescr;
> import org.drools.lang.descr.FieldConstraintDescr;
> import org.drools.lang.descr.ForallDescr;
> import org.drools.lang.descr.FromDescr;
> import org.drools.lang.descr.FunctionDescr;
> import org.drools.lang.descr.FunctionImportDescr;
> import org.drools.lang.descr.GlobalDescr;
> import org.drools.lang.descr.ImportDescr;
> import org.drools.lang.descr.LiteralRestrictionDescr;
> import org.drools.lang.descr.NotDescr;
> import org.drools.lang.descr.OrDescr;
> import org.drools.lang.descr.PackageDescr;
> import org.drools.lang.descr.PackageDescrDumper;
> import org.drools.lang.descr.PatternDescr;
> import org.drools.lang.descr.PredicateDescr;
> import org.drools.lang.descr.QualifiedIdentifierRestrictionDescr;
> import org.drools.lang.descr.QueryDescr;
> import org.drools.lang.descr.RestrictionConnectiveDescr;
> import org.drools.lang.descr.ReturnValueRestrictionDescr;
> import org.drools.lang.descr.RuleDescr;
> import org.drools.lang.descr.VariableRestrictionDescr;
> import org.drools.util.ReflectiveVisitor;
> 
> /**
>  * 
>  * @author <a href="mailto:jayaramcs@gmail.com">Author Jayaram C S</a>
>  *
>  */
> public class DrlDumper extends ReflectiveVisitor
>     implements
>     PackageDescrDumper {
> 
>     private StringBuffer        drlDump;
>     private static final String eol          = System.getProperty( "line.separator" );
>     private String              template;
>     private boolean             needsBracket = false;
> 
>     public synchronized String dump(final PackageDescr packageDescr) {
>         this.drlDump = new StringBuffer();
>         visitPackageDescr( packageDescr );
>         return this.drlDump.toString();
>     }
> 
>     public String getTemplate() {
>         return this.template;
>     }
> 
>     public void visitAndDescr(final AndDescr descr) {
>         this.template = new String();
>         if ( !descr.getDescrs().isEmpty() ) {
>             this.template = processDescrList( descr.getDescrs() );
>         } else {
>             this.template = "";
>         }
>     }
>     
>     private static Set needsQuotes = new HashSet();
>     static {
>         needsQuotes.add( "agenda-group" );
>         needsQuotes.add( "activation-group" );
>         needsQuotes.add( "ruleflow-group" );
>         needsQuotes.add( "date-effective" );
>         needsQuotes.add( "date-expires" );
>         needsQuotes.add( "dialect" );
>     }
>     
> 
>     public void visitAttributeDescr(final AttributeDescr attributeDescr) {
>         this.template = new String();
>         final String name = attributeDescr.getName();
>         String value = null;
>                         
>         if ( needsQuotes.contains( name) ) {
>             // These attributes may need quotes around them, if they have spaces, so add anyway
>             value = "\"" + attributeDescr.getValue() + "\"";
>         } else {
>             value = attributeDescr.getValue();
>         }
>         this.template = "\t " + name + " " + value + DrlDumper.eol;
>     }
> 
>     public void visitFieldConstraintDescr(final FieldConstraintDescr descr) {
>         if ( !descr.getRestrictions().isEmpty() ) {
>             this.template = descr.getFieldName() + " " + processFieldConstraint( descr.getRestriction(),
>                                                                                  false );
>         }
>     }
> 
>     public void visitVariableRestrictionDescr(final VariableRestrictionDescr descr) {
>         this.template = new String();
>         this.template = descr.getEvaluator() + " " + descr.getIdentifier();
>     }
> 
>     public void visitPatternDescr(final PatternDescr descr) {
>         StringBuffer buf = new StringBuffer();
>         buf.append( "\t\t" );
>         if ( descr.getIdentifier() != null ) {
>             buf.append(  descr.getIdentifier() );
>             buf.append( " : " );
>             
>         }
>         buf.append( descr.getObjectType() );
>         buf.append( "( " );
>         if ( !descr.getConstraint().getDescrs().isEmpty() ) {
>             buf.append( processColoumnConstraintList( descr.getConstraint().getDescrs() ) );
>         }
>         buf.append( " )" );
>         if( descr.getSource() != null ) {
>             buf.append( " from " );
>             this.template = buf.toString();
>             visit( descr.getSource() );
>             buf.append( this.template );
>         }
>         this.template = buf.toString();
>     }
> 
>     public void visitEvalDescr(final EvalDescr descr) {
>         this.template = new String();
>         this.template = "\t\teval ( " + descr.getContent() + " )" + DrlDumper.eol;
>     }
> 
>     public void visitExistsDescr(final ExistsDescr descr) {
>         this.template = new String();
>         if ( !descr.getDescrs().isEmpty() ) {
>             this.template = "\t\texists " + processDescrList( descr.getDescrs() ) + ";";
>         } else {
