| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.tinkerpop.gremlin.process.traversal.translator; |
| |
| import org.apache.commons.configuration2.ConfigurationConverter; |
| import org.apache.commons.text.StringEscapeUtils; |
| import org.apache.tinkerpop.gremlin.jsr223.CoreImports; |
| import org.apache.tinkerpop.gremlin.process.traversal.Bytecode; |
| import org.apache.tinkerpop.gremlin.process.traversal.P; |
| import org.apache.tinkerpop.gremlin.process.traversal.SackFunctions; |
| import org.apache.tinkerpop.gremlin.process.traversal.Script; |
| import org.apache.tinkerpop.gremlin.process.traversal.TextP; |
| import org.apache.tinkerpop.gremlin.process.traversal.Translator; |
| import org.apache.tinkerpop.gremlin.process.traversal.step.TraversalOptionParent; |
| import org.apache.tinkerpop.gremlin.process.traversal.strategy.TraversalStrategyProxy; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.ConnectiveP; |
| import org.apache.tinkerpop.gremlin.process.traversal.util.OrP; |
| import org.apache.tinkerpop.gremlin.structure.Edge; |
| import org.apache.tinkerpop.gremlin.structure.Vertex; |
| import org.apache.tinkerpop.gremlin.structure.VertexProperty; |
| import org.apache.tinkerpop.gremlin.structure.util.StringFactory; |
| import org.apache.tinkerpop.gremlin.util.function.Lambda; |
| |
| import java.math.BigDecimal; |
| import java.math.BigInteger; |
| import java.sql.Timestamp; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.UUID; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Converts bytecode to a Groovy string of Gremlin. |
| * |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| * @author Stark Arya (sandszhou.zj@alibaba-inc.com) |
| */ |
| public final class GroovyTranslator implements Translator.ScriptTranslator { |
| |
| private final String traversalSource; |
| private final TypeTranslator typeTranslator; |
| |
| private GroovyTranslator(final String traversalSource, final TypeTranslator typeTranslator) { |
| this.traversalSource = traversalSource; |
| this.typeTranslator = typeTranslator; |
| } |
| |
| /** |
| * Creates the translator with a {@code false} argument to {@code withParameters} using |
| * {@link #of(String, boolean)}. |
| */ |
| public static GroovyTranslator of(final String traversalSource) { |
| return of(traversalSource, false); |
| } |
| |
| /** |
| * Creates the translator with the {@link DefaultTypeTranslator} passing the {@code withParameters} option to it |
| * which will handle type translation in a fashion that should typically increase cache hits and reduce |
| * compilation times if enabled at the sacrifice to rewriting of the script that could reduce readability. |
| */ |
| public static GroovyTranslator of(final String traversalSource, final boolean withParameters) { |
| return of(traversalSource, new DefaultTypeTranslator(withParameters)); |
| } |
| |
| /** |
| * Creates the translator with a custom {@link TypeTranslator} instance. |
| */ |
| public static GroovyTranslator of(final String traversalSource, final TypeTranslator typeTranslator) { |
| return new GroovyTranslator(traversalSource, typeTranslator); |
| } |
| |
| @Override |
| public Script translate(final Bytecode bytecode) { |
| return typeTranslator.apply(traversalSource, bytecode); |
| } |
| |
| @Override |
| public String getTargetLanguage() { |
| return "gremlin-groovy"; |
| } |
| |
| @Override |
| public String toString() { |
| return StringFactory.translatorString(this); |
| } |
| |
| @Override |
| public String getTraversalSource() { |
| return this.traversalSource; |
| } |
| |
| /** |
| * Performs standard type translation for the TinkerPop types to Groovy. |
| */ |
| public static class DefaultTypeTranslator extends AbstractTypeTranslator { |
| |
| public DefaultTypeTranslator(final boolean withParameters) { |
| super(withParameters); |
| } |
| |
| @Override |
