private FormulaVariable findUniversalVariableForTargetPath(
VariablePathExpression attributePath, List<FormulaVariable> universalFormulaVariables) {
for (FormulaVariable formulaVariable : universalFormulaVariables) {
if (SpicyEngineUtility.containsPathWithSameVariableId(
formulaVariable.getTargetOccurrencePaths(), attributePath)) {
return formulaVariable;
}
}
return null;
}
private FormulaVariable findExistentialVariable(
VariablePathExpression attributePath, List<FormulaVariable> existentialFormulaVariables) {
for (FormulaVariable formulaVariable : existentialFormulaVariables) {
if (SpicyEngineUtility.containsPathWithSameVariableId(
formulaVariable.getTargetOccurrencePaths(), attributePath)) {
return formulaVariable;
}
}
throw new IllegalArgumentException(
"Unable to find variable for path "
+ attributePath
+ " in "
+ SpicyEngineUtility.printVariableList(existentialFormulaVariables));
}
/////////////////////////// SKOLEMS ///////////////////////////////
private String printSkolems(FORule rule, MappingTask mappingTask) {
StringBuilder result = new StringBuilder();
List<FormulaVariable> existentialVariables = rule.getExistentialFormulaVariables(mappingTask);
for (FormulaVariable variable : existentialVariables) {
String generatorString = findGeneratorForVariable(variable, rule, mappingTask);
result.append(variable.toShortString()).append(": ").append(generatorString).append("\n");
}
if (mappingTask.getTargetProxy().isNested()) {
for (SetAlias alias : rule.getTargetView().getGenerators()) {
VariablePathExpression bindingPath = alias.getBindingPathExpression();
String generatorString = findGeneratorForPath(bindingPath, rule, mappingTask);
result.append(alias.toShortString()).append(": ").append(generatorString).append("\n");
}
}
return result.toString();
}
private FormulaVariable findVariableForPath(
VariablePathExpression attributePath, List<List<FormulaVariable>> variables) {
// for (int i = variables.size() - 1; i >= 0; i--) {
for (int i = 0; i < variables.size(); i++) {
List<FormulaVariable> variableList = variables.get(i);
for (FormulaVariable formulaVariable : variableList) {
if (SpicyEngineUtility.containsPathWithSameVariableId(
formulaVariable.getOriginalSourceOccurrencePaths(), attributePath)) {
return formulaVariable;
}
}
for (FormulaVariable formulaVariable : variableList) {
if (SpicyEngineUtility.containsPathWithSameVariableId(
formulaVariable.getSourceOccurrencePaths(), attributePath)) {
return formulaVariable;
}
}
}
throw new IllegalArgumentException(
"Unable to find variable for path "
+ attributePath
+ " in "
+ SpicyEngineUtility.printListOfVariableLists(variables));
}
private String generateConjunctionString(
List<SetAlias> setVariables, List<List<FormulaVariable>> variables, INode schema) {
StringBuilder localResult = new StringBuilder();
List<SetAlias> sortedAliases = new ArrayList<SetAlias>(setVariables);
Collections.sort(sortedAliases);
for (int i = 0; i < sortedAliases.size(); i++) {
SetAlias sourceVariable = sortedAliases.get(i);
localResult.append(generateIndent());
if (!useSaveFormat) {
localResult.append(
utility.printAtomName(sourceVariable, mappingTask.getSourceProxy().isNested()));
} else {
localResult.append(
utility.printAtomNameForSaveFormat(
sourceVariable, mappingTask.getSourceProxy().isNested()));
}
List<VariablePathExpression> attributePaths = sourceVariable.getFirstLevelAttributes(schema);
for (int j = 0; j < attributePaths.size(); j++) {
VariablePathExpression attributePath = attributePaths.get(j);
FormulaVariable attributeVariable = findVariableForPath(attributePath, variables);
localResult.append(attributePath.getLastStep()).append(": ");
if (useSaveFormat) {
localResult.append("$");
}
localResult.append(attributeVariable.toShortString());
if (j != attributePaths.size() - 1) {
localResult.append(", ");
}
}
localResult.append(")");
if (i != sortedAliases.size() - 1) {
localResult.append(", \n");
}
}
return localResult.toString();
}
private String findGeneratorForVariable(
FormulaVariable variable, FORule rule, MappingTask mappingTask) {
