Examples of org.eclipse.persistence.queries.JPAQueryBuilder

org.eclipse.persistence.queries.JPAQueryBuilder
This interface defines the entry point for implementing a JPQL query parsing system in EclipseLink.
By default, EclipseLink uses {@link ANTLRQueryBuilder} for parsing a queryand converting it into a {@link DatabaseQuery}.
Third-parties can implement this interface and provide a different JPQL parsing system if required. The {@link JPAQueryBuilder} implementing classcan be registered via a persistence unit property and the implementation class must have a public, zero-arg constructor. @version 2.4 @since 2.2 @author John Bracken @author Pascal Filion

        DatabaseQuery databaseQuery = null;
        if (isCacheable) {
            databaseQuery = (DatabaseQuery) session.getProject().getJPQLParseCache().get(jpqlQuery);
        }
        if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            databaseQuery = queryBuilder.buildQuery(jpqlQuery, session);
            
            // If the query uses fetch joins, need to use JPA default of not
            // filtering duplicates.
            if (databaseQuery.isReadAllQuery()) {
                ReadAllQuery readAllQuery = (ReadAllQuery) databaseQuery;

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        if (additionalCriteria != null) {
            if (getDescriptor().hasInheritance() && getDescriptor().getInheritancePolicy().hasView()) {
                throw DescriptorException.additionalCriteriaNotSupportedWithInheritanceViews(getDescriptor());
            }


            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            Expression selectionCriteria = queryBuilder.buildSelectionCriteria(
               getDescriptor().getAlias(),
               additionalCriteria,
               session
            );

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        if (queryBuilderClassName == null) {
            queryBuilderClassName = "org.eclipse.persistence.internal.jpa.jpql.HermesParser";
            //queryBuilderClassName = "org.eclipse.persistence.queries.ANTLRQueryBuilder";
        }
        String validation = (String)getProperty(PersistenceUnitProperties.JPQL_VALIDATION);
        JPAQueryBuilder builder = null;
        try {
            Class parserClass = null;
            // use class.forName() to avoid loading parser classes for JAXB
            // Use Class.forName not thread class loader to avoid class loader issues.
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
                try {
                    parserClass = (Class)AccessController.doPrivileged(new PrivilegedClassForName(queryBuilderClassName));
                } catch (PrivilegedActionException exception) {
                }
            } else {
                parserClass = PrivilegedAccessHelper.getClassForName(queryBuilderClassName);
            }
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
                try {
                    builder = (JPAQueryBuilder)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(parserClass));
                } catch (PrivilegedActionException exception) {
                }
            } else {
                builder = (JPAQueryBuilder)PrivilegedAccessHelper.newInstanceFromClass(parserClass);
            }
        } catch (Exception e) {
            throw new IllegalStateException("Could not load the JPQL parser class." /* TODO: Localize string */, e);
        }
        if (validation != null) {
            builder.setValidationLevel(validation);
        }
        return builder;
    }

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        if (additionalCriteria != null) {
            if (getDescriptor().hasInheritance() && getDescriptor().getInheritancePolicy().hasView()) {
                throw DescriptorException.additionalCriteriaNotSupportedWithInheritanceViews(getDescriptor());
            }


            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            Expression selectionCriteria = queryBuilder.buildSelectionCriteria(
               getDescriptor().getAlias(),
               additionalCriteria,
               session
            );

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        DatabaseQuery databaseQuery = null;
        if (isCacheable) {
            databaseQuery = (DatabaseQuery) session.getProject().getJPQLParseCache().get(jpqlQuery);
        }
        if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            databaseQuery = queryBuilder.buildQuery(jpqlQuery, session);
            
            // If the query uses fetch joins, need to use JPA default of not
            // filtering duplicates.
            if (databaseQuery.isReadAllQuery()) {
                ReadAllQuery readAllQuery = (ReadAllQuery) databaseQuery;

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        DatabaseQuery databaseQuery = null;
        if (isCacheable) {
            databaseQuery = (DatabaseQuery) session.getProject().getJPQLParseCache().get(jpqlQuery);
        }
        if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            databaseQuery = queryBuilder.buildQuery(jpqlQuery, session);
            
            // If the query uses fetch joins, need to use JPA default of not
            // filtering duplicates.
            if (databaseQuery.isReadAllQuery()) {
                ReadAllQuery readAllQuery = (ReadAllQuery) databaseQuery;

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        if (additionalCriteria != null) {
            if (getDescriptor().hasInheritance() && getDescriptor().getInheritancePolicy().hasView()) {
                throw DescriptorException.additionalCriteriaNotSupportedWithInheritanceViews(getDescriptor());
            }


            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            Expression selectionCriteria = queryBuilder.buildSelectionCriteria(
               getDescriptor().getAlias(),
               additionalCriteria,
               session
            );

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        if (queryBuilderClassName == null) {
            queryBuilderClassName = "org.eclipse.persistence.internal.jpa.jpql.HermesParser";
            //queryBuilderClassName = "org.eclipse.persistence.queries.ANTLRQueryBuilder";
        }
        String validation = (String)getProperty(PersistenceUnitProperties.JPQL_VALIDATION);
        JPAQueryBuilder builder = null;
        try {
            Class parserClass = null;
            // use class.forName() to avoid loading parser classes for JAXB
            // Use Class.forName not thread class loader to avoid class loader issues.
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
                try {
                    parserClass = (Class)AccessController.doPrivileged(new PrivilegedClassForName(queryBuilderClassName));
                } catch (PrivilegedActionException exception) {
                }
            } else {
                parserClass = PrivilegedAccessHelper.getClassForName(queryBuilderClassName);
            }
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()) {
                try {
                    builder = (JPAQueryBuilder)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(parserClass));
                } catch (PrivilegedActionException exception) {
                }
            } else {
                builder = (JPAQueryBuilder)PrivilegedAccessHelper.newInstanceFromClass(parserClass);
            }
        } catch (Exception e) {
            throw new IllegalStateException("Could not load the JPQL parser class." /* TODO: Localize string */, e);
        }
        if (validation != null) {
            builder.setValidationLevel(validation);
        }
        return builder;
    }

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        if (additionalCriteria != null) {
            if (getDescriptor().hasInheritance() && getDescriptor().getInheritancePolicy().hasView()) {
                throw DescriptorException.additionalCriteriaNotSupportedWithInheritanceViews(getDescriptor());
            }


            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            Expression selectionCriteria = queryBuilder.buildSelectionCriteria(
               getDescriptor().getAlias(),
               additionalCriteria,
               session
            );

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        DatabaseQuery databaseQuery = null;
        if (isCacheable) {
            databaseQuery = (DatabaseQuery) session.getProject().getJPQLParseCache().get(jpqlQuery);
        }
        if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
            JPAQueryBuilder queryBuilder = session.getQueryBuilder();
            databaseQuery = queryBuilder.buildQuery(jpqlQuery, session);
            
            // If the query uses fetch joins, need to use JPA default of not
            // filtering duplicates.
            if (databaseQuery.isReadAllQuery()) {
                ReadAllQuery readAllQuery = (ReadAllQuery) databaseQuery;

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org.eclipse.persistence.descriptors.DescriptorQueryManager

org.eclipse.persistence.internal.jpa.EJBQueryImpl

org.eclipse.persistence.internal.sessions.DatabaseSessionImpl

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