de.taimos.pipeline.aws.cloudformation.parser.JSONParameterFileParser.java Source code

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Here is the source code for de.taimos.pipeline.aws.cloudformation.parser.JSONParameterFileParser.java

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/*
 * -
 * #%L
 * Pipeline: AWS Steps
 * %%
 * Copyright (C) 2017 Taimos 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.
 * #L%
 */

package de.taimos.pipeline.aws.cloudformation.parser;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;

import com.amazonaws.services.cloudformation.model.Parameter;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;

public class JSONParameterFileParser implements ParameterFileParser {

    @Override
    public Collection<Parameter> parseParams(InputStream fileContent) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        JsonNode tree = mapper.readTree(fileContent);
        Collection<Parameter> parameters = new ArrayList<>();
        if (tree instanceof ArrayNode) {
            ArrayNode jsonNodes = (ArrayNode) tree;
            for (JsonNode node : jsonNodes) {
                Parameter param = new Parameter();
                param.withParameterKey(node.get("ParameterKey").asText());
                if (node.has("ParameterValue")) {
                    param.withParameterValue(node.get("ParameterValue").asText());
                }
                if (node.has("UsePreviousValue")) {
                    param.withUsePreviousValue(node.get("UsePreviousValue").booleanValue());
                }
                parameters.add(param);
            }
        }
        return parameters;
    }

}