01: /*
02: * Copyright 2006, 2007 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.el.tree.impl.ast;
17:
18: import java.util.List;
19:
20: import javax.el.ELContext;
21:
22: import de.odysseus.el.misc.TypeConversions;
23: import de.odysseus.el.tree.Bindings;
24:
25: public final class AstComposite extends AstRightValue {
26: private final List<AstNode> nodes;
27:
28: public AstComposite(List<AstNode> nodes) {
29: this .nodes = nodes;
30: }
31:
32: @Override
33: public Object eval(Bindings bindings, ELContext context) {
34: StringBuilder b = new StringBuilder(16);
35: for (int i = 0; i < getCardinality(); i++) {
36: b.append(TypeConversions.coerceToString(nodes.get(i).eval(
37: bindings, context)));
38: }
39: return b.toString();
40: }
41:
42: @Override
43: public String toString() {
44: return "composite";
45: }
46:
47: @Override
48: public void appendStructure(StringBuilder b, Bindings bindings) {
49: for (int i = 0; i < getCardinality(); i++) {
50: nodes.get(i).appendStructure(b, bindings);
51: }
52: }
53:
54: public int getCardinality() {
55: return nodes.size();
56: }
57:
58: public AstNode getChild(int i) {
59: return nodes.get(i);
60: }
61: }
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