>             this.template = "";
>         }
>     }
> 
>     public void visitCollectDescr(final CollectDescr descr) {
>         String tmpstr = new String();
>         tmpstr += " collect (";
>         visitPatternDescr( descr.getInputPattern() );
>         tmpstr += this.template.substring( 2 );
>         this.template = tmpstr + ");";
>     }
> 
>     public void visitAccumulateDescr(final AccumulateDescr descr) {
>         String tmpstr = new String();
>         tmpstr += " accumulate (";
>         if ( descr.isSinglePattern() ) { 
>         	visitPatternDescr( descr.getInputPattern() );
>         } else {
>         	visit(descr.getInput());
>         }
>         tmpstr += this.template.substring( 2 );
> 
>         if ( descr.isExternalFunction() ) {
>             tmpstr += "," + descr.getFunctionIdentifier() + "(" + descr.getExpression() + ")";
>         } else {
>             tmpstr += ", init(" + descr.getInitCode() + "), ";
>             tmpstr += "action(" + descr.getActionCode() + "), ";
>             if( descr.getReverseCode() != null ) {
>                 tmpstr += " reverse(" + descr.getReverseCode() +"), ";
>             }
>             tmpstr += "result(" + descr.getResultCode() + ")";
>         }
>         this.template = tmpstr + ");";
>     }
> 
>     public void visitFromDescr(final FromDescr descr) {
>         this.template = descr.getDataSource().toString();
>     }
> 
>     public void visitForallDescr(final ForallDescr descr) {
>         String localstr = new String();
>         localstr += "\t\tforall ( ";
>         localstr += DrlDumper.eol;
> 
>         for ( final Iterator ite = descr.getDescrs().iterator(); ite.hasNext(); ) {
>             Object obj = ite.next();
>             visit( obj );
>             localstr += this.template + DrlDumper.eol;
>         }
> 
>         this.template = localstr;
>         this.template += "\t\t)";
>         this.template += DrlDumper.eol;
>     }
> 
>     public void visitFieldBindingDescr(final FieldBindingDescr descr) {
>         this.template = new String();
>         this.template = descr.getIdentifier() + " : " + descr.getFieldName();
>     }
> 
>     public void visitFunctionDescr(final FunctionDescr functionDescr) {
>         this.template = new String();
>         final String parameterTemplate = processParameters( functionDescr.getParameterNames(),
>                                                             functionDescr.getParameterTypes() );
> 
>         this.template = "function " + functionDescr.getReturnType() + " " + functionDescr.getName() + "(" + parameterTemplate + "){" +
> 
>         functionDescr.getText() + DrlDumper.eol + "}" + DrlDumper.eol;
> 
>     }
> 
>     public void visitLiteralRestrictionDescr(final LiteralRestrictionDescr descr) {
>         this.template = "";
>         String text = descr.getText();
>         if ( text == null || descr.getType() == LiteralRestrictionDescr.TYPE_NULL ) {
>             text = "null";
>         } else if( descr.getType() == LiteralRestrictionDescr.TYPE_NUMBER ) {
>             try {
>                 Integer.parseInt( text );
>             } catch ( final NumberFormatException e ) {
>                 text = "\"" + text + "\"";
>             }
>         } else if( descr.getType() == LiteralRestrictionDescr.TYPE_STRING ) {
>             text = "\"" + text + "\"";
>         }
>         this.template = descr.getEvaluator() + " " + text;
>     }
> 
>     public void visitQualifiedIdentifierRestrictionDescr(final QualifiedIdentifierRestrictionDescr descr) {
>         this.template = descr.getEvaluator() + " " + descr.getText();
>     }
> 
>     public void visitRestrictionConnectiveDescr(final RestrictionConnectiveDescr descr) {
>         String tmp = this.processFieldConstraint( descr,
>                                                   true );
>         this.template = tmp;
>     }
> 
>     public void visitNotDescr(final NotDescr descr) {
>         this.template = new String();
>         if ( !descr.getDescrs().isEmpty() ) {
>             this.template = "\t   not ( " + processDescrList( descr.getDescrs() ) +")";
>         } else {
>             this.template = "";
>         }
>     }
> 
>     public void visitOrDescr(final OrDescr descr) {
>         this.template = new String();
>         if ( !descr.getDescrs().isEmpty() ) {
>             this.template = processOrDescrList( descr.getDescrs() );
>         } else {
>             this.template = " ";
>         }
>     }
> 
>     public void visitPackageDescr(final PackageDescr packageDescr) {
>         final String packageName = packageDescr.getName();
>         final String xmlString = "package " + packageName + ";" + DrlDumper.eol + DrlDumper.eol;
> 
>         appendDrlDump( xmlString );
>         if ( packageDescr.getImports() != null ) {
>             appendDrlDump( processImportsList( packageDescr.getImports() ) );
>         }
