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Merge branch 'version4' into dev

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zaaarf 2023-03-25 20:53:09 +01:00
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128
src/main/java/ftbsc/lll/proxies/AbstractProxy.java
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@ -1,68 +1,71 @@
package ftbsc.lll.proxies; package ftbsc.lll.proxies;
import java.lang.reflect.Modifier; import java.lang.reflect.Modifier;
import org.objectweb.asm.Type;
/** /**
* Abstract proxy class, implementing common aspects * Abstract proxy class, implementing common aspects.
* of {@link MethodProxy} and {@link FieldProxy}.
* @since 0.3.0 * @since 0.3.0
*/ */
public abstract class AbstractProxy { public abstract class AbstractProxy {
/** /**
* The name of the corresponding class member. * Which type of proxy this is.
*/ */
private final String name; public final ProxyType proxyType;
/**
* The name of the corresponding element.
*/
public final String name;
/**
* The descriptor for this element.
*/
public final String descriptor;
/** /**
* The fully qualified name (i.e. java.lang.String) of * The fully qualified name (i.e. java.lang.String) of
* the parent class. * the parent class.
*/ */
private final String parent; public final QualifiableProxy parent;
/** /**
* The modifiers of the member, as a packed int. * The modifiers of the member, as a packed int
* @see java.lang.reflect.Modifier
*/
private final int modifiers;
/**
* @return the name of the item
*/
public String getName() {
return this.name;
}
/**
* @return the modifiers of the member, as a packed int
* @see Modifier * @see Modifier
*/ */
public int getModifiers() { public final int modifiers;
return this.modifiers;
}
/**
* @return the fully qualified name of the parent class
*/
public String getParent() {
return this.parent;
}
/**
* @return the descriptor of the member
*/
public abstract String getDescriptor();
/** /**
* The private constructor, should be called by all classes extending this in theirs. * The private constructor, should be called by all classes extending this in theirs.
* @param name the name of the member * @param name the name of the element
* @param descriptor the descriptor for the element
* @param modifiers the modifiers, as a packed int * @param modifiers the modifiers, as a packed int
* @param parent the FQN of the parent class * @param parent the FQN of the parent class
* @param proxyType the {@link ProxyType} being represented here
*/ */
protected AbstractProxy(String name, int modifiers, String parent) { protected AbstractProxy(String name, String descriptor, int modifiers, QualifiableProxy parent, ProxyType proxyType) {
this.name = name; this.name = name;
this.descriptor = descriptor;
this.modifiers = modifiers; this.modifiers = modifiers;
this.parent = parent; this.parent = parent;
this.proxyType = proxyType;
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
if(obj instanceof AbstractProxy) {
AbstractProxy p = (AbstractProxy) obj;
return p.parent.equals(this.parent)
&& p.name.equals(this.name)
&& p.modifiers == this.modifiers
&& p.descriptor.equals(this.descriptor);
} else return false;
} }
/** /**
@ -72,38 +75,34 @@ public abstract class AbstractProxy {
public abstract static class Builder<T extends AbstractProxy> { public abstract static class Builder<T extends AbstractProxy> {
/** /**
* The name of the member. * The name of the element.
*/ */
protected final String name; protected String name;
/** /**
* The modifiers of the member, as a packed int. * The modifiers of the element, as a packed int.
*/ */
protected int modifiers; protected int modifiers;
/** /**
* The fully qualified name of the parent. * The fully qualified name of the parent.
*/ */
protected String parent; protected QualifiableProxy parent;
/**
* The descriptor of the element.
*/
protected String descriptor;
/** /**
* The constructor. * The constructor.
* @param name the name of the member * @param name the name of the element
*/ */
protected Builder(String name) { protected Builder(String name) {
this.name = name; this.name = name;
this.modifiers = 0; this.modifiers = 0;
} }
/**
* @param parentFQN the fully qualified name of the parent
* @return the current state of the builder
*/
public Builder<T> setParent(String parentFQN) {
this.parent = parentFQN;
return this;
}
/** /**
* @param newModifier the modifier to add * @param newModifier the modifier to add
* @return the current state of the builder * @return the current state of the builder
@ -117,11 +116,38 @@ public abstract class AbstractProxy {
* @param newModifier the new modifier value * @param newModifier the new modifier value
* @return the current state of the builder * @return the current state of the builder
*/ */
public Builder<T> setModifier(int newModifier) { public Builder<T> setModifiers(int newModifier) {
this.modifiers = newModifier; this.modifiers = newModifier;
return this; return this;
} }
/**
* @param parent the {@link QualifiableProxy} representing the parent
* @return the current state of the builder
*/
public Builder<T> setParent(QualifiableProxy parent) {
this.parent = parent;
return this;
}
/**
* Sets {@link Type} for this element from the descriptor, passed as a {@link String}.
* @param descriptor the descriptor passed as a {@link String}
* @return the builder's state after the change
*/
public Builder<T> setDescriptor(String descriptor) {
this.descriptor = descriptor;
return this;
}
/**
* @param type the {@link Type} corresponding to the element
* @return the current state of the builder
*/
public Builder<T> setType(Type type) {
return this.setDescriptor(type.getDescriptor());
}
/** /**
* @return the built proxy object * @return the built proxy object
*/ */

