Examples with InputFlowAnalyzer org.eclipse.jdt.ls.core.internal.corext.refactoring.code.flow.InputFlowAnalyzer used on opensource projects

Example 1 with InputFlowAnalyzer

use of org.eclipse.jdt.ls.core.internal.corext.refactoring.code.flow.InputFlowAnalyzer in project eclipse.jdt.ls by eclipse.

the class ExtractMethodAnalyzer method computeOutput.

private void computeOutput(RefactoringStatus status) {
    // First find all writes inside the selection.
    FlowContext flowContext = new FlowContext(0, fMaxVariableId + 1);
    flowContext.setConsiderAccessMode(true);
    flowContext.setComputeMode(FlowContext.RETURN_VALUES);
    FlowInfo returnInfo = new InOutFlowAnalyzer(flowContext).perform(getSelectedNodes());
    IVariableBinding[] returnValues = returnInfo.get(flowContext, FlowInfo.WRITE | FlowInfo.WRITE_POTENTIAL | FlowInfo.UNKNOWN);
    // Compute a selection that exactly covers the selected nodes
    Selection selection = getSelectedNodeRange();
    List<IVariableBinding> localReads = new ArrayList<>();
    flowContext.setComputeMode(FlowContext.ARGUMENTS);
    FlowInfo argInfo = new InputFlowAnalyzer(flowContext, selection, true).perform(fEnclosingBodyDeclaration);
    IVariableBinding[] reads = argInfo.get(flowContext, FlowInfo.READ | FlowInfo.READ_POTENTIAL | FlowInfo.UNKNOWN);
    outer: for (int i = 0; i < returnValues.length && localReads.size() < returnValues.length; i++) {
        IVariableBinding binding = returnValues[i];
        for (int x = 0; x < reads.length; x++) {
            if (reads[x] == binding) {
                localReads.add(binding);
                fReturnValue = binding;
                continue outer;
            }
        }
    }
    switch(localReads.size()) {
        case 0:
            fReturnValue = null;
            break;
        case 1:
            break;
        default:
            fReturnValue = null;
            StringBuffer affectedLocals = new StringBuffer();
            for (int i = 0; i < localReads.size(); i++) {
                IVariableBinding binding = localReads.get(i);
                String bindingName = BindingLabelProvider.getBindingLabel(binding, BindingLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.F_PRE_TYPE_SIGNATURE);
                affectedLocals.append(bindingName);
                if (i != localReads.size() - 1) {
                    affectedLocals.append('\n');
                }
            }
            String message = MessageFormat.format(RefactoringCoreMessages.ExtractMethodAnalyzer_assignments_to_local, new Object[] { affectedLocals.toString() });
            status.addFatalError(message, JavaStatusContext.create(fCUnit, getSelection()));
            return;
    }
    List<IVariableBinding> callerLocals = new ArrayList<>(5);
    FlowInfo localInfo = new InputFlowAnalyzer(flowContext, selection, false).perform(fEnclosingBodyDeclaration);
    IVariableBinding[] writes = localInfo.get(flowContext, FlowInfo.WRITE | FlowInfo.WRITE_POTENTIAL | FlowInfo.UNKNOWN);
    for (int i = 0; i < writes.length; i++) {
        IVariableBinding write = writes[i];
        if (getSelection().covers(ASTNodes.findDeclaration(write, fEnclosingBodyDeclaration))) {
            callerLocals.add(write);
        }
    }
    fCallerLocals = callerLocals.toArray(new IVariableBinding[callerLocals.size()]);
    if (fReturnValue != null && getSelection().covers(ASTNodes.findDeclaration(fReturnValue, fEnclosingBodyDeclaration))) {
        fReturnLocal = fReturnValue;
    }
}