List<FormulaVariable> universalVariables =
rule.getUniversalFormulaVariablesInTarget(mappingTask);
TGDGeneratorsMap generatorsMap = rule.getGenerators(mappingTask);
for (VariablePathExpression targetPath : variable.getTargetOccurrencePaths()) {
IValueGenerator generator =
generatorsMap.getGeneratorForLeaf(
targetPath, mappingTask.getTargetProxy().getIntermediateSchema());
if (generator != null && generator instanceof SkolemFunctionGenerator) {
SkolemFunctionGenerator skolemGenerator = (SkolemFunctionGenerator) generator;
return skolemGenerator.toStringWithVariableArguments(universalVariables);
}
}
return NullValueGenerator.getInstance().toString();
// throw new IllegalArgumentException("Unable to find generator for variable: " +
// variable.toLongString() + "\nin rule: " + rule + "\n" +
// SpicyEngineUtility.printVariableList(rule.getExistentialFormulaVariables(mappingTask)) +
// "\nGenerators: " + generatorsMap);
}
//////////////////////////////// CONCLUSION ////////////////////////////////////////////////
public String conclusionString(FORule tgd, MappingTask mappingTask, String indent) {
// giannisk
// find target paths that have a constant value correspondence
List<VariablePathExpression> constantTargetPaths = new ArrayList<VariablePathExpression>();
HashMap<VariablePathExpression, ISourceValue> constantValueMap =
new HashMap<VariablePathExpression, ISourceValue>();
for (VariableCorrespondence varCor : tgd.getCoveredCorrespondences()) {
if (varCor.isConstant()) {
constantTargetPaths.add(varCor.getTargetPath());
constantValueMap.put(varCor.getTargetPath(), varCor.getSourceValue());
}
}
StringBuilder result = new StringBuilder();
List<FormulaVariable> universalVariables = tgd.getUniversalFormulaVariables(mappingTask);
List<FormulaVariable> existentialVariables = tgd.getExistentialFormulaVariables(mappingTask);
if (!useSaveFormat
&& (!existentialVariables.isEmpty() || mappingTask.getTargetProxy().isNested())) {
result.append("exist ");
if (mappingTask.getTargetProxy().isNested()) {
utility.printOIDVariables(tgd.getTargetView());
}
if (!existentialVariables.isEmpty()) {
result.append(utility.printVariables(existentialVariables));
}
}
result.append("\n");
for (int i = 0; i < tgd.getTargetView().getGenerators().size(); i++) {
SetAlias targetVariable = tgd.getTargetView().getGenerators().get(i);
result.append(indent).append(utility.INDENT);
if (!useSaveFormat) {
result.append(
utility.printAtomName(targetVariable, mappingTask.getTargetProxy().isNested()));
} else {
result.append(
utility.printAtomNameForSaveFormat(
targetVariable, mappingTask.getTargetProxy().isNested()));
}
List<VariablePathExpression> attributePaths =
targetVariable.getFirstLevelAttributes(
mappingTask.getTargetProxy().getIntermediateSchema());
for (int j = 0; j < attributePaths.size(); j++) {
VariablePathExpression attributePath = attributePaths.get(j);
result.append(attributePath.getLastStep()).append(": ");
FormulaVariable attributeVariable =
findUniversalVariableForTargetPath(attributePath, universalVariables);
Expression transformation = null;
if (!constantTargetPaths.contains(attributePath)) {
if (attributeVariable == null) {
attributeVariable =
findExistentialVariable(
attributePath, tgd.getExistentialFormulaVariables(mappingTask));
}
transformation = attributeVariable.getTransformationFunction(attributePath);
}
if (transformation == null) {
if (!constantTargetPaths.contains(attributePath)) {
if (useSaveFormat) {
result.append("$");
}
result.append(attributeVariable.toShortString());
} else { // constant
result.append(constantValueMap.get(attributePath));
}
} else { // function
List<List<FormulaVariable>> variables = new ArrayList<List<FormulaVariable>>();
variables.add(tgd.getUniversalFormulaVariables(mappingTask));
utility.setVariableDescriptions(transformation, variables);
result.append(transformation);
}
if (j != attributePaths.size() - 1) {
result.append(", ");
}
}
result.append(")");
if (i != tgd.getTargetView().getGenerators().size() - 1) {
result.append(", \n");
}
}
return result.toString();
}