--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/consumer/ParserFactory.java Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,382 @@
+/*
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.internal.consumer;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.EventType;
+import jdk.jfr.ValueDescriptor;
+import jdk.jfr.internal.LongMap;
+import jdk.jfr.internal.MetadataDescriptor;
+import jdk.jfr.internal.PrivateAccess;
+import jdk.jfr.internal.Type;
+import jdk.jfr.internal.consumer.Parser;
+import jdk.jfr.internal.consumer.RecordingInput;
+
+/**
+ * Class that create parsers suitable for reading events and constant pools
+ */
+final class ParserFactory {
+ private final LongMap<Parser> parsers = new LongMap<>();
+ private final TimeConverter timeConverter;
+ private final LongMap<Type> types = new LongMap<>();
+ private final LongMap<ConstantLookup> constantLookups;
+
+ public ParserFactory(MetadataDescriptor metadata, LongMap<ConstantLookup> constantLookups, TimeConverter timeConverter) throws IOException {
+ this.constantLookups = constantLookups;
+ this.timeConverter = timeConverter;
+ for (Type t : metadata.getTypes()) {
+ types.put(t.getId(), t);
+ }
+ // Add to separate list
+ // so createCompositeParser can throw
+ // IOException outside lambda
+ List<Type> typeList = new ArrayList<>();
+ types.forEach(typeList::add);
+ for (Type t : typeList) {
+ if (!t.getFields().isEmpty()) { // Avoid primitives
+ CompositeParser cp = createCompositeParser(t, false);
+ if (t.isSimpleType()) { // Reduce to nested parser
+ parsers.put(t.getId(), cp.parsers[0]);
+ }
+ }
+ }
+ // Override event types with event parsers
+ for (EventType t : metadata.getEventTypes()) {
+ parsers.put(t.getId(), createEventParser(t));
+ }
+ }
+
+ public LongMap<Parser> getParsers() {
+ return parsers;
+ }
+
+ public LongMap<Type> getTypeMap() {
+ return types;
+ }
+
+ private EventParser createEventParser(EventType eventType) throws IOException {
+ List<Parser> parsers = new ArrayList<Parser>();
+ for (ValueDescriptor f : eventType.getFields()) {
+ parsers.add(createParser(f, true));
+ }
+ return new EventParser(timeConverter, eventType, parsers.toArray(new Parser[0]));
+ }
+
+ private Parser createParser(ValueDescriptor v, boolean event) throws IOException {
+ boolean constantPool = PrivateAccess.getInstance().isConstantPool(v);
+ if (v.isArray()) {
+ Type valueType = PrivateAccess.getInstance().getType(v);
+ ValueDescriptor element = PrivateAccess.getInstance().newValueDescriptor(v.getName(), valueType, v.getAnnotationElements(), 0, constantPool, null);
+ return new ArrayParser(createParser(element, event));
+ }
+ long id = v.getTypeId();
+ Type type = types.get(id);
+ if (type == null) {
+ throw new IOException("Type '" + v.getTypeName() + "' is not defined");
+ }
+ if (constantPool) {
+ ConstantLookup lookup = constantLookups.get(id);
+ if (lookup == null) {
+ ConstantMap pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName());
+ lookup = new ConstantLookup(pool, type);
+ constantLookups.put(id, lookup);
+ }
+ if (event) {
+ return new EventValueConstantParser(lookup);
+ }
+ return new ConstantValueParser(lookup);
+ }
+ Parser parser = parsers.get(id);
+ if (parser == null) {
+ if (!v.getFields().isEmpty()) {
+ return createCompositeParser(type, event);
+ } else {
+ return registerParserType(type, createPrimitiveParser(type, constantPool));
+ }
+ }
+ return parser;
+ }
+
+ private Parser createPrimitiveParser(Type type, boolean event) throws IOException {
+ switch (type.getName()) {
+ case "int":
+ return new IntegerParser();
+ case "long":
+ return new LongParser();
+ case "float":
+ return new FloatParser();
+ case "double":
+ return new DoubleParser();
+ case "char":
+ return new CharacterParser();
+ case "boolean":
+ return new BooleanParser();
+ case "short":
+ return new ShortParser();
+ case "byte":
+ return new ByteParser();
+ case "java.lang.String":
+ ConstantMap pool = new ConstantMap(ObjectFactory.create(type, timeConverter), type.getName());
+ ConstantLookup lookup = new ConstantLookup(pool, type);
+ constantLookups.put(type.getId(), lookup);
+ return new StringParser(lookup, event);
+ default:
+ throw new IOException("Unknown primitive type " + type.getName());
+ }
+ }
+
+ private Parser registerParserType(Type t, Parser parser) {
+ Parser p = parsers.get(t.getId());
+ // check if parser exists (known type)
+ if (p != null) {
+ return p;
+ }
+ parsers.put(t.getId(), parser);
+ return parser;
+ }
+
+ private CompositeParser createCompositeParser(Type type, boolean event) throws IOException {
