Coverage report

| %line | %branch
--- | --- | ---
org.apache.commons.jelly.expression.jexl.JexlExpressionFactory$ExpressionSupportLocal |
92% |
100% |

1 |  |
     /*
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      * Copyright 2002,2004 The Apache Software Foundation.
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      *
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      * Licensed under the Apache License, Version 2.0 (the "License");
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      * you may not use this file except in compliance with the License.
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      * You may obtain a copy of the License at
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      *
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      *      http://www.apache.org/licenses/LICENSE-2.0
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      *
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      * Unless required by applicable law or agreed to in writing, software
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      * distributed under the License is distributed on an "AS IS" BASIS,
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      * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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      * See the License for the specific language governing permissions and
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      * limitations under the License.
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      */
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     package org.apache.commons.jelly.expression.jexl;
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     import org.apache.commons.jelly.JellyContext;
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     import org.apache.commons.jelly.JellyException;
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     import org.apache.commons.jelly.expression.Expression;
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     import org.apache.commons.jelly.expression.ExpressionSupport;
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     import org.apache.commons.jelly.expression.ExpressionFactory;
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     //import org.apache.commons.jexl.resolver.FlatResolver;
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     /**
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      * Represents a factory of <a href="http://jakarta.apache.org/commons/jexl.html">Jexl</a>
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      * expression which fully supports the Expression Language in JSTL and JSP.
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      * In addition this ExpressionFactory can also support Ant style variable
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      * names, where '.' is used inside variable names.
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      *
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      * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
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      * @version $Revision: 155420 $
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      */
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     public class JexlExpressionFactory implements ExpressionFactory {
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         /** whether we should allow Ant-style expresssions, using dots as part of variable name */
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         private boolean supportAntVariables = true;
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         // ExpressionFactory interface
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         //-------------------------------------------------------------------------
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         public Expression createExpression(String text) throws JellyException {
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     /*
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             org.apache.commons.jexl.Expression expr =
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                 org.apache.commons.jexl.ExpressionFactory.createExpression(text);
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             if ( isSupportAntVariables() ) {
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                 expr.addPostResolver(new FlatResolver());
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             }
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             return new JexlExpression( expr );
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     */
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             Expression jexlExpression = null;
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             try {
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                 // this method really does throw Exception
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                 jexlExpression = new JexlExpression(
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                 org.apache.commons.jexl.ExpressionFactory.createExpression(text)
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                 );
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             } catch (Exception e) {
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                 throw new JellyException("Unable to create expression: " + text, e);
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             }
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             if ( isSupportAntVariables() && isValidAntVariableName(text) ) {
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                 return new ExpressionSupportLocal(jexlExpression,text);
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             }
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             return jexlExpression;
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         }
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         // Properties
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         //-------------------------------------------------------------------------
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         /**
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          * @return whether we should allow Ant-style expresssions, using dots as
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          * part of variable name
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          */
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         public boolean isSupportAntVariables() {
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             return supportAntVariables;
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         }
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         /**
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          * Sets whether we should allow Ant-style expresssions, using dots as
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          * part of variable name
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          */
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         public void setSupportAntVariables(boolean supportAntVariables) {
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             this.supportAntVariables = supportAntVariables;
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         }
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         // Implementation methods
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         //-------------------------------------------------------------------------
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         /**
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          * @return true if the given string is a valid Ant variable name,
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          * typically thats alphanumeric text with '.' etc.
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          */
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         protected boolean isValidAntVariableName(String text) {
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             char[] class="keyword">chars = text.toCharArray();
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             for (int i = 0, size = chars.length; i < size; i++ ) {
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                 char ch = class="keyword">chars[i];
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                 // could maybe be a bit more restrictive...
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                 if ( Character.isWhitespace(ch) || ch == '[' || ch == ']' || ch == '(' || ch == ')') {
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                     return false;
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                 }
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             }
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             return true;
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         }
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         private class ExpressionSupportLocal extends ExpressionSupport {
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113 | 7527 |
             protected Expression jexlExpression = null;
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             protected String text = null;
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             public ExpressionSupportLocal(Expression jexlExpression, String text) {
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                 this.jexlExpression = jexlExpression;
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                 this.text = text;
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             }
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             public Object evaluate(JellyContext context) {
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                 Object answer = jexlExpression.evaluate(context);
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                 if ( answer == null ) {
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                     answer = context.getVariable(text);
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                 }
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                 return answer;
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             }
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             public String getExpressionText() {
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                 return "${" + text + "}";
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             }
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             public String toString() {
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                 return super.toString() + "[expression:" + text + "]";
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             }
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         }
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     }

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