/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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

 * 

 *      http://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.apache.taglibs.standard.tlv;

/**

 */

public class JstlELCoreTLV extends JstlCoreTLV {

    @Override

    protected String validateExpression(String elem, String att, String expr) {

        return ValidationUtil.validateExpression(elem, att, expr);

    }

}

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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

 * 

 *      http://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.apache.taglibs.standard.tlv;

/**

 */

public class JstlELFmtTLV extends JstlFmtTLV {

    @Override

    protected String validateExpression(String elem, String att, String expr) {

        return ValidationUtil.validateExpression(elem, att, expr);

    }

}

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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

 * 

 *      http://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.apache.taglibs.standard.tlv;

/**

 */

public class JstlELSqlTLV extends JstlSqlTLV {

    @Override

    protected String validateExpression(String elem, String att, String expr) {

        return ValidationUtil.validateExpression(elem, att, expr);

    }

}

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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

 * 

 *      http://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.apache.taglibs.standard.tlv;

/**

 */

public class JstlELXmlTLV extends JstlXmlTLV {

    @Override

    protected String validateExpression(String elem, String att, String expr) {

        return ValidationUtil.validateExpression(elem, att, expr);

    }

}

/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You 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

 * 

 *      http://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.apache.taglibs.standard.tlv;

import javax.servlet.jsp.JspException;

import org.apache.taglibs.standard.lang.support.ExpressionEvaluator;

import org.apache.taglibs.standard.lang.support.ExpressionEvaluatorManager;

/**

 */

public class ValidationUtil {

    static String validateExpression(

            String elem, String att, String expr) {

        // let's just use the cache kept by the ExpressionEvaluatorManager

        ExpressionEvaluator current;

        try {

            current =

                    ExpressionEvaluatorManager.getEvaluatorByName(

                            ExpressionEvaluatorManager.EVALUATOR_CLASS);

        } catch (JspException ex) {

            // (using JspException here feels ugly, but it's what EEM uses)

            return ex.getMessage();

        }

        String response = current.validate(att, expr);

        if (response == null) {

            return response;

        } else {

            return "tag = '" + elem + "' / attribute = '" + att + "': "

                    + response;

        }

    }

}