+ List<ValueDescriptor> vds = type.getFields();
+ Parser[] parsers = new Parser[vds.size()];
+ CompositeParser composite = new CompositeParser(parsers);
+ // need to pre-register so recursive types can be handled
+ registerParserType(type, composite);
+
+ int index = 0;
+ for (ValueDescriptor vd : vds) {
+ parsers[index++] = createParser(vd, event);
+ }
+ return composite;
+ }
+
+ private static final class BooleanParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return input.readBoolean() ? Boolean.TRUE : Boolean.FALSE;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.skipBytes(1);
+ }
+ }
+
+ private static final class ByteParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return Byte.valueOf(input.readByte());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.skipBytes(1);
+ }
+ }
+
+ private static final class LongParser extends Parser {
+ private Object lastLongObject = Long.valueOf(0);
+ private long last = 0;
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ long l = input.readLong();
+ if (l == last) {
+ return lastLongObject;
+ }
+ last = l;
+ lastLongObject = Long.valueOf(l);
+ return lastLongObject;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readLong();
+ }
+ }
+
+ private static final class IntegerParser extends Parser {
+ private Integer lastIntegergObject = Integer.valueOf(0);
+ private int last = 0;
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ int i = input.readInt();
+ if (i != last) {
+ last = i;
+ lastIntegergObject = Integer.valueOf(i);
+ }
+ return lastIntegergObject;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readInt();
+ }
+ }
+
+ private static final class ShortParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return Short.valueOf(input.readShort());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readShort();
+ }
+ }
+
+ private static final class CharacterParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return Character.valueOf(input.readChar());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readChar();
+ }
+ }
+
+ private static final class FloatParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return Float.valueOf(input.readFloat());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.skipBytes(Float.SIZE);
+ }
+ }
+
+ private static final class DoubleParser extends Parser {
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return Double.valueOf(input.readDouble());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.skipBytes(Double.SIZE);
+ }
+ }
+
+ private final static class ArrayParser extends Parser {
+ private final Parser elementParser;
+
+ public ArrayParser(Parser elementParser) {
+ this.elementParser = elementParser;
+ }
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ final int size = input.readInt();
+ final Object[] array = new Object[size];
+ for (int i = 0; i < size; i++) {
+ array[i] = elementParser.parse(input);
+ }
+ return array;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ final int size = input.readInt();
+ for (int i = 0; i < size; i++) {
+ elementParser.skip(input);
+ }
+ }
+ }
+
+ private final static class CompositeParser extends Parser {
+ private final Parser[] parsers;
+
+ public CompositeParser(Parser[] valueParsers) {
+ this.parsers = valueParsers;
+ }
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ final Object[] values = new Object[parsers.length];
+ for (int i = 0; i < values.length; i++) {
+ values[i] = parsers[i].parse(input);
+ }
+ return values;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ for (int i = 0; i < parsers.length; i++) {
+ parsers[i].skip(input);
+ }
+ }
+ }
+
+ private static final class EventValueConstantParser extends Parser {
+ private final ConstantLookup lookup;
+ private Object lastValue = 0;
+ private long lastKey = -1;
+ EventValueConstantParser(ConstantLookup lookup) {
+ this.lookup = lookup;
+ }
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ long key = input.readLong();
+ if (key == lastKey) {
+ return lastValue;
+ }
+ lastKey = key;
+ lastValue = lookup.getCurrentResolved(key);
+ return lastValue;
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readLong();
+ }
+ }
+
+ private static final class ConstantValueParser extends Parser {
+ private final ConstantLookup lookup;
+ ConstantValueParser(ConstantLookup lookup) {
+ this.lookup = lookup;
+ }
+
+ @Override
+ public Object parse(RecordingInput input) throws IOException {
+ return lookup.getCurrent(input.readLong());
+ }
+
+ @Override
+ public void skip(RecordingInput input) throws IOException {
+ input.readLong();
+ }
+ }
+}