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1   /*
2    * Copyright 2004-2009 the Seasar Foundation and the Others.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
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,
13   * either express or implied. See the License for the specific language
14   * governing permissions and limitations under the License.
15   */
16  package org.seasar.cubby.tags;
17  
18  import static org.seasar.cubby.internal.util.LogMessages.format;
19  
20  import java.io.IOException;
21  import java.io.StringWriter;
22  
23  import javax.servlet.jsp.JspException;
24  import javax.servlet.jsp.tagext.SimpleTagSupport;
25  
26  /**
27   * パラメータを指定するためのカスタムタグです。
28   * 
29   * @author baba
30   */
31  public class ParamTag extends SimpleTagSupport {
32  
33  	/** パラメータ名。 */
34  	private String name;
35  
36  	/** 値。 */
37  	private String value;
38  
39  	/**
40  	 * パラメータ名を設定します。
41  	 * 
42  	 * @param name
43  	 *            パラメータ名
44  	 */
45  	public void setName(final String name) {
46  		this.name = name;
47  	}
48  
49  	/**
50  	 * 値を設定します。
51  	 * 
52  	 * @param value
53  	 *            値
54  	 */
55  	public void setValue(final String value) {
56  		this.value = value;
57  	}
58  
59  	/**
60  	 * {@inheritDoc}
61  	 */
62  	@Override
63  	public void doTag() throws JspException, IOException {
64  		final ParamParent parent = (ParamParent) findAncestorWithClass(this,
65  				ParamParent.class);
66  		if (parent == null) {
67  			throw new JspException(format("ECUB1004"));
68  		}
69  		final String value;
70  		if (this.value == null) {
71  			final StringWriter writer = new StringWriter();
72  			getJspBody().invoke(writer);
73  			value = writer.toString().trim();
74  		} else {
75  			value = this.value;
76  		}
77  		parent.addParameter(name, value);
78  	}
79  
80  }