116
src/main/java/ftbsc/lll/proxies/FieldProxy.java
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@ -1,116 +0,0 @@
package ftbsc.lll.proxies;
import ftbsc.lll.tools.DescriptorBuilder;
import org.objectweb.asm.Type;
import java.lang.reflect.Field;
/**
* A container for information about class fields to be used
* in ASM patching.
* @since 0.3.0
*/
public class FieldProxy extends AbstractProxy {
/**
* The descriptor of the field's type.
*/
private final String typeDescriptor;
/**
* A public constructor, builds a proxy from a {@link Field}
* obtained from reflection.
* @param f the {@link Field} object corresponding to this.
*/
public FieldProxy(Field f) {
super(f.getName(), f.getModifiers(), Type.getInternalName(f.getDeclaringClass()));
this.typeDescriptor = Type.getDescriptor(f.getType());
}
/**
* A protected constructor, called only from the builder.
* @param name the name of the field
* @param modifiers the modifiers of the field
* @param parent the FQN of the parent class of the field
* @param typeDescriptor the type descriptor of the field
*/
FieldProxy(String name, int modifiers, String parent, String typeDescriptor) {
super(name, modifiers, parent);
this.typeDescriptor = typeDescriptor;
}
/**
* @return the field's type descriptor
*/
@Override
public String getDescriptor() {
return typeDescriptor;
}
/**
* Returns a new instance of {@link FieldProxy.Builder}.
* @param name the name of the field
* @return the builder object for field proxies
*/
public static Builder builder(String name) {
return new Builder(name);
}
/**
* A builder object for {@link FieldProxy}.
*/
public static class Builder extends AbstractProxy.Builder<FieldProxy> {
/**
* The descriptor of the field's type.
*/
private String typeDescriptor;
/**
* The constructor of the builder, used only internally.
* @param name the name of the field
*/
Builder(String name) {
super(name);
}
/**
* Sets the descriptor of the field type to the given {@link String}.
* @param typeDescriptor the descriptor of the field type
* @return the builder's state after the change
*/
public Builder setDescriptor(String typeDescriptor) {
this.typeDescriptor = typeDescriptor;
return this;
}
/**
* Sets the descriptor of the field type to match the give {@link Class}.
* @param fqn the fully qualified name of the field type
* @param arrayLevel the array level of the field type
* @return the builder's state after the change
*/
public Builder setType(String fqn, int arrayLevel) {
this.typeDescriptor = DescriptorBuilder.nameToDescriptor(fqn, arrayLevel);
return this;
}
/**
* Sets the descriptor of the field type to match the give {@link Class}.
* @param type a {@link Class} object representing the field type
* @return the builder's state after the change
*/
public Builder setType(Class<?> type) {
this.typeDescriptor = Type.getDescriptor(type);
return this;
}
/**
* Builds a {@link FieldProxy} of the given kind.
* @return the built {@link FieldProxy}
*/
@Override
public FieldProxy build() {
return new FieldProxy(this.name, this.modifiers, this.parent, this.typeDescriptor);
}
}
}

