/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * 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.
 * </p>
 */

package io.shardingsphere.orchestration.internal.yaml.representer;

import org.yaml.snakeyaml.introspector.Property;
import org.yaml.snakeyaml.nodes.CollectionNode;
import org.yaml.snakeyaml.nodes.MappingNode;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.NodeTuple;
import org.yaml.snakeyaml.nodes.SequenceNode;
import org.yaml.snakeyaml.nodes.Tag;
import org.yaml.snakeyaml.representer.Representer;

/**
 * Sharding or master-slave rule config representer.
 *
 * @author panjuan
 */
public class DataSourceParameterRepresenter extends Representer {
    
    @Override
    protected NodeTuple representJavaBeanProperty(Object javaBean, Property property,
                                                  Object propertyValue, Tag customTag) {
        NodeTuple tuple = super.representJavaBeanProperty(javaBean, property, propertyValue, customTag);
        Node valueNode = tuple.getValueNode();
        if (Tag.NULL.equals(valueNode.getTag())) {
            return null;
        }
        if (valueNode instanceof CollectionNode) {
            if (Tag.SEQ.equals(valueNode.getTag())) {
                SequenceNode seq = (SequenceNode) valueNode;
                if (seq.getValue().isEmpty()) {
                    return null;
                }
            }
            if (Tag.MAP.equals(valueNode.getTag())) {
                MappingNode seq = (MappingNode) valueNode;
                if (seq.getValue().isEmpty()) {
                    return null;
                }
            }
        }
        return tuple;
    }
}

/*
 * Copyright 2016-2018 shardingsphere.io.
 * <p>
 * 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.
 * </p>
 */

package io.shardingsphere.orchestration.internal.yaml.representer;

import org.yaml.snakeyaml.introspector.Property;
import org.yaml.snakeyaml.nodes.CollectionNode;
import org.yaml.snakeyaml.nodes.MappingNode;
import org.yaml.snakeyaml.nodes.Node;
import org.yaml.snakeyaml.nodes.NodeTuple;
import org.yaml.snakeyaml.nodes.SequenceNode;
import org.yaml.snakeyaml.nodes.Tag;
import org.yaml.snakeyaml.representer.Represent;
import org.yaml.snakeyaml.representer.Representer;

/**
 * Sharding or master-slave rule config representer.
 *
 * @author panjuan
 */
public class DataSourceParameterRepresenter extends Representer {
    
    public DataSourceParameterRepresenter() {
        super();
        nullRepresenter = new DataSourceParameterRepresenter.NullRepresent();
    }
    
    @Override
    protected NodeTuple representJavaBeanProperty(Object javaBean, Property property,
                                                  Object propertyValue, Tag customTag) {
        NodeTuple tuple = super.representJavaBeanProperty(javaBean, property, propertyValue, customTag);
        Node valueNode = tuple.getValueNode();
        if (Tag.NULL.equals(valueNode.getTag())) {
            return null;
        }
        if (valueNode instanceof CollectionNode) {
            if (Tag.SEQ.equals(valueNode.getTag())) {
                SequenceNode seq = (SequenceNode) valueNode;
                if (seq.getValue().isEmpty()) {
                    return null;
                }
            }
            if (Tag.MAP.equals(valueNode.getTag())) {
                MappingNode seq = (MappingNode) valueNode;
                if (seq.getValue().isEmpty()) {
                    return null;
                }
            }
        }
        return tuple;
    }
    
    private class NullRepresent implements Represent {
        public Node representData(final Object data) {
            return representScalar(Tag.NULL, "");
        }
    }
}

add null representer