Example usage for org.eclipse.jdt.core.dom TagElement setProperty

Introduction

In this page you can find the example usage for org.eclipse.jdt.core.dom TagElement setProperty.

Prototype

public final void setProperty(String propertyName, Object data) 

Source Link

Document

Sets the named property of this node to the given value, or to null to clear it.

Usage

From source file:org.eclipse.wb.internal.core.model.JavaInfoEvaluationHelper.java

License:Open Source License

/**
 * Evaluates value of expression specified in JavaDoc comments like this:
 * //from  w w w .j av  a2s .  c o m
 * @wbp.eval.method.parameter someName someExpression
 * 
 * @param javadoc
 *          the {@link Javadoc} that should be checked.
 * @param tagName
 *          the name of tag, "@wbp.eval.method.parameter" in example above.
 * @param expectedName
 *          the name of expression, "someName" in example above.
 */
public static Object evaluateJavadocTagExpression(AstEditor editor, EvaluationContext context, Javadoc javadoc,
        String tagName, String expectedName) throws Exception {
    if (javadoc != null) {
        for (TagElement tag : DomGenerics.tags(javadoc)) {
            if (tagName.equals(tag.getTagName())) {
                // extract <name> and <expression text>
                String name;
                String expressionText;
                {
                    String errorMessage = "'" + tagName + " <name> = <expression>' expected but '" + tag
                            + "' found.";
                    Assert.isLegal(tag.fragments().size() == 1, errorMessage);
                    // prepare TextElement parts
                    TextElement textElement = (TextElement) tag.fragments().get(0);
                    String text = textElement.getText().trim();
                    String[] parts = StringUtils.split(text);
                    Assert.isLegal(parts.length >= 2, errorMessage);
                    // assign parts
                    name = parts[0];
                    expressionText = text.substring(name.length()).trim();
                }
                // check that we found expected <name>
                if (name.equals(expectedName)) {
                    Object value = tag.getProperty(KEY_EXPRESSION_VALUE);
                    // evaluate value only one time
                    if (value == null) {
                        Expression expression = editor.getParser().parseExpression(javadoc.getStartPosition(),
                                expressionText);
                        value = AstEvaluationEngine.evaluate(context, expression);
                        tag.setProperty(KEY_EXPRESSION_VALUE, value);
                    }
                    // return value
                    return value;
                }
            }
        }
    }
    // no value found 
    return AstEvaluationEngine.UNKNOWN;
}

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