230
src/main/java/ftbsc/lll/proxies/MethodProxy.java
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@ -1,230 +0,0 @@
package ftbsc.lll.proxies;
import ftbsc.lll.tools.DescriptorBuilder;
import org.objectweb.asm.Type;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
/**
* A container for information about class methods to be used
* in ASM patching.
* @since 0.3.0
*/
public class MethodProxy extends AbstractProxy {
/**
* The parameters of the method.
* It holds fully qualified names for objects, and {@link Class}
* objects for primitives.
*/
private final Object[] parameters;
/**
* The return type of the method.
* It contains if it's an object, or a {@link Class}
* object for primitives.
*/
private final Object returnType;
/**
* Caches the the descriptor after generating it once for
* performance.
*/
private String descriptorCache;
/**
* A public constructor, builds a proxy from a {@link Method}
* obtained from reflection.
* @param m the {@link Method} object corresponding to this.
*/
public MethodProxy(Method m) {
super(m.getName(), m.getModifiers(), Type.getInternalName(m.getDeclaringClass()));
List<Object> parameters = new ArrayList<>();
for(Class<?> p : m.getParameterTypes())
parameters.add(p.isPrimitive() ? p : new TypeContainer(p));
this.parameters = parameters.toArray();
Class<?> returnType = m.getReturnType();
this.returnType = returnType.isPrimitive() ? returnType : new TypeContainer(returnType);
}
/**
* A protected constructor, called only from the builder.
* @param name the name of the method
* @param modifiers the modifiers of the method
* @param parent the FQN of the parent class of the method
* @param parameters the parameters of the method
* @param returnType the return type of the method
*/
protected MethodProxy(String name, int modifiers, String parent, Object[] parameters, Object returnType) {
super(name, modifiers, parent);
this.parameters = parameters;
this.returnType = returnType;
this.descriptorCache = null;
}
/**
* Builds (or returns from cache if present)
* the method's descriptor.
* @return the method's descriptor
*/
@Override
public String getDescriptor() {
if(this.descriptorCache != null)
return this.descriptorCache;
DescriptorBuilder b = new DescriptorBuilder();
for(Object p : this.parameters)
addTypeToDescriptorBuilder(b, p, false);
addTypeToDescriptorBuilder(b, this.returnType, true);
this.descriptorCache = b.build();
return this.descriptorCache;
}
/**
* A static method used internally to detect and correctly insert a
* {@link TypeContainer} into a {@link DescriptorBuilder}.
* @param b the {@link DescriptorBuilder}
* @param p the {@link TypeContainer}
* @param isReturnType whether it should be inserted as a return type
*/
private static void addTypeToDescriptorBuilder(DescriptorBuilder b, Object p, boolean isReturnType) {
if(p instanceof TypeContainer) {
TypeContainer param = (TypeContainer) p;
if(isReturnType)
b.setReturnType(param.fqn, param.arrayLevel);
else b.addParameter(param.fqn, param.arrayLevel);
} else {
if(isReturnType)
b.setReturnType((Class<?>) p);
else b.addParameter((Class<?>) p);
}
}
/**
* Returns a new instance of {@link MethodProxy.Builder}.
* @param name the name of the method
* @return the builder object for method proxies
*/
public static Builder builder(String name) {
return new Builder(name);
}
/**
* A builder object for {@link MethodProxy}.
*/
public static class Builder extends AbstractProxy.Builder<MethodProxy> {
/**
* The parameters of the method.
*/
private final List<Object> parameters;
/**
* The return type of the method. Defaults to void.
*/
private Object returnType;
/**
* The constructor of the builder, used only internally.
* @param name the name of the method
*/
Builder(String name) {
super(name);
this.parameters = new ArrayList<>();
this.returnType = void.class;
}
/**
* Adds a parameter of a given type.
* @param fqn the fully qualified name of the parameter type
* @param arrayLevel the array level of the parameter type
* @return the builder's state after the change
*/
public Builder addParameter(String fqn, int arrayLevel) {
this.parameters.add(new TypeContainer(fqn, arrayLevel));
return this;
}
/**
* Adds a parameter of a given type.
* @param paramType the {@link Class} object corresponding to
* the parameter type.
* @return the builder's state after the change
*/
public Builder addParameter(Class<?> paramType) {
this.parameters.add(paramType);
return this;
}
/**
* Sets the return type to the given type.
* @param fqn the fully qualified name of the return type
* @param arrayLevel the array level of the return type
* @return the builder's state after the change
*/
public Builder setReturnType(String fqn, int arrayLevel) {
this.returnType = new TypeContainer(fqn, arrayLevel);
return this;
}
/**
* Sets the return type to the given type.
* @param returnType the {@link Class} object corresponding to
* the return type
* @return the builder's state after the change
*/
public Builder setReturnType(Class<?> returnType) {
this.returnType = returnType;
return this;
}
/**
* Builds a {@link MethodProxy} of the given kind.
* @return the built {@link MethodProxy}
*/
@Override
public MethodProxy build() {
return new MethodProxy(name, modifiers, parent, parameters.toArray(), returnType);
}
}
/**
* A container class, holding information about a given type.
*/
protected static class TypeContainer {
/**
* The fully qualified name of the type.
*/
public final String fqn;
/**
* The array level of the type.
*/
public final int arrayLevel;
/**
* Public constructor for the class.
* @param fqn the fully qualified name of the type
* @param arrayLevel the array level of the type
*/
public TypeContainer(String fqn, int arrayLevel) {
this.fqn = fqn;
this.arrayLevel = arrayLevel;
}
/**
* Public constructor for the class, extracting the
* necessary information from a {@link Class} object.
* @param clazz the class object
*/
public TypeContainer(Class<?> clazz) {
int arrayLevel = 0;
while(clazz.isArray()) {
arrayLevel++;
clazz = clazz.getComponentType();
}
this.arrayLevel = arrayLevel;
this.fqn = clazz.getCanonicalName();
}
}
}

