57 lines
1.2 KiB
Java
57 lines
1.2 KiB
Java
package eu.dnetlib.data.collector.plugins.mongo;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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import java.util.Iterator;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParser;
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public class MongoDumpIterator implements Iterator<String> {
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private final BufferedReader inputStream;
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private String currentLine = null;
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public MongoDumpIterator(final FileReader inputStream) {
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this.inputStream = new BufferedReader(inputStream);
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this.currentLine = getNextLine();
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}
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@Override
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public boolean hasNext() {
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return currentLine != null;
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}
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@Override
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public String next() {
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final String returnedString = this.currentLine;
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this.currentLine = getNextLine();
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return returnedString;
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}
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@Override
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public void remove() {
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// TODO Auto-generated method stub
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}
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private String getNextLine() {
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try {
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String input = inputStream.readLine();
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while (input != null) {
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JsonElement jElement = new JsonParser().parse(input);
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JsonObject jobject = jElement.getAsJsonObject();
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if (jobject.has("body")) { return jobject.get("body").getAsString(); }
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input = inputStream.readLine();
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}
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return null;
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} catch (IOException e) {
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return null;
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}
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}
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}
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