pebie

Hello all, I want to store my report definitions in a database with access for multiple users. There will be concurrent access (upload/update, compilation, run, delete) to the report definitions. To ensure consistency between main- and subreports locking/allocation/copying of reportdefinitions to the beginning of the report generation is neccessary to avoid inconsistencies/locks. So i need to determine, which reports are used by the main report. I want to put the used JasperReport objects to a hash associated to the current reporting run to avoid them to change. As i don`t want to write my own parser, i tried to overload JRVerifier/verifySubreport (see 4). Too bad that this method is private. Is there a deeper reason not to declare it protected ? Or is there a recommended way to find out my specific subreport references ? (i have tried to use a manipulated JRXmlWriter. It works, but uses a lot of space and time to get rid of the written xml) Thanx in advance, pebie PS: i have posted this in 'Discussion/Help'. Does anyone know how to delete an unintentionally sent item ? -------------- (1)The snippet from the referencing main.jrxml <subreport isUsingCache="true"> <reportElement x="168" y="7" width="350" height="31" key="subreport-1"/> <connectionExpression> <![CDATA[$P{REPORT_CONNECTION}]]> </connectionExpression> <subreportExpression class="net.sf.jasperreports.engine.JasperReport"> <![CDATA[subReportResolver.getReport("subsubsub")]]> </subreportExpression> </subreport> ------------- (2)The Subreport Resolver public class SubReportResolver { // stub implementation for testing with iReport public static JasperReport getReport(String name) throws JRException{ String basePath="......resourcesjasper"; String ext=".jrxml"; System.out.println("Compiling "+name); return MyCompileManager.compileReport(basePath+name+ext); } } -------------- (3)Overloaded Compiler Manager public class MyCompileManager extends JasperCompileManager { public static JasperReport compileReport(String sourceFileName) throws JRException { JasperDesign jasperDesign = JRXmlLoader.load(sourceFileName); // c should contain accessed JasperReport objects (and maybe errors of cause) Collection c = MyVerifier.verifyDesign(jasperDesign); return compileReport(jasperDesign); } } -------------- (4)Overloaded Verifier public class MyVerifier extends JRVerifier { protected MyVerifier(JasperDesign jrDesign, JRExpressionCollector expressionCollector) { super(jrDesign,expressionCollector); } public static Collection verifyDesign(JasperDesign jasperDesign, JRExpressionCollector expressionCollector) { // copied from base class MyVerifier verifier = new MyVerifier(jasperDesign, expressionCollector); return verifier.verifyDesign(); } private void verifySubreport(JRSubreport subreport) { // access subreport and put it to a save haven // subreport.getExpression().getText() matches SubReportResolver System.out.println("Verifiying "+subreport.toString()); } }

Hello all, I want to store my report definitions in a database with access for multiple users. There will be concurrent access (upload/update, compilation, run, delete) to the report definitions. To ensure consistency between main- and subreports locking/allocation/copying of reportdefinitions to the beginning of the report generation is neccessary to avoid inconsistencies/locks. So i need to determine, which reports are used by the main report. I want to put the used JasperReport objects to a hash associated to the current reporting run to avoid them to change. As i don`t want to write my own parser, i tried to overload JRVerifier/verifySubreport (see 4). Too bad that this method is private. Is there a deeper reason not to declare it protected ? Or is there a recommended way to find out my specific subreport references ? (i have tried to use a manipulated JRXmlWriter. It works, but uses a lot of space and time to get rid of the written xml) Thanx in advance, pebie -------------- (1)The snippet from the referencing main.jrxml <subreport isUsingCache="true"> <reportElement x="168" y="7" width="350" height="31" key="subreport-1"/> <connectionExpression> <![CDATA[$P{REPORT_CONNECTION}]]> </connectionExpression> <subreportExpression class="net.sf.jasperreports.engine.JasperReport"> <![CDATA[subReportResolver.getReport("subsubsub")]]> </subreportExpression> </subreport> ------------- (2)The Subreport Resolver public class SubReportResolver { // stub implementation for testing with iReport public static JasperReport getReport(String name) throws JRException{ String basePath="......\resources\jasper\"; String ext=".jrxml"; System.out.println("Compiling "+name); return MyCompileManager.compileReport(basePath+name+ext); } } -------------- (3)Overloaded Compiler Manager public class MyCompileManager extends JasperCompileManager { public static JasperReport compileReport(String sourceFileName) throws JRException { JasperDesign jasperDesign = JRXmlLoader.load(sourceFileName); // c should contain accessed JasperReport objects (and maybe errors of cause) Collection c = MyVerifier.verifyDesign(jasperDesign); return compileReport(jasperDesign); } } -------------- (4)Overloaded Verifier public class MyVerifier extends JRVerifier { protected MyVerifier(JasperDesign jrDesign, JRExpressionCollector expressionCollector) { super(jrDesign,expressionCollector); } public static Collection verifyDesign(JasperDesign jasperDesign, JRExpressionCollector expressionCollector) { // copied from base class MyVerifier verifier = new MyVerifier(jasperDesign, expressionCollector); return verifier.verifyDesign(); } private void verifySubreport(JRSubreport subreport) { // access subreport and put it to a save haven // subreport.getExpression().getText() matches SubReportResolver System.out.println("Verifiying "+subreport.toString()); } }