org.sonar.java.ast.parser.AstNodeReflector Maven / Gradle / Ivy
/*
* SonarQube Java
* Copyright (C) 2012 SonarSource
* [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.java.ast.parser;
import com.google.common.base.Throwables;
import com.sonar.sslr.api.AstNode;
import com.sonar.sslr.api.Token;
import javax.annotation.Nullable;
import java.lang.reflect.Field;
public class AstNodeReflector {
private static final Field TOKEN_FIELD = getAstNodeField("token");
private static final Field CHILD_INDEX_FIELD = getAstNodeField("childIndex");
private static final Field PARENT_FIELD = getAstNodeField("parent");
private AstNodeReflector() {
}
public static void setToken(AstNode astNode, @Nullable Token token) {
setField(TOKEN_FIELD, astNode, token);
}
public static void setChildIndex(AstNode astNode, int childIndex) {
setField(CHILD_INDEX_FIELD, astNode, childIndex);
}
public static void setParent(AstNode astNode, @Nullable AstNode parent) {
setField(PARENT_FIELD, astNode, parent);
}
private static Field getAstNodeField(String name) {
try {
Field field = AstNode.class.getDeclaredField(name);
field.setAccessible(true);
return field;
} catch (NoSuchFieldException e) {
throw Throwables.propagate(e);
}
}
private static void setField(Field field, Object instance, Object value) {
try {
field.set(instance, value);
} catch (IllegalAccessException e) {
throw Throwables.propagate(e);
}
}
}