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Added FieldAccess#getIndex(Field).

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This can be used to avoid accessing fields by name.
This commit is contained in:
NathanSweet 2016-11-09 01:06:02 +01:00
parent fba5d5ef4c
commit 16bad2e63f
1 changed files with 23 additions and 5 deletions

28
src/com/esotericsoftware/reflectasm/FieldAccess.java
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@ -28,6 +28,7 @@ import org.objectweb.asm.Type;
public abstract class FieldAccess {
private String[] fieldNames;
private Class[] fieldTypes;
private Field[] fields;
public int getIndex (String fieldName) {
for (int i = 0, n = fieldNames.length; i < n; i++)
@ -35,6 +36,12 @@ public abstract class FieldAccess {
throw new IllegalArgumentException("Unable to find non-private field: " + fieldName);
}
public int getIndex (Field field) {
for (int i = 0, n = fields.length; i < n; i++)
if (fields[i].equals(field)) return i;
throw new IllegalArgumentException("Unable to find non-private field: " + field);
}
public void set (Object instance, String fieldName, Object value) {
set(instance, getIndex(fieldName), value);
}
@ -55,6 +62,14 @@ public abstract class FieldAccess {
return fieldTypes.length;
}
public Field[] getFields () {
return fields;
}
public void setFields (Field[] fields) {
this.fields = fields;
}
abstract public void set (Object instance, int fieldIndex, Object value);
abstract public void setBoolean (Object instance, int fieldIndex, boolean value);
@ -130,10 +145,10 @@ public abstract class FieldAccess {
} catch (ClassNotFoundException ignored2) {
String accessClassNameInternal = accessClassName.replace('.', '/');
String classNameInternal = className.replace('.', '/');
ClassWriter cw = new ClassWriter(0);
cw.visit(V1_1, ACC_PUBLIC + ACC_SUPER, accessClassNameInternal, null, "com/esotericsoftware/reflectasm/FieldAccess",
null);
cw.visit(V1_1, ACC_PUBLIC + ACC_SUPER, accessClassNameInternal, null,
"com/esotericsoftware/reflectasm/FieldAccess", null);
insertConstructor(cw);
insertGetObject(cw, classNameInternal, fields);
insertSetObject(cw, classNameInternal, fields);
@ -163,6 +178,7 @@ public abstract class FieldAccess {
FieldAccess access = (FieldAccess)accessClass.newInstance();
access.fieldNames = fieldNames;
access.fieldTypes = fieldTypes;
access.fields = fields.toArray(new Field[fields.size()]);
return access;
} catch (Throwable t) {
throw new RuntimeException("Error constructing field access class: " + accessClassName, t);
@ -365,7 +381,8 @@ public abstract class FieldAccess {
mv.visitEnd();
}
static private void insertSetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields, Type primitiveType) {
static private void insertSetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields,
Type primitiveType) {
int maxStack = 6;
int maxLocals = 4; // See correction below for LLOAD and DLOAD
final String setterMethodName;
@ -458,7 +475,8 @@ public abstract class FieldAccess {
mv.visitEnd();
}
static private void insertGetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields, Type primitiveType) {
static private void insertGetPrimitive (ClassWriter cw, String classNameInternal, ArrayList<Field> fields,
Type primitiveType) {
int maxStack = 6;
final String getterMethodName;
final String typeNameInternal = primitiveType.getDescriptor();