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org.elasticsearch.rest.action.support.RestTable Maven / Gradle / Ivy
/*
* 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.rest.action.support;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.io.UTF8StreamWriter;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.SizeValue;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.*;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
*/
public class RestTable {
public static RestResponse buildResponse(Table table, RestChannel channel) throws Exception {
RestRequest request = channel.request();
XContentType xContentType = XContentType.fromRestContentType(request.param("format", request.header("Content-Type")));
if (xContentType != null) {
return buildXContentBuilder(table, channel);
}
return buildTextPlainResponse(table, channel);
}
public static RestResponse buildXContentBuilder(Table table, RestChannel channel) throws Exception {
RestRequest request = channel.request();
XContentBuilder builder = channel.newBuilder();
List displayHeaders = buildDisplayHeaders(table, request);
builder.startArray();
for (int row = 0; row < table.getRows().size(); row++) {
builder.startObject();
for (DisplayHeader header : displayHeaders) {
builder.field(header.display, renderValue(request, table.getAsMap().get(header.name).get(row).value));
}
builder.endObject();
}
builder.endArray();
return new BytesRestResponse(RestStatus.OK, builder);
}
public static RestResponse buildTextPlainResponse(Table table, RestChannel channel) throws IOException {
RestRequest request = channel.request();
boolean verbose = request.paramAsBoolean("v", false);
List headers = buildDisplayHeaders(table, request);
int[] width = buildWidths(table, request, verbose, headers);
BytesStreamOutput bytesOut = channel.bytesOutput();
UTF8StreamWriter out = new UTF8StreamWriter().setOutput(bytesOut);
if (verbose) {
for (int col = 0; col < headers.size(); col++) {
DisplayHeader header = headers.get(col);
pad(new Table.Cell(header.display, table.findHeaderByName(header.name)), width[col], request, out);
out.append(" ");
}
out.append("\n");
}
for (int row = 0; row < table.getRows().size(); row++) {
for (int col = 0; col < headers.size(); col++) {
DisplayHeader header = headers.get(col);
pad(table.getAsMap().get(header.name).get(row), width[col], request, out);
out.append(" ");
}
out.append("\n");
}
out.close();
return new BytesRestResponse(RestStatus.OK, BytesRestResponse.TEXT_CONTENT_TYPE, bytesOut.bytes(), true);
}
private static List buildDisplayHeaders(Table table, RestRequest request) {
String pHeaders = request.param("h");
List display = new ArrayList<>();
if (pHeaders != null) {
for (String possibility : Strings.splitStringByCommaToArray(pHeaders)) {
DisplayHeader dispHeader = null;
if (table.getAsMap().containsKey(possibility)) {
dispHeader = new DisplayHeader(possibility, possibility);
} else {
for (Table.Cell headerCell : table.getHeaders()) {
String aliases = headerCell.attr.get("alias");
if (aliases != null) {
for (String alias : Strings.splitStringByCommaToArray(aliases)) {
if (possibility.equals(alias)) {
dispHeader = new DisplayHeader(headerCell.value.toString(), alias);
break;
}
}
}
}
}
if (dispHeader != null) {
// We know we need the header asked for:
display.add(dispHeader);
// Look for accompanying sibling column
Table.Cell hcell = table.getHeaderMap().get(dispHeader.name);
String siblingFlag = hcell.attr.get("sibling");
if (siblingFlag != null) {
// ...link the sibling and check that its flag is set
String sibling = siblingFlag + "." + dispHeader.name;
Table.Cell c = table.getHeaderMap().get(sibling);
if (c != null && request.paramAsBoolean(siblingFlag, false)) {
display.add(new DisplayHeader(c.value.toString(), siblingFlag + "." + dispHeader.display));
}
}
}
}
} else {
for (Table.Cell cell : table.getHeaders()) {
String d = cell.attr.get("default");
