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/*
 * VariableDefinition.java
 *
 * Copyright (c) 2013 Mike Strobel
 *
 * This source code is based on Mono.Cecil from Jb Evain, Copyright (c) Jb Evain;
 * and ILSpy/ICSharpCode from SharpDevelop, Copyright (c) AlphaSierraPapa.
 *
 * This source code is subject to terms and conditions of the Apache License, Version 2.0.
 * A copy of the license can be found in the License.html file at the root of this distribution.
 * By using this source code in any fashion, you are agreeing to be bound by the terms of the
 * Apache License, Version 2.0.
 *
 * You must not remove this notice, or any other, from this software.
 */

package com.strobel.assembler.metadata;

import com.strobel.core.VerifyArgument;

/**
 * User: Mike Strobel
 * Date: 1/6/13
 * Time: 2:11 PM
 */
public final class VariableDefinition extends VariableReference {
    private final int _slot;
    private final MethodDefinition _declaringMethod;

    private int _scopeStart;
    private int _scopeEnd;
    private boolean _isTypeKnown;
    private boolean _fromMetadata;
    private ParameterDefinition _parameter;

    public VariableDefinition(final int slot, final String name, final MethodDefinition declaringMethod) {
        super(name, VerifyArgument.notNull(declaringMethod, "declaringMethod").getDeclaringType());
        _declaringMethod = declaringMethod;
        _slot = slot;
    }

    public VariableDefinition(final int slot, final String name, final MethodDefinition declaringMethod, final TypeReference variableType) {
        this(slot, name, declaringMethod);
        setVariableType(variableType);
    }

    public final boolean isParameter() {
        return _parameter != null;
    }

    public final ParameterDefinition getParameter() {
        return _parameter;
    }

    public final void setParameter(final ParameterDefinition parameter) {
        verifyNotFrozen();
        _parameter = parameter;
    }

    @Override
    public final TypeReference getDeclaringType() {
        return _declaringMethod.getDeclaringType();
    }

    public final int getSlot() {
        return _slot;
    }

    public final int getSize() {
        return getVariableType().getSimpleType().stackSlots();
    }

    public final int getScopeStart() {
        return _scopeStart;
    }

    public final void setScopeStart(final int scopeStart) {
        verifyNotFrozen();
        _scopeStart = scopeStart;
    }

    public final int getScopeEnd() {
        return _scopeEnd;
    }

    public final void setScopeEnd(final int scopeEnd) {
        verifyNotFrozen();
        _scopeEnd = scopeEnd;
    }

    public final boolean isTypeKnown() {
        return _isTypeKnown;
    }

    public final void setTypeKnown(final boolean typeKnown) {
        verifyNotFrozen();
        _isTypeKnown = typeKnown;
    }

    public final boolean isFromMetadata() {
        return _fromMetadata;
    }

    public final void setFromMetadata(final boolean fromMetadata) {
        verifyNotFrozen();
        _fromMetadata = fromMetadata;
    }

    @Override
    public VariableDefinition resolve() {
        return this;
    }

    @Override
    public String toString() {
        return "VariableDefinition{" +
               "Slot=" + _slot +
               ", ScopeStart=" + _scopeStart +
               ", ScopeEnd=" + _scopeEnd +
               ", Name=" + getName() +
               ", IsFromMetadata=" + _fromMetadata +
               ", IsTypeKnown=" + _isTypeKnown +
               ", Type=" + getVariableType().getSignature() +
               '}';
    }
}