#1164

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Build # #1164

Build Type

Pull #189

github

Committed by

web-flow

Commit Message

Merge e930cb29c into 34bbfca66

Pull Request Pull Request #189: Update dependency org.mybatis:mybatis-parent to v38

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/src/main/java/org/mybatis/scripting/thymeleaf/processor/MyBatisBindTagProcessor.java

/*
 *    Copyright 2018-2022 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       https://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.scripting.thymeleaf.processor;

import java.util.List;
import java.util.Objects;

import org.mybatis.scripting.thymeleaf.MyBatisBindingContext;
import org.thymeleaf.context.ITemplateContext;
import org.thymeleaf.engine.AttributeName;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.model.IProcessableElementTag;
import org.thymeleaf.processor.element.AbstractAttributeTagProcessor;
import org.thymeleaf.processor.element.IElementTagStructureHandler;
import org.thymeleaf.standard.expression.Assignation;
import org.thymeleaf.standard.expression.AssignationSequence;
import org.thymeleaf.standard.expression.AssignationUtils;
import org.thymeleaf.standard.expression.IStandardExpression;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.util.StringUtils;

/**
 * The processor class for handling the {@code mybatis:bind} tag. <br>
 * This processor register an any value to the MyBatis’s bind variables (similar to that of the {@code <bind>} provided
 * by MyBatis core module) This class's implementation was inspired with the {@code StandardWithTagProcessor} provide by
 * Thymeleaf.
 *
 * @author Kazuki Shimizu
 *
 * @version 1.0.0
 *
 * @see org.thymeleaf.standard.processor.StandardWithTagProcessor
 */
public class MyBatisBindTagProcessor extends AbstractAttributeTagProcessor {

  private static final int PRECEDENCE = 600;
  private static final String ATTR_NAME = "bind";

  /**
   * Constructor that can be specified the template mode and dialect prefix.
   *
   * @param templateMode
   *          A target template mode
   * @param prefix
   *          A target dialect prefix
   */
  public MyBatisBindTagProcessor(final TemplateMode templateMode, final String prefix) {
    super(templateMode, prefix, null, false, ATTR_NAME, true, PRECEDENCE, true);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName,
      String attributeValue, IElementTagStructureHandler structureHandler) {
    AssignationSequence assignations = AssignationUtils.parseAssignationSequence(context, attributeValue, false);

    List<Assignation> assignationValues = assignations.getAssignations();
    assignationValues.forEach(assignation -> {
      IStandardExpression nameExp = assignation.getLeft();
      Object name = nameExp.execute(context);
      IStandardExpression valueExp = assignation.getRight();
      Object value = valueExp.execute(context);

      if (Objects.isNull(name) || StringUtils.isEmpty(name.toString())) {
        throw new TemplateProcessingException(
            "Variable name expression evaluated as null or empty: \"" + nameExp + "\"");
      }

      MyBatisBindingContext bindingContext = MyBatisBindingContext.load(context);
      bindingContext.setCustomBindVariable(name.toString(), value);
    });
  }

}

1	/*
2	* Copyright 2018-2022 the original author or authors.
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	* https://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, either express or implied.
13	* See the License for the specific language governing permissions and
14	* limitations under the License.
15	*/
16	package org.mybatis.scripting.thymeleaf.processor;
17
18	import java.util.List;
19	import java.util.Objects;
20
21	import org.mybatis.scripting.thymeleaf.MyBatisBindingContext;
22	import org.thymeleaf.context.ITemplateContext;
23	import org.thymeleaf.engine.AttributeName;
24	import org.thymeleaf.exceptions.TemplateProcessingException;
25	import org.thymeleaf.model.IProcessableElementTag;
26	import org.thymeleaf.processor.element.AbstractAttributeTagProcessor;
27	import org.thymeleaf.processor.element.IElementTagStructureHandler;
28	import org.thymeleaf.standard.expression.Assignation;
29	import org.thymeleaf.standard.expression.AssignationSequence;
30	import org.thymeleaf.standard.expression.AssignationUtils;
31	import org.thymeleaf.standard.expression.IStandardExpression;
32	import org.thymeleaf.templatemode.TemplateMode;
33	import org.thymeleaf.util.StringUtils;
34
35	/**
36	* The processor class for handling the {@code mybatis:bind} tag. <br>
37	* This processor register an any value to the MyBatis’s bind variables (similar to that of the {@code <bind>} provided
38	* by MyBatis core module) This class's implementation was inspired with the {@code StandardWithTagProcessor} provide by
39	* Thymeleaf.
40	*
41	* @author Kazuki Shimizu
42	*
43	* @version 1.0.0
44	*
45	* @see org.thymeleaf.standard.processor.StandardWithTagProcessor
46	*/
47	public class MyBatisBindTagProcessor extends AbstractAttributeTagProcessor {
48
49	private static final int PRECEDENCE = 600;
50	private static final String ATTR_NAME = "bind";
51
52	/**
53	* Constructor that can be specified the template mode and dialect prefix.
54	*
55	* @param templateMode
56	* A target template mode
57	* @param prefix
58	* A target dialect prefix
59	*/
60	public MyBatisBindTagProcessor(final TemplateMode templateMode, final String prefix) {
61	super(templateMode, prefix, null, false, ATTR_NAME, true, PRECEDENCE, true);	1✔
62	}	1✔
63
64	/**
65	* {@inheritDoc}
66	*/
67	@Override
68	protected void doProcess(ITemplateContext context, IProcessableElementTag tag, AttributeName attributeName,
69	String attributeValue, IElementTagStructureHandler structureHandler) {
70	AssignationSequence assignations = AssignationUtils.parseAssignationSequence(context, attributeValue, false);	1✔
71
72	List<Assignation> assignationValues = assignations.getAssignations();	1✔
73	assignationValues.forEach(assignation -> {	1✔
74	IStandardExpression nameExp = assignation.getLeft();	1✔
75	Object name = nameExp.execute(context);	1✔
76	IStandardExpression valueExp = assignation.getRight();	1✔
77	Object value = valueExp.execute(context);	1✔
78
79	if (Objects.isNull(name) \|\| StringUtils.isEmpty(name.toString())) {	1✔
80	throw new TemplateProcessingException(	1✔
81	"Variable name expression evaluated as null or empty: \"" + nameExp + "\"");
82	}
83
84	MyBatisBindingContext bindingContext = MyBatisBindingContext.load(context);	1✔
85	bindingContext.setCustomBindVariable(name.toString(), value);	1✔
86	});	1✔
87	}	1✔
88
89	}

mybatis / thymeleaf-scripting / #1164

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