Examples of org.apache.openjpa.kernel.exps.Context

org.apache.openjpa.kernel.exps.Context
JPQL / Criteria Query Context @since 2.0

        return ctx().parsed.root;
    }


    private ClassMetaData getMetaDataForAlias(String alias) {
        for (int i = contexts.size() - 1; i >= 0; i--) {
            Context context =  contexts.get(i);
            if (alias.equalsIgnoreCase(context.schemaAlias))
                return context.meta;
        }


        return null;

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    protected void addVariableToContext(String id, Value var) {
        ctx().addVariable(id, var);
    }


    protected Value getVariable(String var) {
        Context c = ctx();
        Value v = c.getVariable(var);
        if (v != null)
            return v;
        if (c.getParent() != null)
            return c.getParent().findVariable(var);


        return null;
    }

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            // don't let the get alias methods see that a var has been set
            // until we get past the local table
            String var = this.var;
            this.var = null;
            Context ctx = context; 
            context = null; 


            int alias1 = _sel.getTableIndex(localTable, this, true);
            this.append(var);
            this.append(correlatedVar);

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            int subs, boolean inverse, boolean toMany, boolean outer) {
            // don't let the get alias methods see that a var has been set
            // until we get past the local table
            String var = this.var;
            this.var = null;
            Context ctx = context; 
            context = null; 


            // get first table alias before updating path; if there is a from
            // select then we shouldn't actually create a join object, since
            // the joins will all be done in the from select

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    }


    public static Context getThreadLocalContext(Context orig) {
        Context[] root = localContext.get();
        for (int i = 0; i < root.length; i++) {
            Context lctx = getThreadLocalContext(root[i], orig);
            if (lctx != null)
                return lctx;
        }
        return null;
    }

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    public static Select getThreadLocalSelect(Select select) {
        if (select == null)
            return null;
        Context[] lctx = JDBCStoreQuery.getThreadLocalContext();
        Context cloneFrom = select.ctx();
        for (int i = 0; i < lctx.length; i++) {
            Context cloneTo = getThreadLocalContext(lctx[i], cloneFrom);
            if (cloneTo != null)
                return (Select)cloneTo.getSelect();
        }
        return select;
    }

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        String alias = _schemaAlias;
        if (isPathInThisContext(pj) || table.isAssociation())          
            alias = null;


        // find the context where this alias is defined
        Context ctx = (alias != null) ?
            _ctx.findContext(alias) : null;
        if (ctx != null)
            sel = (SelectImpl) ctx.getSelect();


        if (!create) 
            i = sel.findAlias(table, key);  // find in parent and in myself
        else
            i = sel.getAlias(table, key); // find in myself
        if (i != null)
            return i;
        
        if (create) { // create here
            i = sel.createAlias(table, key);
        } else if (ctx != null && ctx != ctx()) { // create in other select
            i = ((SelectImpl)ctx.getSelect()).createAlias(table, key);
        }


        return i;
    }

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        return i;
    }


    private boolean isPathInThisContext(PathJoins pj) {
        // currCtx is set from Action, it is reset to null after the PCPath initialization
        Context currCtx = pj == null ? null : ((PathJoinsImpl)pj).context;
        
        // lastCtx is set to currCtx after the SelectJoins.join. pj.lastCtx and pj.path string are 
        // the last snapshot of pj. They will be used together for later table alias resolution in
        // the getColumnAlias(). 
        Context lastCtx = pj == null ? null : ((PathJoinsImpl)pj).lastContext;
        Context thisCtx = currCtx == null ? lastCtx : currCtx;
        String corrVar = pj == null ? null : pj.getCorrelatedVariable();
        
        return (pj != null && pj.path() != null && 
            (corrVar == null || (thisCtx != null && ctx() == thisCtx)));
    }

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     */
    public JPQLExpressionBuilder(ExpressionFactory factory,
        ExpressionStoreQuery query, Object parsedQuery) {
        super(factory, query.getResolver());


        contexts.push(new Context(parsedQuery instanceof ParsedJPQL
            ? (ParsedJPQL) parsedQuery
            : parsedQuery instanceof String
            ? getParsedQuery((String) parsedQuery)
            : null, null, null));

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        if (candidate == null && fmd.isElementCollection())
            candidate = fmd.getDefiningMetaData();


        setCandidate(candidate, alias);


        Context subContext = ctx();
        Subquery subquery = ctx().getSubquery();
        if (subquery == null){
            subquery = factory.newSubquery(candidate, true, alias);
            subContext.setSubquery(subquery);
        }
        else {
            subquery.setSubqAlias(alias);
        }

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Related Classes of org.apache.openjpa.kernel.exps.Context

org.apache.openjpa.jdbc.kernel.exps.PCPath

org.apache.openjpa.jdbc.kernel.exps.SelectConstructor

org.apache.openjpa.jdbc.kernel.JDBCStoreQuery

org.apache.openjpa.jdbc.sql.SelectImpl

org.apache.openjpa.jdbc.sql.SelectImpl$SelectJoins

org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder

org.apache.openjpa.persistence.criteria.CriteriaQueryImpl

org.apache.openjpa.persistence.criteria.RootImpl

org.apache.openjpa.persistence.criteria.SubqueryImpl

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