01: /*
02: * Copyright 2004, 2005, 2006 Odysseus Software GmbH
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16: package de.odysseus.calyxo.forms.view;
17:
18: /**
19: * Group model interface.
20: * A group model contains information about
21: * what items/options should be rendered in a selected/checked state.
22: *
23: * @author Christoph Beck
24: */
25: public interface GroupModel {
26: /**
27: * Answer <code>true</code> iff the selection has been achieved from form data.
28: */
29: public boolean isSelectionAvailable();
30:
31: /**
32: * Answer <code>true</code> iff the selection is multiple
33: */
34: public boolean isMultiple();
35:
36: /**
37: * Answer <code>true</code> iff the specified key is selected.
38: */
39: public boolean isSelected(String key);
40:
41: /**
42: * Answer the number of keys in the selection.
43: */
44: public int getSelectedCount();
45: }
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