com.nebhale.jsonpath.internal.component.DeepWildcardPathComponent.java Source code

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Here is the source code for com.nebhale.jsonpath.internal.component.DeepWildcardPathComponent.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 com.nebhale.jsonpath.internal.component;

import java.util.Iterator;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.JsonNodeFactory;

/**
 * A {@link PathComponent} that handles deep wildcards
 * <p />
 *
 * <strong>Concurrent Semantics</strong><br />
 *
 * Thread-safe
 */
public final class DeepWildcardPathComponent extends AbstractChainedPathComponent {

    public DeepWildcardPathComponent(PathComponent delegate) {
        super(delegate);
    }

    @Override
    protected JsonNode select(JsonNode input) {
        return getAllNodes(input);
    }

    private ArrayNode getAllNodes(JsonNode root) {
        ArrayNode nodes = JsonNodeFactory.instance.arrayNode();
        nodes.add(root);

        if (root.isArray()) {
            for (JsonNode node : root) {
                nodes.addAll(getAllNodes(node));
            }
        } else {
            for (Iterator<String> i = root.fieldNames(); i.hasNext();) {
                nodes.addAll(getAllNodes(root.get(i.next())));
            }
        }

        return nodes;
    }

    @Override
    public String toString() {
        return "DeepWildcardPathComponent []";
    }

}