if (Booleans.parseBoolean(d, true)) {
display.add(new DisplayHeader(cell.value.toString(), cell.value.toString()));
}
}
}
return display;
}
public static int[] buildHelpWidths(Table table, RestRequest request) {
int[] width = new int[3];
for (Table.Cell cell : table.getHeaders()) {
String v = renderValue(request, cell.value);
int vWidth = v == null ? 0 : v.length();
if (width[0] < vWidth) {
width[0] = vWidth;
}
v = renderValue(request, cell.attr.containsKey("alias") ? cell.attr.get("alias") : "");
vWidth = v == null ? 0 : v.length();
if (width[1] < vWidth) {
width[1] = vWidth;
}
v = renderValue(request, cell.attr.containsKey("desc") ? cell.attr.get("desc") : "not available");
vWidth = v == null ? 0 : v.length();
if (width[2] < vWidth) {
width[2] = vWidth;
}
}
return width;
}
private static int[] buildWidths(Table table, RestRequest request, boolean verbose, List headers) {
int[] width = new int[headers.size()];
int i;
if (verbose) {
i = 0;
for (DisplayHeader hdr : headers) {
int vWidth = hdr.display.length();
if (width[i] < vWidth) {
width[i] = vWidth;
}
i++;
}
}
i = 0;
for (DisplayHeader hdr : headers) {
for (Table.Cell cell : table.getAsMap().get(hdr.name)) {
String v = renderValue(request, cell.value);
int vWidth = v == null ? 0 : v.length();
if (width[i] < vWidth) {
width[i] = vWidth;
}
}
i++;
}
return width;
}
public static void pad(Table.Cell cell, int width, RestRequest request, UTF8StreamWriter out) throws IOException {
String sValue = renderValue(request, cell.value);
int length = sValue == null ? 0 : sValue.length();
byte leftOver = (byte) (width - length);
String textAlign = cell.attr.get("text-align");
if (textAlign == null) {
textAlign = "left";
}
if (leftOver > 0 && textAlign.equals("right")) {
for (byte i = 0; i < leftOver; i++) {
out.append(" ");
}
if (sValue != null) {
out.append(sValue);
}
} else {
if (sValue != null) {
out.append(sValue);
}
for (byte i = 0; i < leftOver; i++) {
out.append(" ");
}
}
}
private static String renderValue(RestRequest request, Object value) {
if (value == null) {
return null;
}
if (value instanceof ByteSizeValue) {
ByteSizeValue v = (ByteSizeValue) value;
String resolution = request.param("bytes");
if ("b".equals(resolution)) {
return Long.toString(v.bytes());
} else if ("k".equals(resolution)) {
return Long.toString(v.kb());
} else if ("m".equals(resolution)) {
return Long.toString(v.mb());
} else if ("g".equals(resolution)) {
return Long.toString(v.gb());
} else if ("t".equals(resolution)) {
return Long.toString(v.tb());
} else if ("p".equals(resolution)) {
return Long.toString(v.pb());
} else {
return v.toString();
}
}
if (value instanceof SizeValue) {
SizeValue v = (SizeValue) value;
String resolution = request.param("size");
if ("b".equals(resolution)) {
return Long.toString(v.singles());
} else if ("k".equals(resolution)) {
return Long.toString(v.kilo());
} else if ("m".equals(resolution)) {
return Long.toString(v.mega());
} else if ("g".equals(resolution)) {
return Long.toString(v.giga());
} else if ("t".equals(resolution)) {
return Long.toString(v.tera());
} else if ("p".equals(resolution)) {
return Long.toString(v.peta());
} else {
return v.toString();
}
}
if (value instanceof TimeValue) {
TimeValue v = (TimeValue) value;
String resolution = request.param("time");
if ("ms".equals(resolution)) {
return Long.toString(v.millis());
} else if ("s".equals(resolution)) {
return Long.toString(v.seconds());
} else if ("m".equals(resolution)) {
return Long.toString(v.minutes());
} else if ("h".equals(resolution)) {
return Long.toString(v.hours());
} else {
return v.toString();
}
}
// Add additional built in data points we can render based on request parameters?
return value.toString();
}
static class DisplayHeader {
public final String name;
public final String display;
DisplayHeader(String name, String display) {
this.name = name;
this.display = display;
}
}
}
