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Elasticsearch Hadoop Cascading
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.elasticsearch.hadoop.serialization.json;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonStreamContext;
import org.codehaus.jackson.JsonToken;
import org.codehaus.jackson.impl.JsonParserBase;
import org.elasticsearch.hadoop.serialization.EsHadoopSerializationException;
import org.elasticsearch.hadoop.serialization.Parser;
public class JacksonJsonParser implements Parser {
private static final JsonFactory JSON_FACTORY;
private final JsonParser parser;
private final JsonParserBase richerParser;
static {
JSON_FACTORY = new JsonFactory();
//JSON_FACTORY.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
//JSON_FACTORY.configure(JsonGenerator.Feature.QUOTE_FIELD_NAMES, true);
//JSON_FACTORY.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
//JSON_FACTORY.configure(JsonParser.Feature.ALLOW_BACKSLASH_ESCAPING_ANY_CHARACTER, true);
//JSON_FACTORY.configure(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS, true);
}
public JacksonJsonParser(InputStream in) {
try {
this.parser = JSON_FACTORY.createJsonParser(in);
richerParser = (parser instanceof JsonParserBase ? (JsonParserBase) parser : null);
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
public JacksonJsonParser(byte[] content) {
this(content, 0, content.length);
}
public JacksonJsonParser(byte[] content, int offset, int length) {
try {
this.parser = JSON_FACTORY.createJsonParser(content, offset, length);
richerParser = (parser instanceof JsonParserBase ? (JsonParserBase) parser : null);
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
public JacksonJsonParser(JsonParser parser) {
this.parser = parser;
richerParser = (parser instanceof JsonParserBase ? (JsonParserBase) parser : null);
}
@Override
public Token currentToken() {
return convertToken(parser.getCurrentToken());
}
@Override
public Object currentValue() {
try {
return (parser.getCurrentToken().isNumeric() ? parser.getNumberValue() : parser.getText());
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public Token nextToken() {
try {
return convertToken(parser.nextToken());
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
private Token convertToken(JsonToken token) {
if (token == null) {
return null;
}
switch (token) {
case FIELD_NAME:
return Token.FIELD_NAME;
case VALUE_FALSE:
case VALUE_TRUE:
return Token.VALUE_BOOLEAN;
case VALUE_STRING:
return Token.VALUE_STRING;
case VALUE_NUMBER_INT:
case VALUE_NUMBER_FLOAT:
return Token.VALUE_NUMBER;
case VALUE_NULL:
return Token.VALUE_NULL;
case START_OBJECT:
return Token.START_OBJECT;
case END_OBJECT:
return Token.END_OBJECT;
case START_ARRAY:
return Token.START_ARRAY;
case END_ARRAY:
return Token.END_ARRAY;
case VALUE_EMBEDDED_OBJECT:
return Token.VALUE_EMBEDDED_OBJECT;
case NOT_AVAILABLE:
throw new UnsupportedOperationException();
}
throw new EsHadoopSerializationException("No matching token for json_token [" + token + "]");
}
@Override
public void skipChildren() {
try {
parser.skipChildren();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public String absoluteName() {
List tree = new ArrayList();
for (JsonStreamContext ctx = parser.getParsingContext(); ctx != null; ctx = ctx.getParent()) {
if (ctx.inObject()) {
tree.add(ctx.getCurrentName());
}
}
StringBuilder sb = new StringBuilder();
for (int index = tree.size(); index > 0; index--) {
sb.append(tree.get(index - 1));
sb.append(".");
}
// remove the last .
sb.setLength(sb.length() - 1);
return sb.toString();
}
@Override
public String currentName() {
try {
return parser.getCurrentName();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public String text() {
try {
return parser.getText();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public byte[] bytes() {
throw new UnsupportedOperationException("not implemented yet");
}
@Override
public Number numberValue() {
try {
return parser.getNumberValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public NumberType numberType() {
try {
return convertNumberType(parser.getNumberType());
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public short shortValue() {
try {
return parser.getShortValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public int intValue() {
try {
return parser.getIntValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public long longValue() {
try {
return parser.getLongValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public float floatValue() {
try {
return parser.getFloatValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public double doubleValue() {
try {
return parser.getDoubleValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public boolean booleanValue() {
try {
return parser.getBooleanValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public byte[] binaryValue() {
try {
return parser.getBinaryValue();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
@Override
public void close() {
try {
parser.close();
} catch (IOException ex) {
throw new EsHadoopSerializationException(ex);
}
}
private NumberType convertNumberType(JsonParser.NumberType numberType) {
switch (numberType) {
case INT:
return NumberType.INT;
case LONG:
return NumberType.LONG;
case FLOAT:
return NumberType.FLOAT;
case DOUBLE:
return NumberType.DOUBLE;
case BIG_INTEGER:
return NumberType.DOUBLE;
case BIG_DECIMAL:
return NumberType.DOUBLE;
}
throw new EsHadoopSerializationException("No matching token for number_type [" + numberType + "]");
}
@Override
public int tokenCharOffset() {
return (int) (richerParser != null ? richerParser.getTokenCharacterOffset() : parser.getTokenLocation().getCharOffset());
}
}