11
src/main/java/ftbsc/lll/proxies/ProxyType.java Normal file
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@ -0,0 +1,11 @@
package ftbsc.lll.proxies;
/**
* An enum listing the various proxies.
*/
public enum ProxyType {
FIELD,
METHOD,
TYPE,
PACKAGE
}

67
src/main/java/ftbsc/lll/proxies/QualifiableProxy.java Normal file
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@ -0,0 +1,67 @@
package ftbsc.lll.proxies;
/**
* A proxy for elements who have a fully-qualified name.
* @since 0.4.0
*/
public abstract class QualifiableProxy extends AbstractProxy {
/**
* The fully-qualified name of the element represented by this proxy.
*/
public final String fullyQualifiedName;
/**
* The "internal name" (fully-qualified with slashes) of the element
* represented by this proxy.
*/
public final String internalName;
/**
* The protected constructor, should be called by all classes extending this in theirs.
* @param descriptor the descriptor for the element
* @param modifiers the modifiers, as a packed int
* @param parent the {@link QualifiableProxy} representing the parent of this element
* @param fullyQualifiedName the FQN of the element
* @param proxyType the {@link ProxyType} being represented here
*/
protected QualifiableProxy(String descriptor, int modifiers, QualifiableProxy parent, String fullyQualifiedName, ProxyType proxyType) {
super(extractSimpleNameFromFQN(fullyQualifiedName), descriptor, modifiers, parent, proxyType);
this.fullyQualifiedName = fullyQualifiedName;
this.internalName = this.fullyQualifiedName.replace('.', '/');
}
/**
* Returns a {@link String} containing the FQN of the parent element
* to this, which may represent a package or class.
* @param fqn the fully qualified name of the element
* @return the parent, or null if the parent was the root element
*/
protected static String extractParentFromFQN(String fqn) {
String lastSeparator = fqn.contains("$") ? "\\$" : "\\.";
String[] split = fqn.split(lastSeparator);
if(split.length == 1) return null;
return fqn.substring(0, split[split.length - 1].length() - 1);
}
/**
* Returns a {@link String} containing the simple name of the element.
* @param fqn the fully qualified name of the element
* @return the simple name
*/
protected static String extractSimpleNameFromFQN(String fqn) {
String lastSeparator = fqn.contains("$") ? "\\$" : "\\.";
String[] split = fqn.split(lastSeparator);
if(split.length == 1) return fqn;
else return split[split.length - 1];
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
return obj instanceof QualifiableProxy && super.equals(obj) && ((QualifiableProxy) obj).fullyQualifiedName.equals(fullyQualifiedName);
}
}

98
src/main/java/ftbsc/lll/proxies/impl/FieldProxy.java Normal file
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@ -0,0 +1,98 @@
package ftbsc.lll.proxies.impl;
import ftbsc.lll.proxies.AbstractProxy;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.QualifiableProxy;
import org.objectweb.asm.Type;
import java.lang.reflect.Field;
/**
* A container for information about class fields to be used
* in ASM patching.
* @since 0.3.0
*/
public class FieldProxy extends AbstractProxy {
/**
* Protected constructor, called only from the builder.
* @param name the name of the field
* @param descriptor the descriptor of the field
* @param modifiers the modifiers of the field
* @param parent the {@link QualifiableProxy} for the parent
*/
protected FieldProxy(String name, String descriptor, int modifiers, QualifiableProxy parent) {
super(name, descriptor, modifiers, parent, ProxyType.FIELD);
}
/**
* A public constructor, builds a proxy from a {@link Field}
* obtained from reflection.
* @param f the {@link Field} object corresponding to this.
*/
public FieldProxy(Field f) {
this(f.getName(), Type.getDescriptor(f.getType()), f.getModifiers(), TypeProxy.from(f.getDeclaringClass()));
}
/**
* Returns a new instance of {@link FieldProxy.Builder}.
* @param name the name of the field
* @return the builder object for field proxies
*/
public static Builder builder(String name) {
return new Builder(name);
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
return obj instanceof FieldProxy && super.equals(obj);
}
/**
* A builder object for {@link FieldProxy}.
*/
public static class Builder extends AbstractProxy.Builder<FieldProxy> {
/**
* The constructor of the builder, used only internally.
* @param name the name of the field
*/
Builder(String name) {
super(name);
}
/**
* Sets the parent class of this field to the one described by the
* fully qualified name and with the given modifiers.
* @param parentFQN the fully qualified name of the parent
* @param modifiers the modifiers of the parent
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN, int modifiers) {
super.setParent(TypeProxy.from(parentFQN, 0, modifiers));
return this;
}
/**
* Sets the parent class of this field to the one described by the
* fully qualified name.
* @param parentFQN the fully qualified name of the parent
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN) {
return this.setParent(parentFQN, 0);
}
/**
* Builds a {@link FieldProxy} of the given kind.
* @return the built {@link FieldProxy}
*/
@Override
public FieldProxy build() {
return new FieldProxy(this.name, this.descriptor, this.modifiers, this.parent);
}
}
}

