Package org.apache.openjpa.kernel.exps

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

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    /**
     * Populate a kernel expression tree by translating the components of this
     * receiver with the help of the given {@link ExpressionFactory}.
     */
    QueryExpressions getQueryExpressions(ExpressionFactory factory) {
        Context context = new Context(null, null, null);
        _contexts.get().push(context);
        try {
            return new CriteriaExpressionBuilder().getQueryExpressions(factory, this);
        }finally{
            _contexts.remove();
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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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                if (action.op == Action.GET_XPATH)
                    break;
            }
            prevaction = action;
            if (prevaction != null && prevaction.context != null) {
                Context jCtx = JDBCStoreQuery.getThreadLocalContext(prevaction.context);
                pstate.joins = pstate.joins.setJoinContext(jCtx);
            }
        }
        if (_varName != null)
            pstate.joins = pstate.joins.setVariable(_varName);
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    private String findSubqAlias(Select sel) {
        Select pSel = sel.getParent();
        if (pSel == null)
            return null;
        Context pCtx = pSel.ctx();
        if (pCtx.subquery == null)
            return null;
        if (pCtx.getSchema(_schemaAlias) != null)
            return ((SubQ)pCtx.subquery).getCandidateAlias();
        return findSubqAlias(pSel);
    }
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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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        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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            // 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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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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