Examples of org.apache.ojb.jdo.jdoql.QueryTreeResolver

org.apache.ojb.jdo.jdoql.QueryTreeResolver

Resolves and checks the query trees. This involves the following things:

Replace {@link NameExpression NameExpression} with {@link LocalVariableAccess VariableAccess}, {@link FieldAccess FieldAccess}, or {@link TypeAccess TypeAccess}
Resolve types referenced by {@link Type Type} and {@link TypeAccess TypeAccess}
Resolve features/variables referenced by {@link LocalVariableAccess VariableAccess}, {@link FieldAccess FieldAccess}, and {@link MethodInvocation MethodInvocation}
Check that expression types are valid, e.g. that the types of the two sides of a binary expression are compatible to each other and that this binary operator can be applied to them
Check that the accessed methods are allowed to be accessed as per JDO spec (or extensions allowed by OJB)
Check that for each accessed variable there is a variable or parameter defined
Check that each accessed field is persistent

    public void compile()
    {
        if (_needsCompilation)
        {
            // first we resolve this query 
            new QueryTreeResolver().resolveAndCheck(this);
            // TODO: next the filter and ordering expressions are enhanced with
            //       actual database queries, e.g. like this:
            // new QueryCompiler().compile(this);
            //       which adds ojb queries to the filter expressions
            //       (including the ordering)

    public void compile()
    {
        if (_needsCompilation)
        {
            // first we resolve this query 
            new QueryTreeResolver().resolveAndCheck(this);
            // TODO: next the filter and ordering expressions are enhanced with
            //       actual database queries, e.g. like this:
            // new QueryCompiler().compile(this);
            //       which adds ojb queries to the filter expressions
            //       (including the ordering)

Examples of org.apache.ojb.jdo.jdoql.QueryTreeResolver

Related Classes of org.apache.ojb.jdo.jdoql.QueryTreeResolver