cherry.foundation.navi.NavigatorImpl.java Source code

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Here is the source code for cherry.foundation.navi.NavigatorImpl.java

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/*
 * Copyright 2014,2015 agwlvssainokuni
 *
 * 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 cherry.foundation.navi;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.core.io.Resource;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;

public class NavigatorImpl implements Navigator, InitializingBean {

    private Resource navigationDef;

    private ObjectMapper objectMapper;

    private Map<String, NaviNode> nodeMap;

    public void setNavigationDef(Resource navigationDef) {
        this.navigationDef = navigationDef;
    }

    public void setObjectMapper(ObjectMapper objectMapper) {
        this.objectMapper = objectMapper;
    }

    @Override
    public void afterPropertiesSet() throws IOException {
        try (InputStream in = navigationDef.getInputStream()) {
            NaviNode root = objectMapper.readValue(in, NaviNode.class);
            nodeMap = toMap(root, new HashMap<String, NaviNode>());
        }
    }

    private Map<String, NaviNode> toMap(NaviNode node, Map<String, NaviNode> map) {
        map.put(node.getName(), node);
        if (node.getChildren() == null) {
            return map;
        }
        for (NaviNode child : node.getChildren()) {
            child.setParent(node);
            toMap(child, map);
        }
        return map;
    }

    @Override
    public List<Node> navigate(String name) {
        List<Node> list = new ArrayList<>();
        boolean flag = true;
        for (NaviNode nd = nodeMap.get(name); nd != null; nd = nd.getParent()) {
            Node node = new Node();
            node.setName(nd.getName());
            node.setUri(nd.getUri());
            node.setLast(flag);
            list.add(node);
            flag = false;
        }
        Collections.reverse(list);
        return list;
    }

    public static class NaviNode {

        @JsonProperty
        private String name;

        @JsonProperty
        private String uri;

        @JsonProperty
        private List<NaviNode> children;

        private NaviNode parent;

        @Override
        public String toString() {
            ReflectionToStringBuilder builder = new ReflectionToStringBuilder(this,
                    ToStringStyle.SHORT_PREFIX_STYLE);
            builder.setExcludeFieldNames("parent");
            return builder.build();
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public String getUri() {
            return uri;
        }

        public void setUri(String uri) {
            this.uri = uri;
        }

        public List<NaviNode> getChildren() {
            return children;
        }

        public void setChildren(List<NaviNode> children) {
            this.children = children;
        }

        public NaviNode getParent() {
            return parent;
        }

        public void setParent(NaviNode parent) {
            this.parent = parent;
        }
    }

}