>         if ( packageDescr.getGlobals() != null ) {
>             appendDrlDump( processGlobalsList( packageDescr.getGlobals() ) );
>         }
>         if ( packageDescr.getFunctionImports() != null ) {
>             appendDrlDump( processFunctionImportsList( packageDescr.getFunctionImports() ) );
>         }
>         if ( packageDescr.getFunctions() != null ) {
>             appendDrlDump( processFunctionsList( packageDescr.getFunctions() ) );
>         }
>         if ( packageDescr.getRules() != null ) {
>             appendDrlDump( processRules( packageDescr.getRules() ) );
>         }
> 
>     }
> 
>     public void visitPredicateDescr(final PredicateDescr descr) {
>         this.template = new String();
>         this.template = "eval( " + descr.getContent() + " )";
> 
>     }
> 
>     public void visitReturnValueRestrictionDescr(final ReturnValueRestrictionDescr descr) {
>         this.template = new String();
>         this.template = descr.getEvaluator() + " ( " + descr.getContent() + ")";
>     }
> 
>     public void visitQueryDescr(final QueryDescr descr) {
>         this.template = new String();
>         this.template = "query \"" + descr.getName() + "\"" + processDescrList( descr.getLhs().getDescrs() )  + "end";
>     }
>     
> 
>     private String processRules(final List rules) {
>         String ruleList = "";
>         Object ruleobj;
>         for ( final Iterator iterator = rules.iterator(); iterator.hasNext(); ) {
>         	ruleobj = iterator.next();
>         	if ( ruleobj instanceof QueryDescr ) {
>         		visitQueryDescr((QueryDescr) ruleobj);
>         		ruleList += this.template;
>         		break;
>         	}
> 
>         	final RuleDescr ruleDescr = (RuleDescr) ruleobj;
>             String rule = "rule \"" + ruleDescr.getName() + "\" " + DrlDumper.eol;
>             final String attribute = processAttribute( ruleDescr.getAttributes().values() );
>             String lhs = "";
>             if ( !ruleDescr.getLhs().getDescrs().isEmpty() ) {
>                 lhs = "\t when" + DrlDumper.eol + processDescrList( ruleDescr.getLhs().getDescrs() ) + DrlDumper.eol;
>             } else {
> 
>                 lhs = "\t when";
>             }
> 
>             String rhs = (String) ruleDescr.getConsequence();
>             if ( rhs == null ) {
>                 rhs = "\t then" + DrlDumper.eol + "\t";
>             } else {
>                 rhs = "\t then" + DrlDumper.eol + ruleDescr.getConsequence();
>             }
> 
>             rule += attribute;
>             rule += lhs;
>             rule += rhs;
>             rule += "end" + DrlDumper.eol;
>             ruleList += rule;
>         }
> 
>         return ruleList + DrlDumper.eol;
>     }
> 
>     private String processOrDescrList(final List descr) {
>         String descrString = "( ";
>         for ( final Iterator iterator = descr.iterator(); iterator.hasNext(); ) {
>             visit( iterator.next() );
>             descrString += this.template;
>             if ( descrString.endsWith( DrlDumper.eol ) ) {
>                 descrString = descrString.substring( 0,
>                                                      descrString.lastIndexOf( DrlDumper.eol ) );
>                 
>                 descrString = descrString.replace( DrlDumper.eol + " &&", DrlDumper.eol );
>                 descrString = descrString.replace( DrlDumper.eol, " && " );
> 
>             }
>             descrString += ") || (";
>         }
>         return descrString.substring( 0,
>                                       descrString.length() - 6) + ")";
>     }
> 
>     private String processColoumnConstraintList(final List descr) {
>         String descrString = "";
>         Object previous = null;
>         for ( final Iterator iterator = descr.iterator(); iterator.hasNext(); ) {
> 
>             final Object temp = iterator.next();
>             visit( temp );
> 
>             if ( previous == null ) {
>                 descrString += this.template;
>             } else if ( previous instanceof FieldBindingDescr && !(temp instanceof FieldBindingDescr) && !(temp instanceof PredicateDescr) ) {
>                 final FieldConstraintDescr tempDescr = (FieldConstraintDescr) temp;
>                 final FieldBindingDescr previousDescr = (FieldBindingDescr) previous;
>                 if ( tempDescr.getFieldName().equals( previousDescr.getFieldName() ) ) {
>                     // as its a binding followed by a field constraint we need to remove 
>                     // the extra field name                    
>                     descrString += this.template.substring( tempDescr.getFieldName().length() + 1 );
>                 } else {
>                     descrString += " , " + this.template;
>                 }
>             } else {
>                 descrString += " , " + this.template;
>             }
> 
>             previous = temp;
> 
>         }
