/*
* 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.common.text;
import com.google.common.base.Charsets;
import org.elasticsearch.common.bytes.BytesArray;
import org.elasticsearch.common.bytes.BytesReference;
/**
* Both {@link String} and {@link BytesReference} representation of the text. Starts with one of those, and if
* the other is requests, caches the other one in a local reference so no additional conversion will be needed.
*/
public class StringAndBytesText implements Text {
public static final Text[] EMPTY_ARRAY = new Text[0];
public static Text[] convertFromStringArray(String[] strings) {
if (strings.length == 0) {
return EMPTY_ARRAY;
}
Text[] texts = new Text[strings.length];
for (int i = 0; i < strings.length; i++) {
texts[i] = new StringAndBytesText(strings[i]);
}
return texts;
}
private BytesReference bytes;
private String text;
private int hash;
public StringAndBytesText(BytesReference bytes) {
this.bytes = bytes;
}
public StringAndBytesText(String text) {
this.text = text;
}
@Override
public boolean hasBytes() {
return bytes != null;
}
@Override
public BytesReference bytes() {
if (bytes == null) {
bytes = new BytesArray(text.getBytes(Charsets.UTF_8));
}
return bytes;
}
@Override
public boolean hasString() {
return text != null;
}
@Override
public String string() {
// TODO: we can optimize the conversion based on the bytes reference API similar to UnicodeUtil
if (text == null) {
if (!bytes.hasArray()) {
bytes = bytes.toBytesArray();
}
text = new String(bytes.array(), bytes.arrayOffset(), bytes.length(), Charsets.UTF_8);
}
return text;
}
@Override
public String toString() {
return string();
}
@Override
public int hashCode() {
if (hash == 0) {
hash = bytes().hashCode();
}
return hash;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
return bytes().equals(((Text) obj).bytes());
}
@Override
public int compareTo(Text text) {
return UTF8SortedAsUnicodeComparator.utf8SortedAsUnicodeSortOrder.compare(bytes(), text.bytes());
}
}