net.roboconf.dm.templating.internal.helpers.IsKeyHelper.java Source code

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Here is the source code for net.roboconf.dm.templating.internal.helpers.IsKeyHelper.java

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/**
 * Copyright 2015-2017 Linagora, Universit Joseph Fourier, Floralis
 *
 * The present code is developed in the scope of the joint LINAGORA -
 * Universit Joseph Fourier - Floralis research program and is designated
 * as a "Result" pursuant to the terms and conditions of the LINAGORA
 * - Universit Joseph Fourier - Floralis research program. Each copyright
 * holder of Results enumerated here above fully & independently holds complete
 * ownership of the complete Intellectual Property rights applicable to the whole
 * of said Results, and may freely exploit it in any manner which does not infringe
 * the moral rights of the other copyright holders.
 *
 * 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 net.roboconf.dm.templating.internal.helpers;

import java.io.IOException;
import java.util.Objects;

import net.roboconf.dm.templating.internal.contexts.VariableContextBean;

import org.apache.commons.lang3.StringUtils;

import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;

/**
 * @author Vincent Zurczak - Linagora
 */
public class IsKeyHelper implements Helper<String> {

    public static final String NAME = "is-key";

    /*
     * (non-Javadoc)
     * @see com.github.jknack.handlebars.Helper
     * #apply(java.lang.Object, com.github.jknack.handlebars.Options)
     */
    @Override
    public CharSequence apply(String context, Options options) throws IOException {

        CharSequence result = StringUtils.EMPTY;
        Object model = options.context.model();
        if (model instanceof VariableContextBean) {
            String name = ((VariableContextBean) model).getName();
            if (Objects.equals(name, context))
                result = ((VariableContextBean) model).getValue();
        }

        return result;
    }
}