/*
* 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.painless.node;
import org.elasticsearch.painless.Definition;
import org.elasticsearch.painless.Definition.Field;
import org.elasticsearch.painless.Definition.Method;
import org.elasticsearch.painless.Definition.Sort;
import org.elasticsearch.painless.Definition.Struct;
import org.elasticsearch.painless.Definition.Type;
import org.elasticsearch.painless.Globals;
import org.elasticsearch.painless.Locals;
import org.elasticsearch.painless.Location;
import org.elasticsearch.painless.MethodWriter;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
/**
* Represents a field load/store and defers to a child subnode.
*/
public final class PField extends AStoreable {
private final boolean nullSafe;
private final String value;
private AStoreable sub = null;
public PField(Location location, AExpression prefix, boolean nullSafe, String value) {
super(location, prefix);
this.nullSafe = nullSafe;
this.value = Objects.requireNonNull(value);
}
@Override
void extractVariables(Set<String> variables) {
prefix.extractVariables(variables);
}
@Override
void analyze(Locals locals) {
prefix.analyze(locals);
prefix.expected = prefix.actual;
prefix = prefix.cast(locals);
Sort sort = prefix.actual.sort;
if (sort == Sort.ARRAY) {
sub = new PSubArrayLength(location, prefix.actual.name, value);
} else if (sort == Sort.DEF) {
sub = new PSubDefField(location, value);
} else {
Struct struct = prefix.actual.struct;
Field field = prefix instanceof EStatic ? struct.staticMembers.get(value) : struct.members.get(value);
if (field != null) {
sub = new PSubField(location, field);
} else {
Method getter = struct.methods.get(
new Definition.MethodKey("get" + Character.toUpperCase(value.charAt(0)) + value.substring(1), 0));
if (getter == null) {
getter = struct.methods.get(
new Definition.MethodKey("is" + Character.toUpperCase(value.charAt(0)) + value.substring(1), 0));
}
Method setter = struct.methods.get(
new Definition.MethodKey("set" + Character.toUpperCase(value.charAt(0)) + value.substring(1), 1));
if (getter != null || setter != null) {
sub = new PSubShortcut(location, value, prefix.actual.name, getter, setter);
} else {
EConstant index = new EConstant(location, value);
index.analyze(locals);
if (Map.class.isAssignableFrom(prefix.actual.clazz)) {
sub = new PSubMapShortcut(location, struct, index);
}
if (List.class.isAssignableFrom(prefix.actual.clazz)) {
sub = new PSubListShortcut(location, struct, index);
}
}
}
}
if (sub == null) {
throw createError(new IllegalArgumentException("Unknown field [" + value + "] for type [" + prefix.actual.name + "]."));
}
if (nullSafe) {
sub = new PSubNullSafeField(location, sub);
}
sub.write = write;
sub.read = read;
sub.expected = expected;
sub.explicit = explicit;
sub.analyze(locals);
actual = sub.actual;
}
@Override
void write(MethodWriter writer, Globals globals) {
prefix.write(writer, globals);
sub.write(writer, globals);
}
@Override
boolean isDefOptimized() {
return sub.isDefOptimized();
}
@Override
void updateActual(Type actual) {
sub.updateActual(actual);
this.actual = actual;
}
@Override
int accessElementCount() {
return sub.accessElementCount();
}
@Override
void setup(MethodWriter writer, Globals globals) {
prefix.write(writer, globals);
sub.setup(writer, globals);
}
@Override
void load(MethodWriter writer, Globals globals) {
sub.load(writer, globals);
}
@Override
void store(MethodWriter writer, Globals globals) {
sub.store(writer, globals);
}
@Override
public String toString() {
if (nullSafe) {
return singleLineToString("nullSafe", prefix, value);
}
return singleLineToString(prefix, value);
}
}