Examples of org.datanucleus.query.compiler.JavaQueryCompiler

org.datanucleus.query.compiler.JavaQueryCompiler
Typical implementation of a compiler for a java-based query language. The constructor takes in the components of the query, and the method compile() compiles it returning the compiled query, for use elsewhere.
Each "Expression" is effectively a tree of Expressions. You can navigate through each expression based on their type. For example, a DyadicExpression has a "left" and "right" and an operator between them. The left could also be a DyadicExpression, so you would navigate to its left/right components etc etc.

        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            startTime = System.currentTimeMillis();
            NucleusLogger.QUERY.debug(LOCALISER.msg("021044", getLanguage(), getSingleStringQuery()));
        }
        JavaQueryCompiler compiler = new JDOQLCompiler(ec.getMetaDataManager(), ec.getClassLoaderResolver(), 
            from, candidateClass, candidateCollection, 
            this.filter, getParsedImports(), this.ordering, this.result, this.grouping, this.having, 
            explicitParameters, explicitVariables, this.update);
        compilation = compiler.compile(parameterValues, subqueries);
        if (QueryUtils.queryReturnsSingleRow(this))
        {
            compilation.setReturnsSingleRow();
        }
        if (resultDistinct)

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                startTime = System.currentTimeMillis();
                NucleusLogger.QUERY.debug(LOCALISER.msg("021044", getLanguage(), 
                    ((AbstractJDOQLQuery)subquery).getSingleStringQuery()));
            }


            JavaQueryCompiler subCompiler = new JDOQLCompiler(ec.getMetaDataManager(), ec.getClassLoaderResolver(),
                subquery.from, subquery.candidateClass, null,
                subquery.filter, getParsedImports(), subquery.ordering, subquery.result, 
                subquery.grouping, subquery.having, subquery.explicitParameters, null, null);
            subCompiler.setLinkToParentQuery(parentCompiler, subqueryDefinition.getParameterMap());
            QueryCompilation subqueryCompilation = subCompiler.compile(parameterValues, null);
            if (QueryUtils.queryReturnsSingleRow(subquery))
            {
                subqueryCompilation.setReturnsSingleRow();
            }
            parentCompilation.addSubqueryCompilation(entry.getKey(), subqueryCompilation);

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        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            startTime = System.currentTimeMillis();
            NucleusLogger.QUERY.debug(LOCALISER.msg("021044", getLanguage(), getSingleStringQuery()));
        }
        JavaQueryCompiler compiler = new JPQLCompiler(ec.getMetaDataManager(), ec.getClassLoaderResolver(), 
            from, candidateClass, candidateCollection, 
            this.filter, getParsedImports(), this.ordering, this.result, this.grouping, this.having, 
            explicitParameters, update);
        compilation = compiler.compile(parameterValues, subqueries);
        if (QueryUtils.queryReturnsSingleRow(this))
        {
            compilation.setReturnsSingleRow();
        }
        if (resultDistinct)

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                startTime = System.currentTimeMillis();
                NucleusLogger.QUERY.debug(LOCALISER.msg("021044", getLanguage(), 
                    ((AbstractJPQLQuery)subquery).getSingleStringQuery()));
            }


            JavaQueryCompiler subCompiler = new JPQLCompiler(ec.getMetaDataManager(), ec.getClassLoaderResolver(),
                subquery.from, subquery.candidateClass, null,
                subquery.filter, getParsedImports(), subquery.ordering, subquery.result, 
                subquery.grouping, subquery.having, null, null);
            subCompiler.setLinkToParentQuery(parentCompiler, null);
            QueryCompilation subqueryCompilation = subCompiler.compile(parameterValues, subquery.subqueries);
            parentCompilation.addSubqueryCompilation(entry.getKey(), subqueryCompilation);
            if (NucleusLogger.QUERY.isDebugEnabled())
            {
                NucleusLogger.QUERY.debug(LOCALISER.msg("021045", getLanguage(), 
                    "" + (System.currentTimeMillis() - startTime)));

