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/**
 * Copyright (c) 2012-2015 Edgar Espina
 *
 * This file is part of Handlebars.java.
 *
 * 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 com.github.jknack.handlebars.helper;

import java.io.IOException;

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

/**
 * 

* Normally, Handlebars templates are evaluated against the context passed into * the compiled method. *

*

* You can shift the context for a section of a template by using the built-in * with block helper. *

* * @author edgar.espina * @since 0.3.0 */ public class WithHelper implements Helper { /** * A singleton instance of this helper. */ public static final Helper INSTANCE = new WithHelper(); /** * The helper's name. */ public static final String NAME = "with"; @Override public CharSequence apply(final Object context, final Options options) throws IOException { Buffer buffer = options.buffer(); if (options.isFalsy(context)) { buffer.append(options.inverse(context)); } else { buffer.append(options.fn(context)); } return buffer; } }