org.pentaho.metaverse.api.Namespace.java Source code

Introduction

Here is the source code for org.pentaho.metaverse.api.Namespace.java

Source

/*! ******************************************************************************
 *
 * Pentaho Data Integration
 *
 * Copyright (C) 2002-2015 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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 org.pentaho.metaverse.api;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.pentaho.dictionary.DictionaryConst;

/**
 * This is the default implementation for namespace objects and includes methods for working with namespaces
 */
public class Namespace implements INamespace {

    // Single re-usable ObjectMapper for JSON-to-Java conversions
    private static final ObjectMapper objectMapper = new ObjectMapper();

    private String namespace;

    public Namespace(String namespace) {
        this.namespace = namespace;
    }

    @Override
    public String getNamespaceId() {
        return namespace;
    }

    @Override
    public INamespace getParentNamespace() {
        if (namespace != null) {
            try {
                JsonNode jsonObject = objectMapper.readTree(namespace);
                JsonNode namespaceNode = jsonObject.get(DictionaryConst.PROPERTY_NAMESPACE);
                if (namespaceNode == null) {
                    return null;
                }
                String parent;

                if (namespaceNode.isTextual()) {
                    parent = namespaceNode.asText();
                } else {
                    parent = namespaceNode.toString();
                }

                return new Namespace(parent);
            } catch (Exception e) {
                return null;
            }
        }
        return null;
    }

    @Override
    public INamespace getSiblingNamespace(String name, String type) {
        if (namespace != null) {
            try {
                JsonNode jsonObject = objectMapper.readTree(namespace);

                if (jsonObject.isObject()) {
                    ObjectNode object = (ObjectNode) jsonObject;
                    object.put(DictionaryConst.PROPERTY_NAME, name);
                    object.put(DictionaryConst.PROPERTY_TYPE, type);
                }

                return new Namespace(objectMapper.writeValueAsString(jsonObject));
            } catch (Exception e) {
                return null;
            }
        }
        return null;
    }
}