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        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            startTime = System.currentTimeMillis();
            NucleusLogger.QUERY.debug(LOCALISER.msg("021044", "JDOQL", getSingleStringQuery()));
        }
        JavaQueryCompiler compiler = new JDOQLCompiler(om.getMetaDataManager(), om.getClassLoaderResolver(), 
            null, candidateClass, candidateCollection, 
            this.filter, getParsedImports(), this.ordering, this.result, this.grouping, this.having, 
            explicitParameters, explicitVariables);
        compilation = compiler.compile(parameterValues, subqueries);
        if (QueryUtils.queryReturnsSingleRow(this))
        {
            compilation.setReturnsSingleRow();
        }
        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            NucleusLogger.QUERY.debug(LOCALISER.msg("021045", "JDOQL", 
                "" + (System.currentTimeMillis() - startTime)));
        }


        if (subqueries != null)
        {
            // Compile any subqueries
            Iterator iter = subqueries.entrySet().iterator();
            while (iter.hasNext())
            {
                Map.Entry entry = (Map.Entry)iter.next();
                SubqueryDefinition subqueryDefinition = (SubqueryDefinition)entry.getValue();
                Query subquery = subqueryDefinition.getQuery();
                if (NucleusLogger.QUERY.isDebugEnabled())
                {
                    startTime = System.currentTimeMillis();
                    NucleusLogger.QUERY.debug(LOCALISER.msg("021044", "JDOQL", 
                        ((AbstractJDOQLQuery)subquery).getSingleStringQuery()));
                }
                compiler = new JDOQLCompiler(om.getMetaDataManager(), om.getClassLoaderResolver(),
                    null, subquery.candidateClass, null,
                    subquery.filter, getParsedImports(), subquery.ordering, subquery.result, 
                    subquery.grouping, subquery.having, null, null);
                QueryCompilation subqueryCompilation = compiler.compile(parameterValues, null);
                if (QueryUtils.queryReturnsSingleRow(subquery))
                {
                    subqueryCompilation.setReturnsSingleRow();
                }
                compilation.addSubqueryCompilation((String)entry.getKey(), subqueryCompilation);

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        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            startTime = System.currentTimeMillis();
            NucleusLogger.QUERY.debug(LOCALISER.msg("021044", "JPQL", getSingleStringQuery()));
        }
        JavaQueryCompiler compiler = new JPQLCompiler(om.getMetaDataManager(), om.getClassLoaderResolver(), 
            from, candidateClass, candidateCollection, 
            this.filter, getParsedImports(), this.ordering, this.result, this.grouping, this.having, 
            explicitParameters, update);
        compilation = compiler.compile(parameterValues, subqueries);
        if (QueryUtils.queryReturnsSingleRow(this))
        {
            compilation.setReturnsSingleRow();
        }
        if (compilation.getExprResult() == null)
        {
            // If the result was "Object(e)" or "e" then this is meaningless so remove
            result = null;
        }
        if (NucleusLogger.QUERY.isDebugEnabled())
        {
            NucleusLogger.QUERY.debug(LOCALISER.msg("021045", "JPQL", 
                "" + (System.currentTimeMillis() - startTime)));
        }


        if (subqueries != null)
        {
            // Compile any subqueries
            Iterator iter = subqueries.entrySet().iterator();
            while (iter.hasNext())
            {
                Map.Entry entry = (Map.Entry)iter.next();
                SubqueryDefinition subqueryDefinition = (SubqueryDefinition)entry.getValue();
                Query subquery = subqueryDefinition.getQuery();
                if (NucleusLogger.QUERY.isDebugEnabled())
                {
                    startTime = System.currentTimeMillis();
                    NucleusLogger.QUERY.debug(LOCALISER.msg("021044", "JPQL", 
                        ((AbstractJPQLQuery)subquery).getSingleStringQuery()));
                }
                compiler = new JPQLCompiler(om.getMetaDataManager(), om.getClassLoaderResolver(),
                    subquery.from, subquery.candidateClass, null,
                    subquery.filter, getParsedImports(), subquery.ordering, subquery.result, 
                    subquery.grouping, subquery.having, null, null);
                QueryCompilation subqueryCompilation = compiler.compile(parameterValues, null);
                compilation.addSubqueryCompilation((String)entry.getKey(), subqueryCompilation);
                if (NucleusLogger.QUERY.isDebugEnabled())
                {
                    NucleusLogger.QUERY.debug(LOCALISER.msg("021045", "JPQL", 
                        "" + (System.currentTimeMillis() - startTime)));

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Related Classes of org.datanucleus.query.compiler.JavaQueryCompiler

org.datanucleus.metadata.AbstractClassMetaData

org.datanucleus.metadata.AbstractMemberMetaData

org.datanucleus.query.expression.Expression

org.datanucleus.query.expression.ExpressionCompiler

org.datanucleus.query.expression.Literal

org.datanucleus.query.node.Node

org.datanucleus.query.symbol.PropertySymbol

org.datanucleus.query.symbol.Symbol

org.datanucleus.store.query.AbstractJDOQLQuery

org.datanucleus.store.query.AbstractJPQLQuery

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