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1
11 package org.eclipse.jdt.internal.ui.actions;
12
13 import java.util.ArrayList  ;
14 import java.util.List ;
15
16 import org.eclipse.core.runtime.IStatus;
17
18 import org.eclipse.ui.dialogs.ISelectionStatusValidator;
19
20 import org.eclipse.jdt.core.dom.IMethodBinding;
21 import org.eclipse.jdt.core.dom.ITypeBinding;
22 import org.eclipse.jdt.core.dom.IVariableBinding;
23
24 import org.eclipse.jdt.internal.corext.util.Messages;
25
26 import org.eclipse.jdt.internal.ui.dialogs.StatusInfo;
27
28 public class GenerateConstructorUsingFieldsValidator implements ISelectionStatusValidator {
29
30 private GenerateConstructorUsingFieldsSelectionDialog fDialog;
31
32 private final int fEntries;
33
34 private List fSignatures;
35
36 private ITypeBinding fType= null;
37
38 public GenerateConstructorUsingFieldsValidator(GenerateConstructorUsingFieldsSelectionDialog dialog, ITypeBinding type, int entries) {
39 fEntries= entries;
40 fDialog= dialog;
41 fType= type;
42 fSignatures= getExistingConstructorSignatures();
43 }
44
45 public GenerateConstructorUsingFieldsValidator(int entries) {
46 fEntries= entries;
47 fType= null;
48 }
49
50 private int countSelectedFields(Object [] selection) {
51 int count= 0;
52 for (int index= 0; index < selection.length; index++) {
53 if (selection[index] instanceof IVariableBinding)
54 count++;
55 }
56 return count;
57 }
58
59 private void createSignature(final IMethodBinding constructor, StringBuffer buffer, Object [] selection) {
60 ITypeBinding types[]= constructor.getParameterTypes();
61 for (int index= 0; index < types.length; index++)
62 buffer.append(types[index].getName());
63 if (selection != null) {
64 for (int index= 0; index < selection.length; index++)
65 if (selection[index] instanceof IVariableBinding)
66 buffer.append(((IVariableBinding) selection[index]).getType().getErasure().getName());
67 }
68 }
69
70 private List getExistingConstructorSignatures() {
71 List existing= new ArrayList ();
72 IMethodBinding[] methods= fType.getDeclaredMethods();
73 for (int index= 0; index < methods.length; index++) {
74 if (methods[index].isConstructor()) {
75 StringBuffer buffer= new StringBuffer ();
76 createSignature(methods[index], buffer, null);
77 existing.add(buffer.toString());
78 }
79 }
80 return existing;
81 }
82
83 public IStatus validate(Object [] selection) {
84 StringBuffer buffer= new StringBuffer ();
85 final IMethodBinding constructor= fDialog.getSuperConstructorChoice();
86 createSignature(constructor, buffer, selection);
87 if (fSignatures.contains(buffer.toString()))
88 return new StatusInfo(IStatus.WARNING, ActionMessages.GenerateConstructorUsingFieldsAction_error_duplicate_constructor);
89 return new StatusInfo(IStatus.INFO, Messages.format(ActionMessages.GenerateConstructorUsingFieldsAction_fields_selected, new Object [] { String.valueOf(countSelectedFields(selection)), String.valueOf(fEntries)}));
90 }
91 }
92 |
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