la.alsocan.jsonshapeshifter.bindings.StringHandlebarsBinding.java Source code

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Here is the source code for la.alsocan.jsonshapeshifter.bindings.StringHandlebarsBinding.java

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/*
 * The MIT License
 *
 * Copyright 2014 Florian Poulin - https://github.com/fpoulin.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package la.alsocan.jsonshapeshifter.bindings;

import com.fasterxml.jackson.databind.JsonNode;
import com.github.jknack.handlebars.Handlebars;
import com.github.jknack.handlebars.Template;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import la.alsocan.jsonshapeshifter.Default;
import la.alsocan.jsonshapeshifter.schemas.SchemaNode;

/**
 * @author Florian Poulin - https://github.com/fpoulin
 */
public class StringHandlebarsBinding extends Binding<String> {

    private final Template template;
    private final Map<String, Binding> params;

    public StringHandlebarsBinding(String template, Map<String, Binding> params) throws IOException {

        Handlebars handlebars = new Handlebars();
        this.template = handlebars.compileInline(template);
        this.params = params;
    }

    @Override
    public Set<SchemaNode> getSourceNodes() {
        Set<SchemaNode> nodes = new HashSet<>();
        params.values().stream().forEach((b) -> {
            nodes.addAll(b.getSourceNodes());
        });
        return nodes;
    }

    @Override
    public String getValue(JsonNode payload, List context) {

        final Map<String, Object> values = new HashMap<>();
        params.keySet().stream().forEach((key) -> {
            values.put(key, params.get(key).getValue(payload, context));
        });

        String result;
        try {
            result = template.apply(values);
        } catch (IOException e) {
            result = Default.DEFAULT_STRING;
        }
        return result;
    }
}