188
src/main/java/ftbsc/lll/proxies/impl/MethodProxy.java Normal file
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@ -0,0 +1,188 @@
package ftbsc.lll.proxies.impl;
import ftbsc.lll.proxies.AbstractProxy;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.QualifiableProxy;
import org.objectweb.asm.Type;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static ftbsc.lll.tools.DescriptorBuilder.nameToDescriptor;
/**
* A container for information about class methods to be used
* in ASM patching.
* @since 0.3.0
*/
public class MethodProxy extends AbstractProxy {
/**
* An array of {@link TypeProxy} each representing the parameters of the method.
*/
public final TypeProxy[] parameters;
/**
* The {@link TypeProxy} for the return type of the method.
*/
public final TypeProxy returnType;
/**
* A protected constructor, called only from the builder.
* @param name the name of the method
* @param modifiers the modifiers of the method
* @param parent the {@link QualifiableProxy} for the parent
* @param parameters the parameters of the method
* @param returnType the return type of the method
*/
protected MethodProxy(String name, int modifiers, QualifiableProxy parent, Type[] parameters, Type returnType) {
super(name, Type.getMethodDescriptor(returnType, parameters), modifiers, parent, ProxyType.METHOD);
this.parameters = Arrays.stream(parameters)
.map(t -> TypeProxy.from(t, 0))
.toArray(TypeProxy[]::new);
this.returnType = TypeProxy.from(returnType, 0);
}
/**
* A public constructor, builds a proxy from a {@link Method}
* obtained from reflection.
* @param m the {@link Method} object corresponding to this.
*/
public MethodProxy(Method m) {
this(m.getName(),
m.getModifiers(),
TypeProxy.from(m.getDeclaringClass()),
Type.getArgumentTypes(m),
Type.getReturnType(m)
);
}
/**
* Returns a new instance of {@link MethodProxy.Builder}.
* @param name the name of the method
* @return the builder object for method proxies
*/
public static Builder builder(String name) {
return new Builder(name);
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
if(obj instanceof MethodProxy) {
MethodProxy m = (MethodProxy) obj;
return super.equals(obj) && m.returnType.equals(this.returnType) && Arrays.equals(m.parameters, this.parameters);
} else return false;
}
/**
* A builder object for {@link MethodProxy}.
*/
public static class Builder extends AbstractProxy.Builder<MethodProxy> {
/**
* The parameters of the method.
*/
private final List<Type> parameters;
/**
* The return type of the method. Defaults to void.
*/
private Type returnType;
/**
* The constructor of the builder, used only internally.
* @param name the name of the method
*/
Builder(String name) {
super(name);
this.parameters = new ArrayList<>();
this.returnType = Type.getType(void.class);
}
/**
* Adds a parameter of a given type.
* @param fqn the fully qualified name of the parameter type
* @param arrayLevel the array level of the parameter type
* @return the builder's state after the change
*/
public Builder addParameter(String fqn, int arrayLevel) {
this.parameters.add(Type.getType(nameToDescriptor(fqn, arrayLevel)));
return this;
}
/**
* Adds a parameter of a given type.
* @param paramType the {@link Class} object corresponding to
* the parameter type.
* @return the builder's state after the change
*/
public Builder addParameter(Class<?> paramType) {
this.parameters.add(Type.getType(paramType));
return this;
}
/**
* Sets the return type to the given type.
* @param fqn the fully qualified name of the return type
* @param arrayLevel the array level of the return type
* @return the builder's state after the change
*/
public Builder setReturnType(String fqn, int arrayLevel) {
this.returnType = Type.getType(nameToDescriptor(fqn, arrayLevel));
return this;
}
/**
* Sets the parent class of this method to the one described by the
* fully qualified name and with the given modifiers.
* @param parentFQN the fully qualified name of the parent
* @param modifiers the modifiers of the parent
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN, int modifiers) {
super.setParent(TypeProxy.from(parentFQN, 0, modifiers));
return this;
}
/**
* Sets the parent class of this method to the one described by the
* fully qualified name.
* @param parentFQN the fully qualified name of the parent
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN) {
return this.setParent(parentFQN, 0);
}
/**
* Sets the return type to the given type.
* @param returnType the {@link Class} object corresponding to
* the return type
* @return the builder's state after the change
*/
public Builder setReturnType(Class<?> returnType) {
this.returnType = Type.getType(returnType);
return this;
}
/**
* Builds a {@link MethodProxy} of the given kind.
* @return the built {@link MethodProxy}
*/
@Override
public MethodProxy build() {
return new MethodProxy(
this.name,
this.modifiers,
this.parent,
this.parameters.toArray(new Type[0]),
this.returnType);
}
}
}

