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