java-genymobile-scrcpy-good-example-of-3-to-1-map

An interesting case. AST mapping is a 3:1 map, and the painting is a 3:1 update.

This mapping has 1 multi-map group: several pairings are equally correct there. The code view shows one arbitrary valid pairing, not the only one.

A painting is a person's account of this edit as text, recorded independently of the node mapping - a rendering often has several equally defensible answers where the mapping has one. Deletions and insertions carry no position on the opposite side in a painting, so that panel draws no caret for them.

Before1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.InvocationTargetException;
10import java.lang.reflect.Method;
11
12public final class PowerManager {
13    private final IInterface manager;
14    private Method isScreenOnMethod;
15
…lines 16–31 unchanged (16 lines)
32    }
33
34    public boolean isScreenOn() {
35        try {
36            Method method = getIsScreenOnMethod();
37            return (boolean) method.invoke(manager);
38        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
39            Ln.e("Could not invoke method", e);
40            return false;
41        }
42    }
43}
44

After1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.Method;
10
11public final class PowerManager {
12    private final IInterface manager;
13    private Method isScreenOnMethod;
14
…lines 15–30 unchanged (16 lines)
31    }
32
33    public boolean isScreenOn() {
34        try {
35            Method method = getIsScreenOnMethod();
36            return (boolean) method.invoke(manager);
37        } catch (ReflectiveOperationException e) {
38            Ln.e("Could not invoke method", e);
39            return false;
40        }
41    }
42}
43

Before1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.InvocationTargetException;
10import java.lang.reflect.Method;
11
12public final class PowerManager {
13    private final IInterface manager;
14    private Method isScreenOnMethod;
15
…lines 16–31 unchanged (16 lines)
32    }
33
34    public boolean isScreenOn() {
35        try {
36            Method method = getIsScreenOnMethod();
37            return (boolean) method.invoke(manager);
38        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
39            Ln.e("Could not invoke method", e);
40            return false;
41        }
42    }
43}
44

After1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.Method;
10
11public final class PowerManager {
12    private final IInterface manager;
13    private Method isScreenOnMethod;
14
…lines 15–30 unchanged (16 lines)
31    }
32
33    public boolean isScreenOn() {
34        try {
35            Method method = getIsScreenOnMethod();
36            return (boolean) method.invoke(manager);
37        } catch (ReflectiveOperationException e) {
38            Ln.e("Could not invoke method", e);
39            return false;
40        }
41    }
42}
43

Before1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.InvocationTargetException;
10import java.lang.reflect.Method;
11
12public final class PowerManager {
13    private final IInterface manager;
14    private Method isScreenOnMethod;
15
…lines 16–31 unchanged (16 lines)
32    }
33
34    public boolean isScreenOn() {
35        try {
36            Method method = getIsScreenOnMethod();
37            return (boolean) method.invoke(manager);
38        } catch (InvocationTargetException | IllegalAccessException | NoSuchMethodException e) {
39            Ln.e("Could not invoke method", e);
40            return false;
41        }
42    }
43}
44

After1package com.genymobile.scrcpy.wrappers;
2
3import com.genymobile.scrcpy.Ln;
4
5import android.annotation.SuppressLint;
6import android.os.Build;
7import android.os.IInterface;
8
9import java.lang.reflect.Method;
10
11public final class PowerManager {
12    private final IInterface manager;
13    private Method isScreenOnMethod;
14
…lines 15–30 unchanged (16 lines)
31    }
32
33    public boolean isScreenOn() {
34        try {
35            Method method = getIsScreenOnMethod();
36            return (boolean) method.invoke(manager);
37        } catch (ReflectiveOperationException e) {
38            Ln.e("Could not invoke method", e);
39            return false;
40        }
41    }
42}
43

Before

program

package_declaration

package "package"

scoped_identifier

identifier "com"

. "."

identifier "genymobile"

. "."

identifier "scrcpy"

. "."

identifier "wrappers"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "com"

. "."

identifier "genymobile"

. "."

identifier "scrcpy"

. "."

identifier "Ln"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "annotation"

. "."

identifier "SuppressLint"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "os"

. "."

identifier "Build"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "os"

. "."

identifier "IInterface"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "java"

. "."

identifier "lang"

. "."

identifier "reflect"

. "."

identifier "InvocationTargetException"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "java"

. "."

identifier "lang"

. "."

identifier "reflect"

. "."

identifier "Method"

; ";"

class_declaration

modifiers

public "public"

final "final"

class "class"

identifier "PowerManager"

class_body

{ "{"

field_declaration

modifiers

private "private"

final "final"

type_identifier "IInterface"

variable_declarator

identifier "manager"

; ";"

field_declaration

modifiers

private "private"

type_identifier "Method"

variable_declarator

identifier "isScreenOnMethod"

; ";"

method_declaration (+43 nodes collapsed)

constructor_declaration (+22 nodes collapsed)

method_declaration (+94 nodes collapsed)

method_declaration

modifiers

public "public"

boolean_type "boolean"

identifier "isScreenOn"

formal_parameters

( "("

) ")"

block

{ "{"

try_statement

try "try"

block (+29 nodes collapsed)

catch_clause

catch "catch"

( "("

catch_formal_parameter

catch_type

type_identifier "InvocationTargetException" any 3:1

| "|"

type_identifier "IllegalAccessException" any 3:1

| "|"

type_identifier "NoSuchMethodException" any 3:1

identifier "e"

) ")"

block (+22 nodes collapsed)

} "}"

After

program

package_declaration

package "package"

scoped_identifier

identifier "com"

. "."

identifier "genymobile"

. "."

identifier "scrcpy"

. "."

identifier "wrappers"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "com"

. "."

identifier "genymobile"

. "."

identifier "scrcpy"

. "."

identifier "Ln"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "annotation"

. "."

identifier "SuppressLint"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "os"

. "."

identifier "Build"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "android"

. "."

identifier "os"

. "."

identifier "IInterface"

; ";"

import_declaration

import "import"

scoped_identifier

identifier "java"

. "."

identifier "lang"

. "."

identifier "reflect"

. "."

identifier "Method"

; ";"

class_declaration

modifiers

public "public"

final "final"

class "class"

identifier "PowerManager"

class_body

{ "{"

field_declaration

modifiers

private "private"

final "final"

type_identifier "IInterface"

variable_declarator

identifier "manager"

; ";"

field_declaration

modifiers

private "private"

type_identifier "Method"

variable_declarator

identifier "isScreenOnMethod"

; ";"

method_declaration (+43 nodes collapsed)

constructor_declaration (+22 nodes collapsed)

method_declaration (+94 nodes collapsed)

method_declaration

modifiers

public "public"

boolean_type "boolean"

identifier "isScreenOn"

formal_parameters

( "("

) ")"

block

{ "{"

try_statement

try "try"

block (+29 nodes collapsed)

catch_clause

catch "catch"

( "("

catch_formal_parameter

catch_type

type_identifier "ReflectiveOperationException" any 3:1

identifier "e"

) ")"

block (+22 nodes collapsed)

} "}"