54
src/main/java/ftbsc/lll/proxies/impl/PackageProxy.java Normal file
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@ -0,0 +1,54 @@
package ftbsc.lll.proxies.impl;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.QualifiableProxy;
/**
* A container for information about a package.
* @since 0.4.0
*/
public class PackageProxy extends QualifiableProxy {
/**
* The {@link PackageProxy} representing the root package.
*/
public static final PackageProxy ROOT = new PackageProxy(null, "");
/**
* The protected constructor, called only from {@link PackageProxy#from(String)}.
* @param parent the {@link PackageProxy} representing the parent
* @param fqn the fully-qualified name of this package
*/
protected PackageProxy(PackageProxy parent, String fqn) {
super(null, 0, parent, fqn, ProxyType.PACKAGE);
}
/**
* Builds a {@link PackageProxy} from its fully-qualified name.
* @param fqn the fully-qualified name of the package
* @return the built {@link PackageProxy}
*/
protected static PackageProxy from(String fqn) {
if(fqn == null || fqn.equals("")) return ROOT;
return new PackageProxy(from(extractParentFromFQN(fqn)), fqn);
}
/**
* Builds a {@link PackageProxy} from a reflective {@link Package} object.
* @param p the {@link Package} object
* @return the built {@link PackageProxy}
*/
protected static PackageProxy from(Package p) {
return from(extractParentFromFQN(p.getName()));
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
return obj instanceof PackageProxy && super.equals(obj);
}
}