| protected String getNullSyntax() { |
| return "null"; |
| } |
| |
| @Override |
| protected String getSyntax(final String o) { |
| return (o.contains("\"") ? "\"\"\"" + StringEscapeUtils.escapeJava(o) + "\"\"\"" : "\"" + StringEscapeUtils.escapeJava(o) + "\"") |
| .replace("$", "\\$"); |
| } |
| |
| @Override |
| protected String getSyntax(final Boolean o) { |
| return o.toString(); |
| } |
| |
| @Override |
| protected String getSyntax(final Date o) { |
| return "new Date(" + o.getTime() + ")"; |
| } |
| |
| @Override |
| protected String getSyntax(final Timestamp o) { |
| return "new Timestamp(" + o.getTime() + ")"; |
| } |
| |
| @Override |
| protected String getSyntax(final UUID o) { |
| return "UUID.fromString('" + o.toString() + "')"; |
| } |
| |
| @Override |
| protected String getSyntax(final Lambda o) { |
| final String lambdaString = o.getLambdaScript().trim(); |
| return lambdaString.startsWith("{") ? lambdaString : "{" + lambdaString + "}"; |
| } |
| |
| @Override |
| protected String getSyntax(final SackFunctions.Barrier o) { |
| return "SackFunctions.Barrier." + o.toString(); |
| } |
| |
| @Override |
| protected String getSyntax(final VertexProperty.Cardinality o) { |
| return "VertexProperty.Cardinality." + o.toString(); |
| } |
| |
| @Override |
| protected String getSyntax(final TraversalOptionParent.Pick o) { |
| return "TraversalOptionParent.Pick." + o.toString(); |
| } |
| |
| @Override |
| protected String getSyntax(final Number o) { |
| if (o instanceof Long) |
| return o + "L"; |
| else if (o instanceof Double) |
| return o + "d"; |
| else if (o instanceof Float) |
| return o + "f"; |
| else if (o instanceof Integer) |
| return "(int) " + o; |
| else if (o instanceof Byte) |
| return "(byte) " + o; |
| if (o instanceof Short) |
| return "(short) " + o; |
| else if (o instanceof BigInteger) |
| return "new BigInteger('" + o.toString() + "')"; |
| else if (o instanceof BigDecimal) |
| return "new BigDecimal('" + o.toString() + "')"; |
| else |
| return o.toString(); |
| } |
| |
| @Override |
| protected Script produceScript(final Set<?> o) { |
| return produceScript(new ArrayList<>(o)).append(" as Set"); |
| } |
| |
| @Override |
| protected Script produceScript(final List<?> o) { |
| final Iterator<?> iterator = ((List<?>) o).iterator(); |
| script.append("["); |
| |
| while (iterator.hasNext()) { |
| final Object nextItem = iterator.next(); |
| convertToScript(nextItem); |
| if (iterator.hasNext()) |
| script.append(",").append(" "); |
| } |
| |
| return script.append("]"); |
| } |
| |
| @Override |
| protected Script produceScript(final Map<?, ?> o) { |
| script.append("["); |
| final Iterator<? extends Map.Entry<?, ?>> itty = ((Map<?, ?>) o).entrySet().iterator(); |
| while (itty.hasNext()) { |
| final Map.Entry<?,?> entry = itty.next(); |
| script.append("("); |
| convertToScript(entry.getKey()); |
| script.append("):("); |
| convertToScript(entry.getValue()); |
| script.append(")"); |
| if (itty.hasNext()) |
| script.append(","); |
| } |
| return script.append("]"); |
| } |
| |
| /** |
| * Gets the string representation of a class with the default implementation simply checking to see if the |
| * {@code Class} is in {@link CoreImports} or not. If it is present that means it can be referenced using the |
| * simple name otherwise it uses the canonical name. |
| * <p/> |
| * Those building custom {@link ScriptTranslator} instances might override this if they have other classes |
| * that are not in {@link CoreImports} by default. |
| */ |
| @Override |
| protected Script produceScript(final Class<?> o) { |
| return script.append(CoreImports.getClassImports().contains(o) ? o.getSimpleName() : o.getCanonicalName()); |
| } |
| |
| @Override |
| protected Script produceScript(final Enum<?> o) { |
| return script.append(o.getDeclaringClass().getSimpleName() + "." + o.toString()); |
