public RuleConditionElement build(final RuleBuildContext context,
final BaseDescr descr,
final Pattern prefixPattern) {
final AccumulateDescr accumDescr = (AccumulateDescr) descr;
if ( !accumDescr.hasValidInput() ) {
return null;
}
final RuleConditionBuilder builder = context.getDialect().getBuilder( accumDescr.getInput().getClass() );
final RuleConditionElement source = builder.build( context,
accumDescr.getInput() );
if ( source == null ) {
return null;
}
Accumulate accumulate = null;
if ( accumDescr.isExternalFunction() ) {
// if it is an external function, build a method for it
final JavaAnalysisResult analysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
accumDescr,
accumDescr.getExpression() );
final List[] usedIdentifiers = analysis.getBoundIdentifiers();
final List tupleDeclarations = new ArrayList();
for ( int i = 0, size = usedIdentifiers[0].size(); i < size; i++ ) {
tupleDeclarations.add( context.getDeclarationResolver().getDeclaration( (String) usedIdentifiers[0].get( i ) ) );
}
final Declaration[] previousDeclarations = (Declaration[]) tupleDeclarations.toArray( new Declaration[tupleDeclarations.size()] );
final String[] requiredGlobals = (String[]) usedIdentifiers[1].toArray( new String[usedIdentifiers[1].size()] );
final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );
final String className = "accumulateExpression" + context.getNextId();
final Map map = createVariableContext( className,
(String) accumDescr.getExpression(),
context,
previousDeclarations,
sourceDeclArr,
requiredGlobals );
map.put( "readLocalsFromTuple", accumDescr.isMultiPattern() ? Boolean.TRUE : Boolean.FALSE );
AccumulateFunction function = context.getConfiguration().getAccumulateFunction( accumDescr.getFunctionIdentifier() );
JavaAccumulatorFunctionExecutor accumulator = new JavaAccumulatorFunctionExecutor( function );
accumulate = new Accumulate( source,
previousDeclarations,
sourceDeclArr,
accumulator );
generatTemplates( "returnValueMethod",
"returnValueInvoker",
context,
className,
map,
accumulator,
accumDescr );
} else {
// ELSE, if it is not an external function, build it using the regular java builder
final String className = "Accumulate" + context.getNextId();
accumDescr.setClassName( className );
final JavaAnalysisResult initCodeAnalysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
accumDescr,
accumDescr.getInitCode() );
final Dialect.AnalysisResult actionCodeAnalysis = context.getDialect().analyzeBlock( context,
accumDescr,
accumDescr.getActionCode() );
final Dialect.AnalysisResult resultCodeAnalysis = context.getDialect().analyzeExpression( context,
accumDescr,
accumDescr.getResultCode() );
final Set requiredDeclarations = new HashSet( initCodeAnalysis.getBoundIdentifiers()[0] );
requiredDeclarations.addAll( actionCodeAnalysis.getBoundIdentifiers()[0] );
requiredDeclarations.addAll( resultCodeAnalysis.getBoundIdentifiers()[0] );
final Set requiredGlobals = new HashSet( initCodeAnalysis.getBoundIdentifiers()[1] );
requiredGlobals.addAll( actionCodeAnalysis.getBoundIdentifiers()[1] );
requiredGlobals.addAll( resultCodeAnalysis.getBoundIdentifiers()[1] );
if ( accumDescr.getReverseCode() != null ) {
final Dialect.AnalysisResult reverseCodeAnalysis = context.getDialect().analyzeBlock( context,
accumDescr,
accumDescr.getActionCode() );
requiredDeclarations.addAll( reverseCodeAnalysis.getBoundIdentifiers()[0] );
requiredGlobals.addAll( reverseCodeAnalysis.getBoundIdentifiers()[1] );
}
final Declaration[] declarations = new Declaration[requiredDeclarations.size()];
int i = 0;
for( Iterator it = requiredDeclarations.iterator(); it.hasNext(); i++ ) {
declarations[i] = context.getDeclarationResolver().getDeclaration( (String) it.next() );
}
final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );
final String[] globals = (String[]) requiredGlobals.toArray( new String[requiredGlobals.size()] );
final Map map = createVariableContext( className,
null,
context,
declarations,
null,
globals );
map.put( "className",
accumDescr.getClassName() );
map.put( "innerDeclarations",
sourceDeclArr );
map.put( "isMultiPattern",
accumDescr.isMultiPattern() ? Boolean.TRUE : Boolean.FALSE );
final String initCode = this.fixInitCode( initCodeAnalysis,
accumDescr.getInitCode() );
final String actionCode = accumDescr.getActionCode();
final String resultCode = accumDescr.getResultCode();
String[] attributesTypes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
String[] attributes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
int index = 0;
for ( Iterator it = initCodeAnalysis.getLocalVariablesMap().entrySet().iterator(); it.hasNext(); ) {
Map.Entry entry = (Map.Entry) it.next();
attributes[index] = (String) entry.getKey();
attributesTypes[index] = ((JavaLocalDeclarationDescr) entry.getValue()).getType();
}
map.put( "attributes",
attributes );
map.put( "attributesTypes",
attributesTypes );
map.put( "initCode",
initCode );
map.put( "actionCode",
actionCode );
map.put( "resultCode",
resultCode );
if ( accumDescr.getReverseCode() == null ) {
map.put( "reverseCode",
"" );
map.put( "supportsReverse",
"false" );
} else {
map.put( "reverseCode",
accumDescr.getReverseCode() );
map.put( "supportsReverse",
"true" );
}
map.put( "hashCode",