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package io.github.ro4.check; |
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import io.github.ro4.ExpressionException; |
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import io.github.ro4.constant.MagicMark; |
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import io.github.ro4.Context; |
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import org.springframework.beans.factory.BeanFactory; |
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import org.springframework.context.expression.BeanFactoryResolver; |
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import org.springframework.expression.spel.standard.SpelExpressionParser; |
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import org.springframework.expression.spel.support.StandardEvaluationContext; |
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public class SpELChecker implements Checker { |
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private static final SpelExpressionParser PARSER = new SpelExpressionParser(); |
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private BeanFactory beanFactory = null; |
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public SpELChecker() { |
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} |
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public SpELChecker(BeanFactory beanFactory) { |
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this.beanFactory = beanFactory; |
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} |
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@Override |
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public boolean pass(Context ctx) { |
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if (!ctx.hasAttribute(MagicMark.EXPRESSION)) { |
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throw new ExpressionException("expression not found"); |
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} |
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StandardEvaluationContext spELCtx = new StandardEvaluationContext(); |
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// ugly design, temporary work |
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if (null != beanFactory) { |
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spELCtx.setBeanResolver(new BeanFactoryResolver(beanFactory)); |
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} |
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for (String s : ctx.attributeNames()) { |
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spELCtx.setVariable(s, ctx.getAttribute(s)); |
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} |
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String expression = (String) ctx.getAttribute(MagicMark.EXPRESSION); |
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assert expression != null; |
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return Boolean.TRUE.equals(PARSER.parseExpression(expression).getValue(spELCtx, Boolean.TYPE)); |
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} |
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} |
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ro4 /
vanilla
