de.micromata.genome.gwiki.page.gspt.BindingAccessor.java Source code

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Here is the source code for de.micromata.genome.gwiki.page.gspt.BindingAccessor.java

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//
// Copyright (C) 2010-2016 Roger Rene Kommer & Micromata GmbH
//
// 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
//
//  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 de.micromata.genome.gwiki.page.gspt;

import groovy.lang.Binding;
import groovy.lang.MissingPropertyException;

import java.util.Map;

import javax.servlet.jsp.el.VariableResolver;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.log4j.Logger;

/**
 * Ueber diese Klasse fasst der JSP-PageContext den Groovy-Context an.
 * 
 * @author jens@micromata.de
 */
@SuppressWarnings("deprecation")
public class BindingAccessor implements VariableResolver {
    // TODO pop logging verwenden
    private static final Logger log = Logger.getLogger(BindingAccessor.class);

    private final Binding binding;

    /**
     * @param binding groovy-binding
     */
    public BindingAccessor(final Binding binding) {
        this.binding = binding;
    }

    public Binding getBinding() {
        return binding;
    }

    public Object resolveVariable(String key) {
        try {
            return binding.getVariable(key);
        } catch (MissingPropertyException e) {
            return null;
        }
    }

    public boolean isVariableDefined(String key) {
        return binding.getVariables().containsKey(key);
    }

    @SuppressWarnings("unchecked")
    public Map<? super String, ?> getVarMap() {
        return binding.getVariables();
    }

    public void setBeanVar(String property, Object value) {
        int firstDotPos = property.indexOf('.');
        if (firstDotPos < 1) {
            binding.setVariable(property, value);
            return;
        }
        Object obj = binding.getVariable(property.substring(0, firstDotPos));
        if (obj == null) {
            binding.setVariable(property, value);
            return;
        }
        final String propertyName = property.substring(firstDotPos + 1);
        try {
            BeanUtils.setProperty(obj, propertyName, value);
        } catch (Exception ex) {
            log.warn("Exception encountered while setting '" + propertyName + "' on instance of "
                    + obj.getClass().getName() + ": " + ex, ex);
            throw new RuntimeException(ex);
        }
    }
}