Class MethodInstance

src/main/java/matcher/type/MethodInstance.java:23–592

import matcher.type.Signature.MethodSignature;

public final class MethodInstance extends MemberInstance<MethodInstance> implements ParentInstance {
	/**
	 * Create a shared unknown method.
	 */
	MethodInstance(ClassInstance cls, String origName, String desc, boolean isStatic) {
		this(cls, origName, desc, null, false, -1, isStatic);
	}

	/**
	 * Create a known method.
	 */
	MethodInstance(ClassInstance cls, String origName, String desc, MethodNode asmNode, boolean nameObfuscated, int position) {
		this(cls, origName, desc, asmNode, nameObfuscated, position, (asmNode.access & Opcodes.ACC_STATIC) != 0);
	}

	private MethodInstance(ClassInstance cls, String origName, String desc, MethodNode asmNode, boolean nameObfuscated, int position, boolean isStatic) {
		super(cls, getId(origName, desc), origName, nameObfuscated, position, isStatic);

		try {
			this.real = asmNode != null;
			this.access = asmNode != null ? asmNode.access : approximateAccess(isStatic);
			this.args = gatherArgs(this, desc, asmNode);
			this.vars = cls.isInput() ? gatherVars(this, asmNode) : emptyVars;
			this.retType = cls.getEnv().getCreateClassInstance(Type.getReturnType(desc).getDescriptor());
			this.signature = asmNode == null || asmNode.signature == null || !cls.isInput() ? null : MethodSignature.parse(asmNode.signature, cls.getEnv());
			this.asmNode = !cls.getEnv().isShared() ? asmNode : null;
		} catch (InvalidSharedEnvQueryException e) {
			throw e.checkOrigin(cls);
		}

		classRefs.add(retType);
		retType.methodTypeRefs.add(this);
	}

	private static int approximateAccess(boolean isStatic) {
		int ret = Opcodes.ACC_PUBLIC;
		if (isStatic) ret |= Opcodes.ACC_STATIC;

		return ret;
	}

	private static MethodVarInstance[] gatherArgs(MethodInstance method, String desc, MethodNode asmNode) {
		Type[] argTypes = Type.getArgumentTypes(desc);
		if (argTypes.length == 0) return emptyVars;

		MethodVarInstance[] args = new MethodVarInstance[argTypes.length];
		List<LocalVariableNode> locals;
		InsnList il;
		AbstractInsnNode firstInsn;

		if (asmNode != null) {
			locals = asmNode.localVariables;
			il = asmNode.instructions;
			firstInsn = il.getFirst();
		} else {
			locals = null;
			il = null;
			firstInsn = null;