/**
* This prepares the package builder, loads the jars/classpath.
*
* @return true if everything is good to go, false if its all gone horribly wrong, and we can't
* even get the package header up.
*/
private boolean preparePackage() {
// firstly we loadup the classpath
builder.addPackage(new PackageDescr(pkg.getName()));
// now we deal with the header (imports, templates, globals).
addDrl(ServiceImplementation.getDroolsHeader(pkg));
loadDeclaredTypes();
if (builder.hasErrors()) {
recordBuilderErrors(pkg);
// if we have any failures, lets drop out now, no point in going
// any further
return false;
}
loadDSLFiles();
// finally, any functions we will load at this point.
AssetItemIterator it = this.pkg.listAssetsByFormat(new String[] {AssetFormats.FUNCTION});
while (it.hasNext()) {
AssetItem func = (AssetItem) it.next();
addDrl(func.getContent());
if (builder.hasErrors()) {
recordBuilderErrors(func);
builder.clearErrors();
}
}
return errors.size() == 0;
}
private void loadDSLFiles() {
// now we load up the DSL files
builder.setDSLFiles(
BRMSPackageBuilder.getDSLMappingFiles(
pkg,
new BRMSPackageBuilder.DSLErrorEvent() {
public void recordError(AssetItem asset, String message) {
errors.add(new ContentAssemblyError(asset, message));
}
}));
}
/** Builds assets that are "rule" assets (ie things that are not functions etc). */
private void buildAsset(AssetItem asset) {
ContentHandler h = ContentManager.getHandler(asset.getFormat());
if (h instanceof IRuleAsset) {
try {
((IRuleAsset) h).compile(builder, asset, new ErrorLogger());
if (builder.hasErrors()) {
this.recordBuilderErrors(asset);
// clear the errors, so we don't double report.
builder.clearErrors();
}
} catch (DroolsParserException e) {
throw new RulesRepositoryException(e);
} catch (IOException e) {
throw new RulesRepositoryException(e);
}
}
}
public String getDRL() {
StringBuffer src = new StringBuffer();
src.append("package " + this.pkg.getName() + "\n");
src.append(ServiceImplementation.getDroolsHeader(this.pkg) + "\n\n");
// now we load up the DSL files
builder.setDSLFiles(
BRMSPackageBuilder.getDSLMappingFiles(
pkg,
new BRMSPackageBuilder.DSLErrorEvent() {
public void recordError(AssetItem asset, String message) {
errors.add(new ContentAssemblyError(asset, message));
}
}));
// do the functions and declared types.
AssetItemIterator it =
this.pkg.listAssetsByFormat(new String[] {AssetFormats.FUNCTION, AssetFormats.DRL_MODEL});
while (it.hasNext()) {
AssetItem func = (AssetItem) it.next();
if (!func.isArchived()) {
src.append(func.getContent() + "\n\n");
}
}
// now the rules
Iterator iter = pkg.getAssets();
while (iter.hasNext()) {
AssetItem asset = (AssetItem) iter.next();
if (!asset.isArchived()) {
ContentHandler h = ContentManager.getHandler(asset.getFormat());
if (h instanceof IRuleAsset) {
IRuleAsset ruleAsset = (IRuleAsset) h;
ruleAsset.assembleDRL(builder, asset, src);
}
src.append("\n\n");
}
}
return src.toString();
}
private void addDrl(String drl) {
if ("".equals(drl)) {
return;
}
try {
builder.addPackageFromDrl(new StringReader(drl));
} catch (DroolsParserException e) {
throw new RulesRepositoryException("Unexpected error when parsing package.", e);
} catch (IOException e) {
throw new RulesRepositoryException("IO Exception occurred when parsing package.", e);
}
}
private void loadDeclaredTypes() {
AssetItemIterator it = this.pkg.listAssetsByFormat(new String[] {AssetFormats.DRL_MODEL});
while (it.hasNext()) {
AssetItem as = it.next();
try {
builder.addPackageFromDrl(new StringReader(as.getContent()));
} catch (DroolsParserException e) {
this.errors.add(new ContentAssemblyError(as, "Parser exception: " + e.getMessage()));
} catch (IOException e) {
this.errors.add(new ContentAssemblyError(as, "IOException: " + e.getMessage()));
}
}
}
public void createBuilder() {
List<JarInputStream> jars = BRMSPackageBuilder.getJars(pkg);
builder = BRMSPackageBuilder.getInstance(jars);
}
/** I've got a package people ! */
public Package getBinaryPackage() {
if (this.hasErrors()) {
throw new IllegalStateException("There is no package available, as there were errors.");
}
return builder.getPackage();
}
/** This will accumulate the errors. */
private void recordBuilderErrors(VersionableItem asset) {
DroolsError[] errs = builder.getErrors().getErrors();
for (int i = 0; i < errs.length; i++) {
this.errors.add(new ContentAssemblyError(asset, errs[i].getMessage()));
}
}