>         return descrString.substring( 0,
>                                       descrString.length() );
>     }
> 
>     private String processFieldConstraint(final RestrictionConnectiveDescr restriction,
>                                           boolean addBrackets) {
>         String descrString = "";
>         String connective = "";
>         boolean bracketTmp = this.needsBracket;
>         this.needsBracket = restriction.getRestrictions().size() > 1;
> 
>         if ( restriction.getConnective() == RestrictionConnectiveDescr.OR ) {
>             connective = " || ";
>         } else {
>             connective = " && ";
>         }
>         if ( addBrackets && bracketTmp ) {
>             descrString += "( ";
>         }
>         for ( final Iterator it = restriction.getRestrictions().iterator(); it.hasNext(); ) {
>             final Object temp = it.next();
>             visit( temp );
>             descrString += this.template;
>             if ( it.hasNext() ) {
>                 descrString += connective;
>             }
>         }
>         if ( addBrackets && bracketTmp ) {
>             descrString += " )";
>         }
>         this.needsBracket = bracketTmp;
>         return descrString;
>     }
> 
>     private String processDescrList(final List descr) {
>         String descrString = "";
>         for ( final Iterator ite = descr.iterator(); ite.hasNext(); ) {
> 
>             Object obj = ite.next();
> 
>             visit( obj );
>             descrString += this.template;
> 
>             if ( obj.getClass().equals( PatternDescr.class ) || obj.getClass().equals( CollectDescr.class ) ) {
>                 descrString += DrlDumper.eol;
>             } else if ( ite.hasNext() ) {
>                 descrString += " && ";
>             }
>         }
>         return descrString;
>     }
> 
>     private String processFunctionsList(final List functions) {
>         String functionList = "";
> 
>         for ( final Iterator it = functions.iterator(); it.hasNext(); ) {
>             visit( it.next() );
>             functionList += this.template;
>         }
> 
>         return functionList + DrlDumper.eol;
>     }
> 
>     private String processAttribute(final Collection<AttributeDescr> attributes) {
> 
>         String attributeList = "";
>         for ( final AttributeDescr attributeDescr : attributes) {
>             visit( attributeDescr );
>             attributeList += this.template;
>         }
>         return attributeList;
>     }
> 
>     private String processParameters(final List parameterNames,
>                                      final List parameterTypes) {
>         if ( parameterNames.isEmpty() ) {
>             return "";
>         }
> 
>         String paramList = "";
>         int i = 0;
>         for ( final Iterator it = parameterNames.iterator(); it.hasNext(); i++ ) {
>             final String paramName = (String) it.next();
>             final String paramType = (String) parameterTypes.get( i );
>             final String paramTemplate = paramType + " " + paramName + ",";
>             paramList += paramTemplate;
>         }
>         paramList = paramList.substring( 0,
>                                          paramList.length() - 1 );
>         return paramList;
>     }
> 
>     private String processGlobalsList(final List globals) {
>         String globalList = "";
> 
>         for ( final Iterator it = globals.iterator(); it.hasNext(); ) {
>             final GlobalDescr global = (GlobalDescr) it.next();
>             final String identifier = global.getIdentifier();
>             final String type = global.getType();
>             final String globalTemplate = "global " + type + " " + identifier + ";" + DrlDumper.eol;
>             globalList += globalTemplate;
>         }
> 
>         return globalList + DrlDumper.eol;
>     }
>     
>     private String processFunctionImportsList(final List imports) {
>         String importList = "";
> 
>         for ( final Iterator it = imports.iterator(); it.hasNext(); ) {
>             final String importString = ((FunctionImportDescr) it.next()).getTarget();
>             final String importTemplate = "import function " + importString + ";" + DrlDumper.eol;
>             importList += importTemplate;
>         }
>         return importList + DrlDumper.eol;
>     }
> 
>     private String processImportsList(final List imports) {
>         String importList = "";
> 
>         for ( final Iterator it = imports.iterator(); it.hasNext(); ) {
>             final ImportDescr importDescr = (ImportDescr) it.next(); 
>             final String importTemplate = "import " + importDescr.getTarget() + ";" + DrlDumper.eol;
>             importList += importTemplate;
>         }
>         return importList + DrlDumper.eol;
>     }
> 
>     private void appendDrlDump(final String temp) {
>         this.drlDump.append( temp );
>     }
>