| } |
| |
| @Override |
| protected Script produceScript(final Vertex o) { |
| script.append("new ReferenceVertex("); |
| convertToScript(o.id()); |
| script.append(","); |
| convertToScript(o.label()); |
| return script.append(")"); |
| } |
| |
| @Override |
| protected Script produceScript(final Edge o) { |
| script.append("new ReferenceEdge("); |
| convertToScript(o.id()); |
| script.append(","); |
| convertToScript(o.label()); |
| script.append(",new ReferenceVertex("); |
| convertToScript(o.inVertex().id()); |
| script.append(","); |
| convertToScript(o.inVertex().label()); |
| script.append("),new ReferenceVertex("); |
| convertToScript(o.outVertex().id()); |
| script.append(","); |
| convertToScript(o.outVertex().label()); |
| return script.append("))"); |
| } |
| |
| @Override |
| protected Script produceScript(final VertexProperty<?> o) { |
| script.append("new ReferenceVertexProperty("); |
| convertToScript(o.id()); |
| script.append(","); |
| convertToScript(o.label()); |
| script.append(","); |
| convertToScript(o.value()); |
| return script.append(")"); |
| } |
| |
| @Override |
| protected Script produceScript(final TraversalStrategyProxy<?> o) { |
| if (o.getConfiguration().isEmpty()) { |
| return produceScript(o.getStrategyClass()); |
| } else { |
| script.append("new "); |
| produceScript(o.getStrategyClass()); |
| script.append("("); |
| |
| final Iterator<Map.Entry<Object,Object>> itty = ConfigurationConverter.getMap( |
| o.getConfiguration()).entrySet().iterator(); |
| while (itty.hasNext()) { |
| final Map.Entry<Object,Object> entry = itty.next(); |
| script.append(entry.getKey().toString()); |
| script.append(": "); |
| convertToScript(entry.getValue()); |
| if (itty.hasNext()) script.append(", "); |
| } |
| |
| return script.append(")"); |
| } |
| } |
| |
| @Override |
| protected Script produceScript(final String traversalSource, final Bytecode o) { |
| script.append(traversalSource); |
| for (final Bytecode.Instruction instruction : o.getInstructions()) { |
| final String methodName = instruction.getOperator(); |
| if (0 == instruction.getArguments().length) { |
| script.append(".").append(methodName).append("()"); |
| } else { |
| script.append(".").append(methodName).append("("); |
| |
| final Iterator<Object> itty = Arrays.stream(instruction.getArguments()).iterator(); |
| while(itty.hasNext()) { |
| convertToScript(itty.next()); |
| if (itty.hasNext()) script.append(","); |
| } |
| |
| script.append(")"); |
| } |
| } |
| return script; |
| } |
| |
| @Override |
| protected Script produceScript(final P<?> p) { |
| if (p instanceof TextP) { |
| script.append("TextP.").append(p.getBiPredicate().toString()).append("("); |
| convertToScript(p.getValue()); |
| } else if (p instanceof ConnectiveP) { |
| // ConnectiveP gets some special handling because it's reduced to and(P, P, P) and we want it |
| // generated the way it was written which was P.and(P).and(P) |
| final List<P<?>> list = ((ConnectiveP) p).getPredicates(); |
| final String connector = p instanceof OrP ? "or" : "and"; |
| for (int i = 0; i < list.size(); i++) { |
| produceScript(list.get(i)); |
| |
| // for the first/last P there is no parent to close |
| if (i > 0 && i < list.size() - 1) script.append(")"); |
| |
| // add teh connector for all but last P |
| if (i < list.size() - 1) { |
| script.append(".").append(connector).append("("); |
| } |
| } |
| } else { |
| script.append("P.").append(p.getBiPredicate().toString()).append("("); |
| convertToScript(p.getValue()); |
| } |
| script.append(")"); |
| return script; |
| } |
| |
| private String convertMapToArguments(final Map<Object,Object> map) { |
| return map.entrySet().stream().map(entry -> |
| String.format("%s: %s", entry.getKey().toString(), convertToScript(entry.getValue()))). |
| collect(Collectors.joining(", ")); |
| } |
| } |
| } |