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/*
* Licensed to ElasticSearch and Shay Banon 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.index.mapper.core;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.ElasticSearchParseException;
import org.elasticsearch.common.Base64;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.compress.CompressorFactory;
import org.elasticsearch.common.io.stream.CachedStreamOutput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.codec.postingsformat.PostingsFormatProvider;
import org.elasticsearch.index.fielddata.FieldDataType;
import org.elasticsearch.index.mapper.*;
import java.io.IOException;
import java.util.Map;
import static org.elasticsearch.common.xcontent.support.XContentMapValues.nodeBooleanValue;
import static org.elasticsearch.index.mapper.MapperBuilders.binaryField;
import static org.elasticsearch.index.mapper.core.TypeParsers.parseField;
/**
*
*/
public class BinaryFieldMapper extends AbstractFieldMapper {
public static final String CONTENT_TYPE = "binary";
public static class Defaults extends AbstractFieldMapper.Defaults {
public static final long COMPRESS_THRESHOLD = -1;
public static final FieldType FIELD_TYPE = new FieldType(AbstractFieldMapper.Defaults.FIELD_TYPE);
static {
FIELD_TYPE.setIndexed(false);
FIELD_TYPE.setStored(true);
FIELD_TYPE.freeze();
}
}
public static class Builder extends AbstractFieldMapper.Builder {
private Boolean compress = null;
private long compressThreshold = Defaults.COMPRESS_THRESHOLD;
public Builder(String name) {
super(name, new FieldType(Defaults.FIELD_TYPE));
builder = this;
}
public Builder compress(boolean compress) {
this.compress = compress;
return this;
}
public Builder compressThreshold(long compressThreshold) {
this.compressThreshold = compressThreshold;
return this;
}
@Override
public Builder indexName(String indexName) {
return super.indexName(indexName);
}
@Override
public BinaryFieldMapper build(BuilderContext context) {
return new BinaryFieldMapper(buildNames(context), fieldType, compress, compressThreshold, provider);
}
}
public static class TypeParser implements Mapper.TypeParser {
@Override
public Mapper.Builder parse(String name, Map node, ParserContext parserContext) throws MapperParsingException {
BinaryFieldMapper.Builder builder = binaryField(name);
parseField(builder, name, node, parserContext);
for (Map.Entry entry : node.entrySet()) {
String fieldName = Strings.toUnderscoreCase(entry.getKey());
Object fieldNode = entry.getValue();
if (fieldName.equals("compress") && fieldNode != null) {
builder.compress(nodeBooleanValue(fieldNode));
} else if (fieldName.equals("compress_threshold") && fieldNode != null) {
if (fieldNode instanceof Number) {
builder.compressThreshold(((Number) fieldNode).longValue());
builder.compress(true);
} else {
builder.compressThreshold(ByteSizeValue.parseBytesSizeValue(fieldNode.toString()).bytes());
builder.compress(true);
}
}
}
return builder;
}
}
private Boolean compress;
private long compressThreshold;
protected BinaryFieldMapper(Names names, FieldType fieldType, Boolean compress, long compressThreshold, PostingsFormatProvider provider) {
super(names, 1.0f, fieldType, null, null, provider, null, null);
this.compress = compress;
this.compressThreshold = compressThreshold;
}
@Override
public FieldType defaultFieldType() {
return Defaults.FIELD_TYPE;
}
@Override
public FieldDataType defaultFieldDataType() {
return null;
}
@Override
public Object valueForSearch(Object value) {
return value(value);
}
@Override
public BytesReference value(Object value) {
if (value == null) {
return null;
}
BytesReference bytes;
if (value instanceof BytesRef) {
bytes = new BytesArray((BytesRef) value);
} else if (value instanceof BytesReference) {
bytes = (BytesReference) value;
} else if (value instanceof byte[]) {
bytes = new BytesArray((byte[]) value);
} else {
try {
bytes = new BytesArray(Base64.decode(value.toString()));
} catch (IOException e) {
throw new ElasticSearchParseException("failed to convert bytes", e);
}
}
try {
return CompressorFactory.uncompressIfNeeded(bytes);
} catch (IOException e) {
throw new ElasticSearchParseException("failed to decompress source", e);
}
}
@Override
protected Field parseCreateField(ParseContext context) throws IOException {
if (!fieldType().stored()) {
return null;
}
byte[] value;
if (context.parser().currentToken() == XContentParser.Token.VALUE_NULL) {
return null;
} else {
value = context.parser().binaryValue();
if (compress != null && compress && !CompressorFactory.isCompressed(value, 0, value.length)) {
if (compressThreshold == -1 || value.length > compressThreshold) {
CachedStreamOutput.Entry cachedEntry = CachedStreamOutput.popEntry();
StreamOutput streamOutput = cachedEntry.bytes(CompressorFactory.defaultCompressor());
streamOutput.writeBytes(value, 0, value.length);
streamOutput.close();
// we copy over the byte array, since we need to push back the cached entry
// TODO, we we had a handle into when we are done with parsing, then we push back then and not copy over bytes
value = cachedEntry.bytes().bytes().copyBytesArray().toBytes();
CachedStreamOutput.pushEntry(cachedEntry);
}
}
}
if (value == null) {
return null;
}
return new Field(names.indexName(), value, fieldType);
}
@Override
protected String contentType() {
return CONTENT_TYPE;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(names.name());
builder.field("type", contentType());
if (!names.name().equals(names.indexNameClean())) {
builder.field("index_name", names.indexNameClean());
}
if (compress != null) {
builder.field("compress", compress);
}
if (compressThreshold != -1) {
builder.field("compress_threshold", new ByteSizeValue(compressThreshold).toString());
}
if (fieldType.stored() != defaultFieldType().stored()) {
builder.field("store", fieldType.stored());
}
builder.endObject();
return builder;
}
@Override
public void merge(Mapper mergeWith, MergeContext mergeContext) throws MergeMappingException {
BinaryFieldMapper sourceMergeWith = (BinaryFieldMapper) mergeWith;
if (!mergeContext.mergeFlags().simulate()) {
if (sourceMergeWith.compress != null) {
this.compress = sourceMergeWith.compress;
}
if (sourceMergeWith.compressThreshold != -1) {
this.compressThreshold = sourceMergeWith.compressThreshold;
}
}
}
}