199
src/main/java/ftbsc/lll/proxies/impl/TypeProxy.java Normal file
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@ -0,0 +1,199 @@
package ftbsc.lll.proxies.impl;
import ftbsc.lll.proxies.AbstractProxy;
import ftbsc.lll.proxies.ProxyType;
import ftbsc.lll.proxies.QualifiableProxy;
import org.objectweb.asm.Type;
import java.lang.reflect.Modifier;
import static ftbsc.lll.tools.DescriptorBuilder.nameToDescriptor;
/**
* A container for information about classes to be used
* in ASM patching.
* @since 0.4.0
*/
public class TypeProxy extends QualifiableProxy {
/**
* Whether this proxy represents a primitive.
*/
public final boolean primitive;
/**
* Protected constructor, called only from the builder.
* @param name the name of the class
* @param descriptor the descriptor of the class
* @param modifiers the modifiers of the class
* @param parent the package containing this class
* @param primitive whether the proxy is a primitive
*/
protected TypeProxy(String name, String descriptor, int modifiers, String parent, boolean primitive) {
super(descriptor, modifiers, PackageProxy.from(parent), String.format("%s.%s", name, parent), ProxyType.TYPE);
this.primitive = primitive;
}
/**
* Protected constructor, called only from the builder.
* @param name the name of the class
* @param descriptor the descriptor of the element
* @param modifiers the modifiers of the class
* @param primitive whether the proxy is a primitive
* @param containerClass the FQN of the parent class of the class
*/
protected TypeProxy(String name, String descriptor, int modifiers, QualifiableProxy containerClass, boolean primitive) {
super(descriptor, modifiers, containerClass, String.format("%s$%s", name, containerClass.fullyQualifiedName), ProxyType.TYPE);
this.primitive = primitive;
}
/**
* Builds a {@link TypeProxy} from a {@link Type} and modifiers.
* @param type the {@link Type} representing this Class
* @param modifiers the modifiers of the class
* @return the builty {@link TypeProxy}
*/
public static TypeProxy from(Type type, int modifiers) {
while(type.getSort() == Type.ARRAY)
type = type.getElementType();
String fqn = type.getInternalName().replace('/', '.');
String simpleName = extractSimpleNameFromFQN(fqn);
String parent = extractParentFromFQN(fqn);
boolean primitive = type.getSort() < Type.ARRAY;
if(fqn.contains("$"))
return new TypeProxy(simpleName, type.getDescriptor(), modifiers, from(type, Modifier.PUBLIC), primitive);
else return new TypeProxy(simpleName, type.getDescriptor(), modifiers, parent, primitive);
}
/**
* Builds a {@link TypeProxy} given only the fully-qualified name and modifiers.
* If present, parent classes will be assumed to have {@code public} as their
* only modifier.
* @param fqn the fully qualified name of the desired class
* @param arrayLevel the array level for this type
* @param modifiers the access modifiers of the desired class
* @return the built {@link TypeProxy}
*/
protected static TypeProxy from(String fqn, int arrayLevel, int modifiers) {
return from(Type.getObjectType(nameToDescriptor(fqn, arrayLevel)), modifiers);
}
/**
* Builds a {@link TypeProxy} from a {@link Class} object.
* @param clazz the {@link Class} object representing the target class
* @return the built {@link TypeProxy}
*/
public static TypeProxy from(Class<?> clazz) {
Class<?> parentClass = clazz.getEnclosingClass();
if(parentClass == null)
return new TypeProxy(
clazz.getSimpleName(),
Type.getDescriptor(clazz),
clazz.getModifiers(),
clazz.getPackage().getName(),
clazz.isPrimitive()
);
else
return new TypeProxy(
clazz.getSimpleName(),
Type.getDescriptor(clazz),
clazz.getModifiers(),
from(parentClass),
clazz.isPrimitive()
);
}
/**
* Returns a new instance of {@link TypeProxy.Builder}.
* @param name the name of the class
* @return the builder object for class proxies
*/
public static Builder builder(String name) {
return new Builder(name);
}
/**
* Indicates whether the given object is a proxy for the same element as this.
* @param obj the object to perform
* @return true if it's equal
*/
@Override
public boolean equals(Object obj) {
return obj instanceof TypeProxy && super.equals(obj);
}
/**
* A builder object for {@link TypeProxy}.
*/
public static class Builder extends AbstractProxy.Builder<TypeProxy> {
/**
* Whether the proxy represents a primitive.
*/
private boolean primitive;
/**
* The constructor of the builder, used only internally.
* @param name the "simple name" of the class
*/
Builder(String name) {
super(name);
this.primitive = false;
}
/**
* Sets this class as an inner class and sets the containing
* class to the given class object.
* @param containerClass the {@link Class} representing the
* container class
* @return the builder's state after the change
*/
public Builder setParent(Class<?> containerClass) {
super.setParent(TypeProxy.from(containerClass));
return this;
}
/**
* Sets this class as an inner class and builds a {@link TypeProxy}
* from the given parent and modifiers.
* @param parentFQN the fully qualified name of the parent
* @param modifiers the modifiers of the parent (if it's a class)
* @param isParentPackage whether this parent should be interpreted as a package or class
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN, int modifiers, boolean isParentPackage) {
super.setParent(isParentPackage ? PackageProxy.from(parentFQN) : TypeProxy.from(parentFQN, 0, modifiers));
return this;
}
/**
* Sets this class as an inner class and builds a {@link TypeProxy}
* from the given parent.
* @param parentFQN the fully qualified name of the parent
* @param isParentPackage whether this parent should be interpreted as a package or class
* @return the builder's state after the change
*/
public Builder setParent(String parentFQN, boolean isParentPackage) {
return this.setParent(parentFQN, 0, isParentPackage);
}
/**
* Sets the primitive flag to true or false, to signal that the type here specified
* is a primitive.
* @param primitive the new state of the primitive flag
* @return the builder's state after the change
*/
public Builder setPrimitive(boolean primitive) {
this.primitive = primitive;
return this;
}
/**
* Builds a {@link TypeProxy} of the given kind.
* @return the built {@link TypeProxy}
*/
@Override
public TypeProxy build() {
return new TypeProxy(this.name, this.descriptor, this.modifiers, this.parent, this.primitive);
}
}
}

