Examples with JForLoop com.sun.codemodel.JForLoop used on opensource projects

Example 1 with JForLoop

use of com.sun.codemodel.JForLoop in project drill by apache.

the class DrillAggFuncHolder method renderStart.

@Override
public JVar[] renderStart(ClassGenerator<?> g, HoldingContainer[] inputVariables) {
    if (!g.getMappingSet().isHashAggMapping()) {
        //Declare workspace vars for non-hash-aggregation.
        JVar[] workspaceJVars = declareWorkspaceVariables(g);
        generateBody(g, BlockType.SETUP, setup(), null, workspaceJVars, true);
        return workspaceJVars;
    } else {
        //Declare workspace vars and workspace vectors for hash aggregation.
        JVar[] workspaceJVars = declareWorkspaceVectors(g);
        JBlock setupBlock = g.getSetupBlock();
        //Loop through all workspace vectors, to get the minimum of size of all workspace vectors.
        JVar sizeVar = setupBlock.decl(g.getModel().INT, "vectorSize", JExpr.lit(Integer.MAX_VALUE));
        JClass mathClass = g.getModel().ref(Math.class);
        for (int id = 0; id < getWorkspaceVars().length; id++) {
            if (!getWorkspaceVars()[id].isInject()) {
                setupBlock.assign(sizeVar, mathClass.staticInvoke("min").arg(sizeVar).arg(g.getWorkspaceVectors().get(getWorkspaceVars()[id]).invoke("getValueCapacity")));
            }
        }
        for (int i = 0; i < getWorkspaceVars().length; i++) {
            if (!getWorkspaceVars()[i].isInject()) {
                setupBlock.assign(workspaceJVars[i], JExpr._new(g.getHolderType(getWorkspaceVars()[i].getMajorType())));
            }
        }
        //Use for loop to initialize entries in the workspace vectors.
        JForLoop forLoop = setupBlock._for();
        JVar ivar = forLoop.init(g.getModel().INT, "drill_internal_i", JExpr.lit(0));
        forLoop.test(ivar.lt(sizeVar));
        forLoop.update(ivar.assignPlus(JExpr.lit(1)));
        JBlock subBlock = generateInitWorkspaceBlockHA(g, BlockType.SETUP, setup(), workspaceJVars, ivar);
        forLoop.body().add(subBlock);
        return workspaceJVars;
    }
}