Mercurial > hg > Members > sugi > MessagePack-java

comparison src/main/java/org/msgpack/template/builder/beans/Expression.java @ 0:cb825acd883a

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author sugi
date Sat, 18 Oct 2014 15:06:15 +0900
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-1:000000000000 0:cb825acd883a
1 // MODIFIED FOR THE MSGPACK PROJECT
2 // Licensed to the Apache Software Foundation (ASF) under one or more
3 // contributor license agreements. See the NOTICE file distributed with
4 // this work for additional information regarding copyright ownership.
5 // The ASF licenses this file to You under the Apache License, Version 2.0
6 // (the "License"); you may not use this file except in compliance with
7 // the License. You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
13 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
14 // License for the specific language governing permissions and limitations under
15 // the License.
16 //
17
18 package org.msgpack.template.builder.beans;
19
20 import org.apache.harmony.beans.BeansUtils;
21
22 public class Expression extends Statement {
23
24 boolean valueIsDefined = false;
25
26 Object value;
27
28 public Expression(Object value, Object target, String methodName,
29 Object[] arguments) {
30 super(target, methodName, arguments);
31 this.value = value;
32 this.valueIsDefined = true;
33 }
34
35 public Expression(Object target, String methodName, Object[] arguments) {
36 super(target, methodName, arguments);
37 this.value = null;
38 this.valueIsDefined = false;
39 }
40
41 @Override
42 public String toString() {
43 StringBuilder sb = new StringBuilder();
44 if (!valueIsDefined) {
45 sb.append("<unbound>"); //$NON-NLS-1$
46 } else {
47 if (value == null) {
48 sb.append(BeansUtils.NULL);
49 } else {
50 Class<?> clazz = value.getClass();
51 sb.append(clazz == String.class ? BeansUtils.QUOTE : BeansUtils
52 .idOfClass(clazz));
53 }
54 }
55 sb.append('=');
56 sb.append(super.toString());
57 return sb.toString();
58 }
59
60 public void setValue(Object value) {
61 this.value = value;
62 this.valueIsDefined = true;
63 }
64
65 public Object getValue() throws Exception {
66 if (!valueIsDefined) {
67 value = invokeMethod();
68 valueIsDefined = true;
69 }
70 return value;
71 }
72 }