15
src/main/java/ftbsc/lll/tools/DescriptorBuilder.java
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@ -26,16 +26,15 @@ public class DescriptorBuilder {
* Initialises default values. * Initialises default values.
*/ */
public DescriptorBuilder() { public DescriptorBuilder() {
this.returnType = Type.getDescriptor(void.class); this.returnType = Type.getDescriptor(void.class);
this.params = new ArrayList<>(); this.params = new ArrayList<>();
} }
/** /**
* Sets the return type to the given type. * Sets the return type to the given type.
* WARNING: will most likely cause problems if used with objects outside the * Passing a {@link Class} may cause problems if used with objects outside the Java
* Java SDK. Pass the fully qualified name as a String rather than the Class * SDK. Pass the fully qualified name as a {@link String} rather than the {@link Class}
* object for non-standard types (such as Minecraft classes). * object for non-standard types.
* @param returnType the Class object corresponding to the return type * @param returnType the Class object corresponding to the return type
* @return the builder's state after the change * @return the builder's state after the change
*/ */
@ -72,9 +71,9 @@ public class DescriptorBuilder {
/** /**
* Adds a parameter of the given class type to the method. * Adds a parameter of the given class type to the method.
* Parameter order matters. * Parameter order matters.
* WARNING: will most likely cause problems if used with objects outside the * Passing a {@link Class} may cause problems if used with objects outside the Java
* Java SDK. Pass the fully qualified name as a String rather than the Class * SDK. Pass the fully qualified name as a {@link String} rather than the {@link Class}
* object for non-standard types (such as Minecraft classes). * object for non-standard types.
* @param param the Class object corresponding to the parameter * @param param the Class object corresponding to the parameter
* @return the builder's state after the change * @return the builder's state after the change
*/ */
@ -113,7 +112,7 @@ public class DescriptorBuilder {
/** /**
* Builds the descriptor into a string. * Builds the descriptor into a string.
* Example result: int m(Object[] o) -> ([Ljava/lang/Object;)I * Example result: {@code int m(Object[] o)} becomes {@code ([Ljava/lang/Object;)I}
* @return the resulting descriptor * @return the resulting descriptor
*/ */
public String build() { public String build() {

9
src/main/java/ftbsc/lll/tools/nodes/FieldProxyInsnNode.java
View file

@ -1,6 +1,6 @@
package ftbsc.lll.tools.nodes; package ftbsc.lll.tools.nodes;
import ftbsc.lll.proxies.FieldProxy; import ftbsc.lll.proxies.impl.FieldProxy;
import org.objectweb.asm.tree.FieldInsnNode; import org.objectweb.asm.tree.FieldInsnNode;
/** /**
@ -17,11 +17,6 @@ public class FieldProxyInsnNode extends FieldInsnNode {
* @param f a {@link FieldProxy} representing the field to call * @param f a {@link FieldProxy} representing the field to call
*/ */
public FieldProxyInsnNode(int opcode, FieldProxy f) { public FieldProxyInsnNode(int opcode, FieldProxy f) {
super( super(opcode, f.parent.internalName, f.name, f.descriptor);
opcode,
f.getParent().replace('.', '/'),
f.getName(),
f.getDescriptor()
);
} }
} }

9
src/main/java/ftbsc/lll/tools/nodes/MethodProxyInsnNode.java
View file

@ -1,6 +1,6 @@
package ftbsc.lll.tools.nodes; package ftbsc.lll.tools.nodes;
import ftbsc.lll.proxies.MethodProxy; import ftbsc.lll.proxies.impl.MethodProxy;
import org.objectweb.asm.tree.MethodInsnNode; import org.objectweb.asm.tree.MethodInsnNode;
/** /**
@ -18,11 +18,6 @@ public class MethodProxyInsnNode extends MethodInsnNode {
* @param m a {@link MethodProxy} representing the method to call * @param m a {@link MethodProxy} representing the method to call
*/ */
public MethodProxyInsnNode(int opcode, MethodProxy m) { public MethodProxyInsnNode(int opcode, MethodProxy m) {
super( super(opcode, m.parent.internalName, m.name, m.descriptor);
opcode,
m.getParent().replace('.', '/'),
m.getName(),
m.getDescriptor()
);
} }
} }

23
src/main/java/ftbsc/lll/tools/nodes/TypeProxyInsnNode.java Normal file
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@ -0,0 +1,23 @@
package ftbsc.lll.tools.nodes;
import ftbsc.lll.proxies.impl.TypeProxy;
import org.objectweb.asm.tree.TypeInsnNode;
/**
* Overrides the {@link TypeInsnNode} to add a constructor
* taking in a {@link TypeProxy}.
* @since 0.4.0
*/
public class TypeProxyInsnNode extends TypeInsnNode {
/**
* Constructs a new {@link TypeInsnNode} starting from a
* {@link TypeProxy}. The user should ensure that the TypeInsnNode
* represents a declared type before calling this.
* @param opcode the opcode, must be one of NEW, ANEWARRAY,
* CHECKCAST or INSTANCEOF
* @param t a {@link TypeProxy} representing the type to call
*/
public TypeProxyInsnNode(int opcode, TypeProxy t) {
super(opcode, t.internalName);
}
}